mirror of https://github.com/arendst/Tasmota.git
Add final support for MH-Z19(B)
* Add support for sensor MH-Z19(B) to be enabled with define USE_MHZ19 in user_config.h (#561, #1248)
This commit is contained in:
arendst
parent
0129fc9825
commit
41e315bdf4
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@ -4,12 +4,10 @@
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* Change Wemo SetBinaryState to distinguish from GetBinaryState (#1357)
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* Change output of HTTP command to valid JSON only (#1363)
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* Change output to valid JSON Array if needed (#1363)
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* Add support for sensor MH-Z19(B) to be enabled with define USE_MHZ19 in user_config.h (#561, #1248)
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*
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* 5.10.0a
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* Add (experimental) support for sensor SHT3x
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* Add support for sensor MH-Z19(B) using serial interface to be enabled with define USE_MHZ19_HARD_SERIAL in user_config.h (#561, #1248)
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* Add (experimental) support for sensor MH-Z19(B) using SoftwareSerial to be enabled with define USE_MHZ19_SOFT_SERIAL_OBSOLETE in user_config.h (#561, #1248)
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* Add (experimental) support for sensor MH-Z19(B) using stripped SoftwareSerial to be enabled with define USE_MHZ19_SOFT_SERIAL in user_config.h (#561, #1248)
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* Add support for iTead SI7021 temperature and humidity sensor by consolidating DHT22 into AM2301 and using former DHT22 as SI7021 (#735)
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* Fix BME280 calculation (#1051)
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* Add support for BME680 using adafruit libraries (#1212)
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@ -192,9 +192,7 @@
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#define USE_WS2812_CTYPE 1 // WS2812 Color type (0 - RGB, 1 - GRB, 2 - RGBW, 3 - GRBW)
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// #define USE_WS2812_DMA // DMA supports only GPIO03 (= Serial RXD) (+1k mem). When USE_WS2812_DMA is enabled expect Exceptions on Pow
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//#define USE_MHZ19_HARD_SERIAL // Add support for MH-Z19 CO2 sensor using hardware serial interface at 9600 bps on GPIO1/3 only (+1k1 code)
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//#define USE_MHZ19_SOFT_SERIAL // Add support for MH-Z19 CO2 sensor using software serial interface at 9600 bps (+2k3 code, 215 iram)
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//#define USE_MHZ19_SOFT_SERIAL_OBSOLETE // Add support for MH-Z19 CO2 sensor using software serial interface at 9600 bps (+2k3 code, 420 iram)
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//#define USE_MHZ19 // Add support for MH-Z19 CO2 sensor (+1k8 code)
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#define USE_ARILUX_RF // Add support for Arilux RF remote controller (+0k8 code)
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@ -1,7 +1,7 @@
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/*
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xsns_15_mhz.ino - MH-Z19 CO2 sensor support for Sonoff-Tasmota
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xsns_15_mhz.ino - MH-Z19(B) CO2 sensor support for Sonoff-Tasmota
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Copyright (C) 2017 Theo Arends
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Copyright (C) 2018 Theo Arends
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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@ -17,11 +17,11 @@
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef USE_MHZ19_SOFT_SERIAL
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#ifdef USE_MHZ19
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/*********************************************************************************************\
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* MH-Z19 - CO2 sensor
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*
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* Based on EspEasy plugin P049 by Dmitry (rel22 ___ inbox.ru)
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* Adapted from EspEasy plugin P049 by Dmitry (rel22 ___ inbox.ru)
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**********************************************************************************************
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* Filter usage
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*
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@ -53,7 +53,7 @@ enum Mhz19FilterOptions {MHZ19_FILTER_OFF, MHZ19_FILTER_OFF_ALLSAMPLES, MHZ19_FI
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/*********************************************************************************************/
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#define MHZ19_BAUDRATE 9600
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#define MHZ19_READ_TIMEOUT 600 // Must be way less than 1000
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#define MHZ19_READ_TIMEOUT 500 // Must be way less than 1000
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const char kMhz19Types[] PROGMEM = "MHZ19|MHZ19B";
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@ -61,14 +61,17 @@ const uint8_t mhz19_cmnd_read_ppm[9] = {0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0
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const uint8_t mhz19_cmnd_abc_enable[9] = {0xFF, 0x01, 0x79, 0xA0, 0x00, 0x00, 0x00, 0x00, 0xE6};
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const uint8_t mhz19_cmnd_abc_disable[9] = {0xFF, 0x01, 0x79, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86};
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uint8_t mhz19_type = 0;
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uint8_t mhz19_type = 1;
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uint16_t mhz19_last_ppm = 0;
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uint8_t mhz19_filter = MHZ19_FILTER_OPTION;
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uint8_t mhz19_response[9];
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bool mhz19_abc_enable = MHZ19_ABC_ENABLE;
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bool mhz19_abc_must_apply = false;
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char mhz19_types[7];
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float mhz19_temperature = 0;
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uint8_t mhz19_timer = 0;
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Ticker mhz19_ticker;
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/*********************************************************************************************\
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* Subset SoftwareSerial
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\*********************************************************************************************/
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@ -85,7 +88,7 @@ unsigned long mhz19_serial_bit_time;
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unsigned long mhz19_serial_bit_time_start;
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bool Mhz19SerialValidGpioPin(uint8_t pin) {
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return (pin >= 0 && pin <= 5) || (pin >= 12 && pin <= 15);
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return (pin >= 0 && pin <= 5) || (pin >= 9 && pin <= 10) || (pin >= 12 && pin <= 15);
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}
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bool Mhz19Serial(uint8_t receive_pin, uint8_t transmit_pin)
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@ -158,7 +161,7 @@ size_t Mhz19SerialWrite(const uint8_t *buffer, size_t size = 1) {
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return n;
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}
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void Mhz19SerialRxRead() ICACHE_RAM_ATTR; // Add 215 bytes to iram usage
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//void Mhz19SerialRxRead() ICACHE_RAM_ATTR; // Add 215 bytes to iram usage
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void Mhz19SerialRxRead() {
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// Advance the starting point for the samples but compensate for the
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// initial delay which occurs before the interrupt is delivered
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@ -222,31 +225,29 @@ bool Mhz19CheckAndApplyFilter(uint16_t ppm, uint8_t s)
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return true;
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}
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bool Mhz19Read(uint16_t &p, float &t)
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void Mhz19222ms()
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{
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bool status = false;
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uint8_t mhz19_response[9];
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p = 0;
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t = NAN;
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mhz19_timer++;
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if (6 == mhz19_timer) { // MH-Z19 measuring cycle takes 1005 +5% ms
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mhz19_timer = 0;
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if (mhz19_type)
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{
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Mhz19SerialFlush();
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if (Mhz19SerialWrite(mhz19_cmnd_read_ppm, 9) != 9) {
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return false; // Unable to send 9 bytes
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}
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memset(mhz19_response, 0, sizeof(mhz19_response));
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uint32_t start = millis();
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Mhz19SerialWrite(mhz19_cmnd_read_ppm, 9);
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}
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if (1 == mhz19_timer) {
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unsigned long start = millis();
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uint8_t counter = 0;
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while (((millis() - start) < MHZ19_READ_TIMEOUT) && (counter < 9)) {
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if (Mhz19SerialAvailable() > 0) {
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mhz19_response[counter++] = Mhz19SerialRead();
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} else {
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delay(10);
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}
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}
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if (counter < 9){
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return false; // Timeout while trying to read
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if (counter < 9) {
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// AddLog_P(LOG_LEVEL_DEBUG, PSTR(D_LOG_DEBUG "MH-Z19 comms timeout"));
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return;
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}
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byte crc = 0;
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@ -255,61 +256,55 @@ bool Mhz19Read(uint16_t &p, float &t)
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}
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crc = 255 - crc;
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crc++;
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if (mhz19_response[8] != crc) {
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// AddLog_P(LOG_LEVEL_DEBUG, PSTR(D_LOG_DEBUG "MH-Z19 crc error"));
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return;
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}
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if (0xFF != mhz19_response[0] || 0x86 != mhz19_response[1]) {
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// AddLog_P(LOG_LEVEL_DEBUG, PSTR(D_LOG_DEBUG "MH-Z19 bad response"));
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return;
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}
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/*
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// Test data
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mhz19_response[0] = 0xFF;
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mhz19_response[1] = 0x86;
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mhz19_response[2] = 0x12;
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mhz19_response[3] = 0x86;
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mhz19_response[4] = 64;
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// mhz19_response[5] = 32;
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mhz19_response[8] = crc;
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*/
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uint16_t u = (mhz19_response[6] << 8) | mhz19_response[7];
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if (15000 == u) { // During (and only ever at) sensor boot, 'u' is reported as 15000
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if (!mhz19_abc_enable) {
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// After bootup of the sensor the ABC will be enabled.
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// Thus only actively disable after bootup.
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mhz19_abc_must_apply = true;
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}
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} else {
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uint16_t ppm = (mhz19_response[2] << 8) | mhz19_response[3];
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mhz19_temperature = ConvertTemp((float)mhz19_response[4] - 40);
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uint8_t s = mhz19_response[5];
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mhz19_type = (s) ? 1 : 2;
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if (Mhz19CheckAndApplyFilter(ppm, s)) {
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if (0xFF == mhz19_response[0] && 0x86 == mhz19_response[1] && mhz19_response[8] == crc) {
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uint16_t u = (mhz19_response[6] << 8) | mhz19_response[7];
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if (15000 == u) { // During (and only ever at) sensor boot, 'u' is reported as 15000
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if (!mhz19_abc_enable) {
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// After bootup of the sensor the ABC will be enabled.
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// Thus only actively disable after bootup.
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mhz19_abc_must_apply = true;
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}
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} else {
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uint16_t ppm = (mhz19_response[2] << 8) | mhz19_response[3];
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t = ConvertTemp((float)mhz19_response[4] - 40);
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uint8_t s = mhz19_response[5];
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if (s) {
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mhz19_type = 1;
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} else {
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mhz19_type = 2;
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}
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if (Mhz19CheckAndApplyFilter(ppm, s)) {
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p = mhz19_last_ppm;
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if (0 == s || 64 == s) { // Reading is stable.
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if (mhz19_abc_must_apply) {
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mhz19_abc_must_apply = false;
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if (mhz19_abc_enable) {
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Mhz19SerialWrite(mhz19_cmnd_abc_enable, 9); // Sent sensor ABC Enable
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} else {
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Mhz19SerialWrite(mhz19_cmnd_abc_disable, 9); // Sent sensor ABC Disable
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}
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if (0 == s || 64 == s) { // Reading is stable.
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if (mhz19_abc_must_apply) {
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mhz19_abc_must_apply = false;
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if (mhz19_abc_enable) {
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Mhz19SerialWrite(mhz19_cmnd_abc_enable, 9); // Sent sensor ABC Enable
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} else {
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Mhz19SerialWrite(mhz19_cmnd_abc_disable, 9); // Sent sensor ABC Disable
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}
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}
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status = true;
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}
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}
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}
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}
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return status;
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}
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/*********************************************************************************************/
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void Mhz19Init()
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{
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if (Mhz19Serial(pin[GPIO_MHZ_RXD], pin[GPIO_MHZ_TXD])) {
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mhz19_type = 1;
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mhz19_type = 0;
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if ((pin[GPIO_MHZ_RXD] < 99) && (pin[GPIO_MHZ_TXD] < 99)) {
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if (Mhz19Serial(pin[GPIO_MHZ_RXD], pin[GPIO_MHZ_TXD])) {
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mhz19_type = 1;
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mhz19_ticker.attach_ms(222, Mhz19222ms);
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}
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}
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}
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@ -320,25 +315,20 @@ const char HTTP_SNS_CO2[] PROGMEM =
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void Mhz19Show(boolean json)
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{
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uint16_t co2;
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float t;
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char temperature[10];
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dtostrfd(mhz19_temperature, Settings.flag2.temperature_resolution, temperature);
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GetTextIndexed(mhz19_types, sizeof(mhz19_types), mhz19_type -1, kMhz19Types);
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if (Mhz19Read(co2, t)) {
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char temperature[10];
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dtostrfd(t, Settings.flag2.temperature_resolution, temperature);
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GetTextIndexed(mhz19_types, sizeof(mhz19_types), mhz19_type -1, kMhz19Types);
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if (json) {
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snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s,\"%s\":{\"" D_CO2 "\":%d,\"" D_TEMPERATURE "\":%s}"), mqtt_data, mhz19_types, co2, temperature);
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if (json) {
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snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s,\"%s\":{\"" D_CO2 "\":%d,\"" D_TEMPERATURE "\":%s}"), mqtt_data, mhz19_types, mhz19_last_ppm, temperature);
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#ifdef USE_DOMOTICZ
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DomoticzSensor(DZ_COUNT, co2);
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DomoticzSensor(DZ_COUNT, mhz19_last_ppm);
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#endif // USE_DOMOTICZ
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#ifdef USE_WEBSERVER
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} else {
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snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_CO2, mqtt_data, mhz19_types, co2);
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snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_TEMP, mqtt_data, mhz19_types, temperature, TempUnit());
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} else {
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snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_CO2, mqtt_data, mhz19_types, mhz19_last_ppm);
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snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_TEMP, mqtt_data, mhz19_types, temperature, TempUnit());
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#endif // USE_WEBSERVER
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}
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}
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}
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@ -352,21 +342,17 @@ boolean Xsns15(byte function)
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{
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boolean result = false;
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if ((pin[GPIO_MHZ_RXD] < 99) && (pin[GPIO_MHZ_TXD] < 99)) {
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if (mhz19_type) {
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switch (function) {
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case FUNC_XSNS_INIT:
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Mhz19Init();
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break;
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case FUNC_XSNS_PREP_BEFORE_TELEPERIOD:
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// Mhz19Prep();
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break;
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case FUNC_XSNS_JSON_APPEND:
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Mhz19Show(1);
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break;
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#ifdef USE_WEBSERVER
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case FUNC_XSNS_WEB_APPEND:
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Mhz19Show(0);
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// Mhz19Prep();
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break;
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#endif // USE_WEBSERVER
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}
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@ -374,4 +360,4 @@ boolean Xsns15(byte function)
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return result;
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}
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#endif // USE_MHZ19_SOFT_SERIAL
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#endif // USE_MHZ19
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@ -1,277 +0,0 @@
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/*
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xsns_15_mhz.ino - MH-Z19 CO2 sensor support for Sonoff-Tasmota
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Copyright (C) 2017 Theo Arends
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef USE_MHZ19_HARD_SERIAL
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/*********************************************************************************************\
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* MH-Z19 - CO2 sensor
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*
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* Supported on hardware serial interface only due to lack of iram needed by SoftwareSerial
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*
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* Based on EspEasy plugin P049 by Dmitry (rel22 ___ inbox.ru)
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*
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**********************************************************************************************
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* Filter usage
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*
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* Select filter usage on low stability readings
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\*********************************************************************************************/
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enum Mhz19FilterOptions {MHZ19_FILTER_OFF, MHZ19_FILTER_OFF_ALLSAMPLES, MHZ19_FILTER_FAST, MHZ19_FILTER_MEDIUM, MHZ19_FILTER_SLOW};
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#define MHZ19_FILTER_OPTION MHZ19_FILTER_FAST
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/*********************************************************************************************\
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* Source: http://www.winsen-sensor.com/d/files/infrared-gas-sensor/mh-z19b-co2-ver1_0.pdf
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*
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* Automatic Baseline Correction (ABC logic function)
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*
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* ABC logic function refers to that sensor itself do zero point judgment and automatic calibration procedure
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* intelligently after a continuous operation period. The automatic calibration cycle is every 24 hours after powered on.
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*
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* The zero point of automatic calibration is 400ppm.
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*
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* This function is usually suitable for indoor air quality monitor such as offices, schools and homes,
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* not suitable for greenhouse, farm and refrigeratory where this function should be off.
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*
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* Please do zero calibration timely, such as manual or commend calibration.
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\*********************************************************************************************/
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#define MHZ19_ABC_ENABLE 1 // Automatic Baseline Correction (0 = off, 1 = on (default))
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/*********************************************************************************************/
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#define MHZ19_BAUDRATE 9600
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#define MHZ19_READ_TIMEOUT 600 // Must be way less than 1000
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const char kMhz19Types[] PROGMEM = "MHZ19|MHZ19B";
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const byte mhz19_cmnd_read_ppm[9] = {0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79};
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const byte mhz19_cmnd_abc_enable[9] = {0xFF, 0x01, 0x79, 0xA0, 0x00, 0x00, 0x00, 0x00, 0xE6};
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const byte mhz19_cmnd_abc_disable[9] = {0xFF, 0x01, 0x79, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86};
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uint8_t mhz19_type = 0;
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uint16_t mhz19_last_ppm = 0;
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uint8_t mhz19_filter = MHZ19_FILTER_OPTION;
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byte mhz19_response[9];
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bool mhz19_abc_enable = MHZ19_ABC_ENABLE;
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bool mhz19_abc_must_apply = false;
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char mhz19_types[7];
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bool Mhz19CheckAndApplyFilter(uint16_t ppm, uint8_t s)
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{
|
||||
if (1 == s) {
|
||||
return false; // S==1 => "A" version sensor bootup, do not use values.
|
||||
}
|
||||
if (mhz19_last_ppm < 400 || mhz19_last_ppm > 5000) {
|
||||
// Prevent unrealistic values during start-up with filtering enabled.
|
||||
// Just assume the entered value is correct.
|
||||
mhz19_last_ppm = ppm;
|
||||
return true;
|
||||
}
|
||||
int32_t difference = ppm - mhz19_last_ppm;
|
||||
if (s > 0 && s < 64 && mhz19_filter != MHZ19_FILTER_OFF) {
|
||||
// Not the "B" version of the sensor, S value is used.
|
||||
// S==0 => "B" version, else "A" version
|
||||
// The S value is an indication of the stability of the reading.
|
||||
// S == 64 represents a stable reading and any lower value indicates (unusual) fast change.
|
||||
// Now we increase the delay filter for low values of S and increase response time when the
|
||||
// value is more stable.
|
||||
// This will make the reading useful in more turbulent environments,
|
||||
// where the sensor would report more rapid change of measured values.
|
||||
difference = difference * s;
|
||||
difference /= 64;
|
||||
}
|
||||
switch (mhz19_filter) {
|
||||
case MHZ19_FILTER_OFF: {
|
||||
if (s != 0 && s != 64) {
|
||||
return false;
|
||||
}
|
||||
break;
|
||||
}
|
||||
// #Samples to reach >= 75% of step response
|
||||
case MHZ19_FILTER_OFF_ALLSAMPLES:
|
||||
break; // No Delay
|
||||
case MHZ19_FILTER_FAST:
|
||||
difference /= 2;
|
||||
break; // Delay: 2 samples
|
||||
case MHZ19_FILTER_MEDIUM:
|
||||
difference /= 4;
|
||||
break; // Delay: 5 samples
|
||||
case MHZ19_FILTER_SLOW:
|
||||
difference /= 8;
|
||||
break; // Delay: 11 samples
|
||||
}
|
||||
mhz19_last_ppm = static_cast<uint16_t>(mhz19_last_ppm + difference);
|
||||
return true;
|
||||
}
|
||||
|
||||
bool Mhz19Read(uint16_t &p, float &t)
|
||||
{
|
||||
bool status = false;
|
||||
|
||||
p = 0;
|
||||
t = NAN;
|
||||
|
||||
if (mhz19_type)
|
||||
{
|
||||
Serial.flush();
|
||||
if (Serial.write(mhz19_cmnd_read_ppm, 9) != 9) {
|
||||
return false; // Unable to send 9 bytes
|
||||
}
|
||||
memset(mhz19_response, 0, sizeof(mhz19_response));
|
||||
uint32_t start = millis();
|
||||
uint8_t counter = 0;
|
||||
while (((millis() - start) < MHZ19_READ_TIMEOUT) && (counter < 9)) {
|
||||
if (Serial.available() > 0) {
|
||||
mhz19_response[counter++] = Serial.read();
|
||||
} else {
|
||||
delay(10);
|
||||
}
|
||||
}
|
||||
if (counter < 9){
|
||||
return false; // Timeout while trying to read
|
||||
}
|
||||
|
||||
byte crc = 0;
|
||||
for (uint8_t i = 1; i < 8; i++) {
|
||||
crc += mhz19_response[i];
|
||||
}
|
||||
crc = 255 - crc;
|
||||
crc++;
|
||||
|
||||
/*
|
||||
// Test data
|
||||
mhz19_response[0] = 0xFF;
|
||||
mhz19_response[1] = 0x86;
|
||||
mhz19_response[2] = 0x12;
|
||||
mhz19_response[3] = 0x86;
|
||||
mhz19_response[4] = 64;
|
||||
// mhz19_response[5] = 32;
|
||||
mhz19_response[8] = crc;
|
||||
*/
|
||||
|
||||
if (0xFF == mhz19_response[0] && 0x86 == mhz19_response[1] && mhz19_response[8] == crc) {
|
||||
uint16_t u = (mhz19_response[6] << 8) | mhz19_response[7];
|
||||
if (15000 == u) { // During (and only ever at) sensor boot, 'u' is reported as 15000
|
||||
if (!mhz19_abc_enable) {
|
||||
// After bootup of the sensor the ABC will be enabled.
|
||||
// Thus only actively disable after bootup.
|
||||
mhz19_abc_must_apply = true;
|
||||
}
|
||||
} else {
|
||||
uint16_t ppm = (mhz19_response[2] << 8) | mhz19_response[3];
|
||||
t = ConvertTemp((float)mhz19_response[4] - 40);
|
||||
uint8_t s = mhz19_response[5];
|
||||
if (s) {
|
||||
mhz19_type = 1;
|
||||
} else {
|
||||
mhz19_type = 2;
|
||||
}
|
||||
if (Mhz19CheckAndApplyFilter(ppm, s)) {
|
||||
p = mhz19_last_ppm;
|
||||
|
||||
if (0 == s || 64 == s) { // Reading is stable.
|
||||
if (mhz19_abc_must_apply) {
|
||||
mhz19_abc_must_apply = false;
|
||||
if (mhz19_abc_enable) {
|
||||
Serial.write(mhz19_cmnd_abc_enable, 9); // Sent sensor ABC Enable
|
||||
} else {
|
||||
Serial.write(mhz19_cmnd_abc_disable, 9); // Sent sensor ABC Disable
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
status = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
void Mhz19Init()
|
||||
{
|
||||
SetSerialBaudrate(MHZ19_BAUDRATE);
|
||||
Serial.flush();
|
||||
|
||||
seriallog_level = 0;
|
||||
mhz19_type = 1;
|
||||
}
|
||||
|
||||
#ifdef USE_WEBSERVER
|
||||
const char HTTP_SNS_CO2[] PROGMEM =
|
||||
"%s{s}%s " D_CO2 "{m}%d " D_UNIT_PPM "{e}"; // {s} = <tr><th>, {m} = </th><td>, {e} = </td></tr>
|
||||
#endif // USE_WEBSERVER
|
||||
|
||||
void Mhz19Show(boolean json)
|
||||
{
|
||||
uint16_t co2;
|
||||
float t;
|
||||
|
||||
if (Mhz19Read(co2, t)) {
|
||||
char temperature[10];
|
||||
dtostrfd(t, Settings.flag2.temperature_resolution, temperature);
|
||||
GetTextIndexed(mhz19_types, sizeof(mhz19_types), mhz19_type -1, kMhz19Types);
|
||||
|
||||
if (json) {
|
||||
snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s,\"%s\":{\"" D_CO2 "\":%d,\"" D_TEMPERATURE "\":%s}"), mqtt_data, mhz19_types, co2, temperature);
|
||||
#ifdef USE_DOMOTICZ
|
||||
DomoticzSensor(DZ_COUNT, co2);
|
||||
#endif // USE_DOMOTICZ
|
||||
#ifdef USE_WEBSERVER
|
||||
} else {
|
||||
snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_CO2, mqtt_data, mhz19_types, co2);
|
||||
snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_TEMP, mqtt_data, mhz19_types, temperature, TempUnit());
|
||||
#endif // USE_WEBSERVER
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*********************************************************************************************\
|
||||
* Interface
|
||||
\*********************************************************************************************/
|
||||
|
||||
#define XSNS_15
|
||||
|
||||
boolean Xsns15(byte function)
|
||||
{
|
||||
boolean result = false;
|
||||
|
||||
if ((pin[GPIO_MHZ_RXD] < 99) && (pin[GPIO_MHZ_TXD] < 99)) {
|
||||
switch (function) {
|
||||
case FUNC_XSNS_INIT:
|
||||
Mhz19Init();
|
||||
break;
|
||||
case FUNC_XSNS_PREP_BEFORE_TELEPERIOD:
|
||||
// Mhz19Prep();
|
||||
break;
|
||||
case FUNC_XSNS_JSON_APPEND:
|
||||
Mhz19Show(1);
|
||||
break;
|
||||
#ifdef USE_WEBSERVER
|
||||
case FUNC_XSNS_WEB_APPEND:
|
||||
Mhz19Show(0);
|
||||
// Mhz19Prep();
|
||||
break;
|
||||
#endif // USE_WEBSERVER
|
||||
}
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
#endif // USE_MHZ19_HARD_SERIAL
|
||||
|
|
@ -1,277 +0,0 @@
|
|||
/*
|
||||
xsns_15_mhz.ino - MH-Z19 CO2 sensor support for Sonoff-Tasmota
|
||||
|
||||
Copyright (C) 2017 Theo Arends
|
||||
|
||||
This program is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#ifdef USE_MHZ19_SOFT_SERIAL_OBSOLETE
|
||||
/*********************************************************************************************\
|
||||
* MH-Z19 - CO2 sensor
|
||||
*
|
||||
* Based on EspEasy plugin P049 by Dmitry (rel22 ___ inbox.ru)
|
||||
**********************************************************************************************
|
||||
* Filter usage
|
||||
*
|
||||
* Select filter usage on low stability readings
|
||||
\*********************************************************************************************/
|
||||
|
||||
#include <SoftwareSerial.h>
|
||||
SoftwareSerial *SoftSerial;
|
||||
|
||||
enum Mhz19FilterOptions {MHZ19_FILTER_OFF, MHZ19_FILTER_OFF_ALLSAMPLES, MHZ19_FILTER_FAST, MHZ19_FILTER_MEDIUM, MHZ19_FILTER_SLOW};
|
||||
|
||||
#define MHZ19_FILTER_OPTION MHZ19_FILTER_FAST
|
||||
|
||||
/*********************************************************************************************\
|
||||
* Source: http://www.winsen-sensor.com/d/files/infrared-gas-sensor/mh-z19b-co2-ver1_0.pdf
|
||||
*
|
||||
* Automatic Baseline Correction (ABC logic function)
|
||||
*
|
||||
* ABC logic function refers to that sensor itself do zero point judgment and automatic calibration procedure
|
||||
* intelligently after a continuous operation period. The automatic calibration cycle is every 24 hours after powered on.
|
||||
*
|
||||
* The zero point of automatic calibration is 400ppm.
|
||||
*
|
||||
* This function is usually suitable for indoor air quality monitor such as offices, schools and homes,
|
||||
* not suitable for greenhouse, farm and refrigeratory where this function should be off.
|
||||
*
|
||||
* Please do zero calibration timely, such as manual or commend calibration.
|
||||
\*********************************************************************************************/
|
||||
|
||||
#define MHZ19_ABC_ENABLE 1 // Automatic Baseline Correction (0 = off, 1 = on (default))
|
||||
|
||||
/*********************************************************************************************/
|
||||
|
||||
#define MHZ19_BAUDRATE 9600
|
||||
#define MHZ19_READ_TIMEOUT 600 // Must be way less than 1000
|
||||
|
||||
const char kMhz19Types[] PROGMEM = "MHZ19|MHZ19B";
|
||||
|
||||
const byte mhz19_cmnd_read_ppm[9] = {0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79};
|
||||
const byte mhz19_cmnd_abc_enable[9] = {0xFF, 0x01, 0x79, 0xA0, 0x00, 0x00, 0x00, 0x00, 0xE6};
|
||||
const byte mhz19_cmnd_abc_disable[9] = {0xFF, 0x01, 0x79, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86};
|
||||
|
||||
uint8_t mhz19_type = 0;
|
||||
uint16_t mhz19_last_ppm = 0;
|
||||
uint8_t mhz19_filter = MHZ19_FILTER_OPTION;
|
||||
byte mhz19_response[9];
|
||||
bool mhz19_abc_enable = MHZ19_ABC_ENABLE;
|
||||
bool mhz19_abc_must_apply = false;
|
||||
char mhz19_types[7];
|
||||
|
||||
bool Mhz19CheckAndApplyFilter(uint16_t ppm, uint8_t s)
|
||||
{
|
||||
if (1 == s) {
|
||||
return false; // S==1 => "A" version sensor bootup, do not use values.
|
||||
}
|
||||
if (mhz19_last_ppm < 400 || mhz19_last_ppm > 5000) {
|
||||
// Prevent unrealistic values during start-up with filtering enabled.
|
||||
// Just assume the entered value is correct.
|
||||
mhz19_last_ppm = ppm;
|
||||
return true;
|
||||
}
|
||||
int32_t difference = ppm - mhz19_last_ppm;
|
||||
if (s > 0 && s < 64 && mhz19_filter != MHZ19_FILTER_OFF) {
|
||||
// Not the "B" version of the sensor, S value is used.
|
||||
// S==0 => "B" version, else "A" version
|
||||
// The S value is an indication of the stability of the reading.
|
||||
// S == 64 represents a stable reading and any lower value indicates (unusual) fast change.
|
||||
// Now we increase the delay filter for low values of S and increase response time when the
|
||||
// value is more stable.
|
||||
// This will make the reading useful in more turbulent environments,
|
||||
// where the sensor would report more rapid change of measured values.
|
||||
difference = difference * s;
|
||||
difference /= 64;
|
||||
}
|
||||
switch (mhz19_filter) {
|
||||
case MHZ19_FILTER_OFF: {
|
||||
if (s != 0 && s != 64) {
|
||||
return false;
|
||||
}
|
||||
break;
|
||||
}
|
||||
// #Samples to reach >= 75% of step response
|
||||
case MHZ19_FILTER_OFF_ALLSAMPLES:
|
||||
break; // No Delay
|
||||
case MHZ19_FILTER_FAST:
|
||||
difference /= 2;
|
||||
break; // Delay: 2 samples
|
||||
case MHZ19_FILTER_MEDIUM:
|
||||
difference /= 4;
|
||||
break; // Delay: 5 samples
|
||||
case MHZ19_FILTER_SLOW:
|
||||
difference /= 8;
|
||||
break; // Delay: 11 samples
|
||||
}
|
||||
mhz19_last_ppm = static_cast<uint16_t>(mhz19_last_ppm + difference);
|
||||
return true;
|
||||
}
|
||||
|
||||
bool Mhz19Read(uint16_t &p, float &t)
|
||||
{
|
||||
bool status = false;
|
||||
|
||||
p = 0;
|
||||
t = NAN;
|
||||
|
||||
if (mhz19_type)
|
||||
{
|
||||
SoftSerial->flush();
|
||||
if (SoftSerial->write(mhz19_cmnd_read_ppm, 9) != 9) {
|
||||
return false; // Unable to send 9 bytes
|
||||
}
|
||||
memset(mhz19_response, 0, sizeof(mhz19_response));
|
||||
uint32_t start = millis();
|
||||
uint8_t counter = 0;
|
||||
while (((millis() - start) < MHZ19_READ_TIMEOUT) && (counter < 9)) {
|
||||
if (SoftSerial->available() > 0) {
|
||||
mhz19_response[counter++] = SoftSerial->read();
|
||||
} else {
|
||||
delay(10);
|
||||
}
|
||||
}
|
||||
if (counter < 9){
|
||||
return false; // Timeout while trying to read
|
||||
}
|
||||
|
||||
byte crc = 0;
|
||||
for (uint8_t i = 1; i < 8; i++) {
|
||||
crc += mhz19_response[i];
|
||||
}
|
||||
crc = 255 - crc;
|
||||
crc++;
|
||||
|
||||
/*
|
||||
// Test data
|
||||
mhz19_response[0] = 0xFF;
|
||||
mhz19_response[1] = 0x86;
|
||||
mhz19_response[2] = 0x12;
|
||||
mhz19_response[3] = 0x86;
|
||||
mhz19_response[4] = 64;
|
||||
// mhz19_response[5] = 32;
|
||||
mhz19_response[8] = crc;
|
||||
*/
|
||||
|
||||
if (0xFF == mhz19_response[0] && 0x86 == mhz19_response[1] && mhz19_response[8] == crc) {
|
||||
uint16_t u = (mhz19_response[6] << 8) | mhz19_response[7];
|
||||
if (15000 == u) { // During (and only ever at) sensor boot, 'u' is reported as 15000
|
||||
if (!mhz19_abc_enable) {
|
||||
// After bootup of the sensor the ABC will be enabled.
|
||||
// Thus only actively disable after bootup.
|
||||
mhz19_abc_must_apply = true;
|
||||
}
|
||||
} else {
|
||||
uint16_t ppm = (mhz19_response[2] << 8) | mhz19_response[3];
|
||||
t = ConvertTemp((float)mhz19_response[4] - 40);
|
||||
uint8_t s = mhz19_response[5];
|
||||
if (s) {
|
||||
mhz19_type = 1;
|
||||
} else {
|
||||
mhz19_type = 2;
|
||||
}
|
||||
if (Mhz19CheckAndApplyFilter(ppm, s)) {
|
||||
p = mhz19_last_ppm;
|
||||
|
||||
if (0 == s || 64 == s) { // Reading is stable.
|
||||
if (mhz19_abc_must_apply) {
|
||||
mhz19_abc_must_apply = false;
|
||||
if (mhz19_abc_enable) {
|
||||
SoftSerial->write(mhz19_cmnd_abc_enable, 9); // Sent sensor ABC Enable
|
||||
} else {
|
||||
SoftSerial->write(mhz19_cmnd_abc_disable, 9); // Sent sensor ABC Disable
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
status = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
void Mhz19Init()
|
||||
{
|
||||
SoftSerial = new SoftwareSerial(pin[GPIO_MHZ_RXD], pin[GPIO_MHZ_TXD]);
|
||||
SoftSerial->begin(9600);
|
||||
|
||||
|
||||
mhz19_type = 1;
|
||||
}
|
||||
|
||||
#ifdef USE_WEBSERVER
|
||||
const char HTTP_SNS_CO2[] PROGMEM =
|
||||
"%s{s}%s " D_CO2 "{m}%d " D_UNIT_PPM "{e}"; // {s} = <tr><th>, {m} = </th><td>, {e} = </td></tr>
|
||||
#endif // USE_WEBSERVER
|
||||
|
||||
void Mhz19Show(boolean json)
|
||||
{
|
||||
uint16_t co2;
|
||||
float t;
|
||||
|
||||
if (Mhz19Read(co2, t)) {
|
||||
char temperature[10];
|
||||
dtostrfd(t, Settings.flag2.temperature_resolution, temperature);
|
||||
GetTextIndexed(mhz19_types, sizeof(mhz19_types), mhz19_type -1, kMhz19Types);
|
||||
|
||||
if (json) {
|
||||
snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s,\"%s\":{\"" D_CO2 "\":%d,\"" D_TEMPERATURE "\":%s}"), mqtt_data, mhz19_types, co2, temperature);
|
||||
#ifdef USE_DOMOTICZ
|
||||
DomoticzSensor(DZ_COUNT, co2);
|
||||
#endif // USE_DOMOTICZ
|
||||
#ifdef USE_WEBSERVER
|
||||
} else {
|
||||
snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_CO2, mqtt_data, mhz19_types, co2);
|
||||
snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_TEMP, mqtt_data, mhz19_types, temperature, TempUnit());
|
||||
#endif // USE_WEBSERVER
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*********************************************************************************************\
|
||||
* Interface
|
||||
\*********************************************************************************************/
|
||||
|
||||
#define XSNS_15
|
||||
|
||||
boolean Xsns15(byte function)
|
||||
{
|
||||
boolean result = false;
|
||||
|
||||
if ((pin[GPIO_MHZ_RXD] < 99) && (pin[GPIO_MHZ_TXD] < 99)) {
|
||||
switch (function) {
|
||||
case FUNC_XSNS_INIT:
|
||||
Mhz19Init();
|
||||
break;
|
||||
case FUNC_XSNS_PREP_BEFORE_TELEPERIOD:
|
||||
// Mhz19Prep();
|
||||
break;
|
||||
case FUNC_XSNS_JSON_APPEND:
|
||||
Mhz19Show(1);
|
||||
break;
|
||||
#ifdef USE_WEBSERVER
|
||||
case FUNC_XSNS_WEB_APPEND:
|
||||
Mhz19Show(0);
|
||||
// Mhz19Prep();
|
||||
break;
|
||||
#endif // USE_WEBSERVER
|
||||
}
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
#endif // USE_MHZ19_SOFT_SERIAL_OBSOLETE
|
||||
Loading…
Reference in New Issue