mirror of https://github.com/arendst/Tasmota.git
254 lines
7.6 KiB
C++
254 lines
7.6 KiB
C++
/*
|
|
Copyright (c) 2017 Theo Arends. All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
- Redistributions of source code must retain the above copyright notice,
|
|
this list of conditions and the following disclaimer.
|
|
- Redistributions in binary form must reproduce the above copyright notice,
|
|
this list of conditions and the following disclaimer in the documentation
|
|
and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifdef USE_DS18x20
|
|
/*********************************************************************************************\
|
|
* DS18B20 - Temperature
|
|
\*********************************************************************************************/
|
|
|
|
#define DS18S20_CHIPID 0x10
|
|
#define DS18B20_CHIPID 0x28
|
|
#define MAX31850_CHIPID 0x3B
|
|
|
|
#define W1_SKIP_ROM 0xCC
|
|
#define W1_CONVERT_TEMP 0x44
|
|
#define W1_READ_SCRATCHPAD 0xBE
|
|
|
|
#define DS18X20_MAX_SENSORS 8
|
|
|
|
#include <OneWire.h>
|
|
|
|
OneWire *ds = NULL;
|
|
|
|
uint8_t ds18x20_addr[DS18X20_MAX_SENSORS][8];
|
|
uint8_t ds18x20_idx[DS18X20_MAX_SENSORS];
|
|
uint8_t ds18x20_snsrs = 0;
|
|
char dsbstype[9];
|
|
|
|
void ds18x20_init()
|
|
{
|
|
ds = new OneWire(pin[GPIO_DSB]);
|
|
}
|
|
|
|
void ds18x20_search()
|
|
{
|
|
uint8_t num_sensors=0;
|
|
uint8_t sensor = 0;
|
|
uint8_t i;
|
|
|
|
ds->reset_search();
|
|
for (num_sensors = 0; num_sensors < DS18X20_MAX_SENSORS; num_sensors) {
|
|
if (!ds->search(ds18x20_addr[num_sensors])) {
|
|
ds->reset_search();
|
|
break;
|
|
}
|
|
// If CRC Ok and Type DS18S20, DS18B20 or MAX31850
|
|
if ((OneWire::crc8(ds18x20_addr[num_sensors], 7) == ds18x20_addr[num_sensors][7]) &&
|
|
((ds18x20_addr[num_sensors][0]==DS18S20_CHIPID) || (ds18x20_addr[num_sensors][0]==DS18B20_CHIPID) || (ds18x20_addr[num_sensors][0]==MAX31850_CHIPID))) {
|
|
num_sensors++;
|
|
}
|
|
}
|
|
for (int i = 0; i < num_sensors; i++) {
|
|
ds18x20_idx[i] = i;
|
|
}
|
|
for (int i = 0; i < num_sensors; i++) {
|
|
for (int j = i + 1; j < num_sensors; j++) {
|
|
if (uint32_t(ds18x20_addr[ds18x20_idx[i]]) > uint32_t(ds18x20_addr[ds18x20_idx[j]])) {
|
|
std::swap(ds18x20_idx[i], ds18x20_idx[j]);
|
|
}
|
|
}
|
|
}
|
|
ds18x20_snsrs = num_sensors;
|
|
}
|
|
|
|
uint8_t ds18x20_sensors()
|
|
{
|
|
return ds18x20_snsrs;
|
|
}
|
|
|
|
String ds18x20_address(uint8_t sensor)
|
|
{
|
|
char addrStr[20];
|
|
uint8_t i;
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
sprintf(addrStr+2*i, "%02X", ds18x20_addr[ds18x20_idx[sensor]][i]);
|
|
}
|
|
return String(addrStr);
|
|
}
|
|
|
|
void ds18x20_convert()
|
|
{
|
|
ds->reset();
|
|
ds->write(W1_SKIP_ROM); // Address all Sensors on Bus
|
|
ds->write(W1_CONVERT_TEMP); // start conversion, no parasite power on at the end
|
|
// delay(750); // 750ms should be enough for 12bit conv
|
|
}
|
|
|
|
float ds18x20_convertCtoF(float c)
|
|
{
|
|
return c * 1.8 + 32;
|
|
}
|
|
|
|
boolean ds18x20_read(uint8_t sensor, bool S, float &t)
|
|
{
|
|
byte data[12];
|
|
int8_t sign = 1;
|
|
uint8_t i = 0;
|
|
float temp9 = 0.0;
|
|
uint8_t present = 0;
|
|
|
|
t = NAN;
|
|
|
|
ds->reset();
|
|
ds->select(ds18x20_addr[ds18x20_idx[sensor]]);
|
|
ds->write(W1_READ_SCRATCHPAD); // Read Scratchpad
|
|
|
|
for (i = 0; i < 9; i++) {
|
|
data[i] = ds->read();
|
|
}
|
|
if (OneWire::crc8(data, 8) == data[8]) {
|
|
switch(ds18x20_addr[ds18x20_idx[sensor]][0]) {
|
|
case DS18S20_CHIPID: // DS18S20
|
|
/*
|
|
// App_note AN162.pdf page 9
|
|
int temp_lsb, temp_msb;
|
|
temp_msb = data[1]; // Sign byte + lsbit
|
|
temp_lsb = data[0]; // Temp data plus lsb
|
|
if (temp_msb <= 0x80) temp_lsb = (temp_lsb/2); // Shift to get whole degree
|
|
temp_msb = temp_msb & 0x80; // Mask all but the sign bit
|
|
if (temp_msb >= 0x80) { // Negative temperature
|
|
temp_lsb = (~temp_lsb)+1; // Twos complement
|
|
temp_lsb = (temp_lsb/2); // Shift to get whole degree
|
|
temp_lsb = ((-1)*temp_lsb); // Add sign bit
|
|
}
|
|
t = (int)temp_lsb; // Temperature in whole degree
|
|
*/
|
|
if (data[1] > 0x80) {
|
|
data[0] = (~data[0]) +1;
|
|
sign = -1; // App-Note fix possible sign error
|
|
}
|
|
if (data[0] & 1) {
|
|
temp9 = ((data[0] >> 1) + 0.5) * sign;
|
|
} else {
|
|
temp9 = (data[0] >> 1) * sign;
|
|
}
|
|
t = (temp9 - 0.25) + ((16.0 - data[6]) / 16.0);
|
|
if(S) {
|
|
t = ds18x20_convertCtoF(t);
|
|
}
|
|
break;
|
|
case DS18B20_CHIPID: // DS18B20
|
|
case MAX31850_CHIPID: // MAX31850
|
|
uint16_t temp12 = (data[1] << 8) + data[0];
|
|
if (temp12 > 2047) {
|
|
temp12 = (~temp12) +1;
|
|
sign = -1;
|
|
}
|
|
t = sign * temp12 * 0.0625;
|
|
if(S) {
|
|
t = ds18x20_convertCtoF(t);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return (!isnan(t));
|
|
}
|
|
|
|
/*********************************************************************************************\
|
|
* Presentation
|
|
\*********************************************************************************************/
|
|
|
|
void ds18x20_type(uint8_t sensor)
|
|
{
|
|
strcpy_P(dsbstype, PSTR("DS18x20"));
|
|
switch(ds18x20_addr[ds18x20_idx[sensor]][0]) {
|
|
case DS18S20_CHIPID:
|
|
strcpy_P(dsbstype, PSTR("DS18S20"));
|
|
break;
|
|
case DS18B20_CHIPID:
|
|
strcpy_P(dsbstype, PSTR("DS18B20"));
|
|
break;
|
|
case MAX31850_CHIPID:
|
|
strcpy_P(dsbstype, PSTR("MAX31850"));
|
|
break;
|
|
}
|
|
}
|
|
|
|
void ds18x20_mqttPresent(char* svalue, uint16_t ssvalue, uint8_t* djson)
|
|
{
|
|
char stemp1[10];
|
|
char stemp2[10];
|
|
float t;
|
|
|
|
byte dsxflg = 0;
|
|
for (byte i = 0; i < ds18x20_sensors(); i++) {
|
|
if (ds18x20_read(i, TEMP_CONVERSION, t)) { // Check if read failed
|
|
ds18x20_type(i);
|
|
dtostrf(t, 1, TEMP_RESOLUTION &3, stemp2);
|
|
if (!dsxflg) {
|
|
snprintf_P(svalue, ssvalue, PSTR("%s, \"DS18x20\":{"), svalue);
|
|
*djson = 1;
|
|
stemp1[0] = '\0';
|
|
}
|
|
dsxflg++;
|
|
snprintf_P(svalue, ssvalue, PSTR("%s%s\"DS%d\":{\"Type\":\"%s\", \"Address\":\"%s\", \"Temperature\":%s}"),
|
|
svalue, stemp1, i +1, dsbstype, ds18x20_address(i).c_str(), stemp2);
|
|
strcpy(stemp1, ", ");
|
|
#ifdef USE_DOMOTICZ
|
|
if (dsxflg == 1) domoticz_sensor1(stemp2);
|
|
#endif // USE_DOMOTICZ
|
|
}
|
|
}
|
|
if (dsxflg) {
|
|
snprintf_P(svalue, ssvalue, PSTR("%s}"), svalue);
|
|
}
|
|
}
|
|
|
|
#ifdef USE_WEBSERVER
|
|
String ds18x20_webPresent()
|
|
{
|
|
String page = "";
|
|
char stemp[10];
|
|
char stemp2[16];
|
|
char sensor[80];
|
|
float t;
|
|
|
|
for (byte i = 0; i < ds18x20_sensors(); i++) {
|
|
if (ds18x20_read(i, TEMP_CONVERSION, t)) { // Check if read failed
|
|
ds18x20_type(i);
|
|
dtostrf(t, 1, TEMP_RESOLUTION &3, stemp);
|
|
snprintf_P(stemp2, sizeof(stemp2), PSTR("%s-%d"), dsbstype, i +1);
|
|
snprintf_P(sensor, sizeof(sensor), HTTP_SNS_TEMP, stemp2, stemp, (TEMP_CONVERSION) ? 'F' : 'C');
|
|
page += sensor;
|
|
}
|
|
}
|
|
ds18x20_search(); // Check for changes in sensors number
|
|
ds18x20_convert(); // Start Conversion, takes up to one second
|
|
return page;
|
|
}
|
|
#endif // USE_WEBSERVER
|
|
#endif // USE_DS18x20
|