mirror of https://github.com/arendst/Tasmota.git
134 lines
4.0 KiB
C++
134 lines
4.0 KiB
C++
/*
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xsns_72_mcp9808 - MCP9808 I2C temperature sensor support for Tasmota
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Copyright (C) 2021 Martin Wagner and 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_I2C
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#ifdef USE_MCP9808
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/*********************************************************************************************\
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* MCP9808 - Temperature Sensor
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*
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* I2C Address: 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F
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*
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\*********************************************************************************************/
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#define XSNS_72 72
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#define XI2C_51 51 // See I2CDEVICES.md
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#include "Adafruit_MCP9808.h"
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Adafruit_MCP9808 mcp9808 = Adafruit_MCP9808(); // create object copy
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#define MCP9808_MAX_SENSORS 8
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#define MCP9808_START_ADDRESS 0x18
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struct {
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char types[9] = "MCP9808";
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uint8_t count = 0;
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} mcp9808_cfg;
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struct {
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float temperature = NAN;
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uint8_t address;
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} mcp9808_sensors[MCP9808_MAX_SENSORS];
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/********************************************************************************************/
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float MCP9808Read(uint8_t addr) {
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float t = mcp9808.readTempC(addr);
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return t;
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}
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void MCP9808Detect(void) {
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for (uint8_t i = 0; i < MCP9808_MAX_SENSORS; i++) {
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if (!I2cSetDevice(MCP9808_START_ADDRESS + i)) { continue; }
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if (mcp9808.begin(MCP9808_START_ADDRESS + i)) {
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mcp9808_sensors[mcp9808_cfg.count].address = MCP9808_START_ADDRESS + i;
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I2cSetActiveFound(mcp9808_sensors[mcp9808_cfg.count].address, mcp9808_cfg.types);
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mcp9808.setResolution (mcp9808_sensors[mcp9808_cfg.count].address, 2); // Set Resolution to 0.125°C
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mcp9808_cfg.count++;
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}
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}
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}
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void MCP9808EverySecond(void) {
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for (uint32_t i = 0; i < mcp9808_cfg.count; i++) {
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float t = MCP9808Read(mcp9808_sensors[i].address);
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mcp9808_sensors[i].temperature = ConvertTemp(t);
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}
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}
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void MCP9808Show(bool json) {
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for (uint32_t i = 0; i < mcp9808_cfg.count; i++) {
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char sensor_name[11];
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strlcpy(sensor_name, mcp9808_cfg.types, sizeof(sensor_name));
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if (mcp9808_cfg.count > 1) {
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snprintf_P(sensor_name, sizeof(sensor_name), PSTR("%s%c%02X"), sensor_name, IndexSeparator(), mcp9808_sensors[i].address); // MCP9808-18, MCP9808-1A etc.
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}
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if (json) {
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ResponseAppend_P(JSON_SNS_F_TEMP, sensor_name, Settings->flag2.temperature_resolution, &mcp9808_sensors[i].temperature);
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if ((0 == TasmotaGlobal.tele_period) && (0 == i)) {
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#ifdef USE_DOMOTICZ
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DomoticzFloatSensor(DZ_TEMP, mcp9808_sensors[i].temperature);
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#endif // USE_DOMOTICZ
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#ifdef USE_KNX
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KnxSensor(KNX_TEMPERATURE, mcp9808_sensors[i].temperature);
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#endif // USE_KNX
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}
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#ifdef USE_WEBSERVER
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} else {
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WSContentSend_Temp(sensor_name, mcp9808_sensors[i].temperature);
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#endif // USE_WEBSERVER
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}
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}
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}
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/*********************************************************************************************\
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* Interface
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\*********************************************************************************************/
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bool Xsns72(uint32_t function)
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{
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if (!I2cEnabled(XI2C_51)) { return false; }
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bool result = false;
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if (FUNC_INIT == function) {
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MCP9808Detect();
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}
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else if (mcp9808_cfg.count){
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switch (function) {
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case FUNC_EVERY_SECOND:
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MCP9808EverySecond();
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break;
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case FUNC_JSON_APPEND:
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MCP9808Show(1);
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break;
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#ifdef USE_WEBSERVER
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case FUNC_WEB_SENSOR:
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MCP9808Show(0);
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break;
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#endif // USE_WEBSERVER
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}
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}
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return result;
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}
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#endif // USE_MCP9808
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#endif // USE_I2C
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