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Add I2C temperature sensor LM75AD 

6.0.0a
* Add support for I2C temperature sensor LM75AD (#2909)
This commit is contained in:
Theo Arends 2018-06-05 16:14:00 +02:00
parent 006a747d10
commit 43dd708413
3 changed files with 31 additions and 22 deletions
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1
sonoff/_releasenotes.ino
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@ -1,6 +1,7 @@
/* 6.0.0a
* Add CRC to Settings making future upgrades more fail-safe
* Add support for uploading Sonoff Bridge firmware found in tools/fw_efm8bb1 folder build by Portisch using Web Gui File Upload (#2886)
* Add support for I2C temperature sensor LM75AD (#2909)
* Add command RfRaw to control Portisch firmware features
* Remove version 3, 4 and pre 5.2 settings auto-upgrade. See https://github.com/arendst/Sonoff-Tasmota/wiki/Upgrade#migration-path
* Change default CFG_HOLDER from 0x20161209 to 4617 (=0x1209) - no impact on default upgrades

1
sonoff/user_config.h
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@ -263,6 +263,7 @@
#define USE_SHT // Add I2C emulating code for SHT1X sensor (+1k4 code)
#define USE_SHT3X // Add I2C code for SHT3x or SHTC3 sensor (+0k7 code)
#define USE_HTU // Add I2C code for HTU21/SI7013/SI7020/SI7021 sensor (+1k5 code)
#define USE_LM75AD // Add I2C code for LM75AD sensor (+0k5 code)
#define USE_BMP // Add I2C code for BMP085/BMP180/BMP280/BME280 sensor (+4k code)
// #define USE_BME680 // Add additional support for BME680 sensor using Adafruit Sensor and BME680 libraries (+6k code)
#define USE_SGP30 // Add I2C code for SGP30 sensor (+1k1 code)

51
sonoff/xsns_26_lm75ad.ino
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@ -1,7 +1,7 @@
/*
xdrv_26_lm75ad.ino - Support for I2C LM75AD Temperature Sensor
xsns_26_lm75ad.ino - Support for I2C LM75AD Temperature Sensor
Copyright (C) 2018 Theo Arends
Copyright (C) 2018 Andre Thomas and 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
@ -21,7 +21,11 @@
#ifdef USE_LM75AD
/*********************************************************************************************\
* LM75AD
* LM75AD - Temperature
*
* Docs at https://www.nxp.com/docs/en/data-sheet/LM75A.pdf
*
* I2C Address: 0x48 - 0x4F
\*********************************************************************************************/
#define LM75AD_ADDRESS1 0x48
@ -56,7 +60,7 @@ void LM75ADDetect()
}
for (byte i = 0; i < sizeof(lm75ad_addresses); i++) {
lm75ad_address = lm75ad_addresses[i];
if (I2cValidRead8(&buffer,lm75ad_address,LM75_CONF_REGISTER)) {
if (I2cValidRead8(&buffer, lm75ad_address, LM75_CONF_REGISTER)) {
lm75ad_type = 1;
snprintf_P(log_data, sizeof(log_data), S_LOG_I2C_FOUND_AT, "LM75AD", lm75ad_address);
AddLog(LOG_LEVEL_DEBUG);
@ -67,34 +71,37 @@ void LM75ADDetect()
float LM75ADConvertTemp(uint16_t t) {
float tmpt;
int16_t sign = 1;
if (t & 0x8000) { // we are getting a negative temperature value
t=t<<1; // shift out the MSB
t=t>>6; // shift value into place (5 LSB not used + the MSB we shifted out to make it zero)
tmpt=t*0.125*-1;
} else { // we're getting a positive value
t=t>>5; // shift value into place (5 LSB not used)
tmpt=t*0.125;
}
if (!isnan(tmpt) && Settings.flag.temperature_conversion) {
tmpt = tmpt * 1.8 + 32; // Fahrenheit
t = (~t) +0x20;
sign = -1;
}
t = t >> 5; // shift value into place (5 LSB not used)
tmpt = ConvertTemp(sign * t * 0.125);
return tmpt;
}
void LM75ADShow(boolean json)
{
if (lm75ad_type) {
char temperature[10];
uint16_t lm75ad_value = LM75ADGetTempRegister();
float t=LM75ADConvertTemp(lm75ad_value);
dtostrfd(t, Settings.flag2.temperature_resolution, temperature);
if (json) {
snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s,\"LM75AD\":{\"" D_JSON_TEMPERATURE "\":%s}"), mqtt_data, temperature);
char temperature[10];
uint16_t lm75ad_value = LM75ADGetTempRegister();
float t = LM75ADConvertTemp(lm75ad_value);
dtostrfd(t, Settings.flag2.temperature_resolution, temperature);
if (json) {
snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s,\"LM75AD\":{\"" D_JSON_TEMPERATURE "\":%s}"), mqtt_data, temperature);
#ifdef USE_DOMOTICZ
if (0 == tele_period) DomoticzSensor(DZ_TEMP, temperature);
#endif // USE_DOMOTICZ
#ifdef USE_WEBSERVER
} else {
snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_TEMP, mqtt_data, "LM75AD", temperature, TempUnit());
} else {
snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_TEMP, mqtt_data, "LM75AD", temperature, TempUnit());
#endif // USE_WEBSERVER
}
}
}
}