Add I2C bus2 support to LM75AD temperature sensor

arendst · Oct 21, 2023 · 6efe2ab · 6efe2ab
1 parent bec0c27
commit 6efe2ab
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Showing 4 changed files with 20 additions and 20 deletions.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -12,6 +12,7 @@ All notable changes to this project will be documented in this file.
 - I2C bus2 support to SHTxX temperature and humidity sensor
 - I2C bus2 support to HYTxxx temperature and humidity sensor
 - I2C bus2 support to SI1145/6/7 Ultra violet index and light sensor
+- I2C bus2 support to LM75AD temperature sensor
 
 ### Breaking Changed
 

diff --git a/I2CDEVICES.md b/I2CDEVICES.md
@@ -40,7 +40,7 @@ Index | Define | Driver | Device | Address(es) | Bus2 | Descrip
  19 | USE_SI1145 | xsns_24 | SI1145 | 0x60 | Yes | Ultra violet index and light sensor
  19 | USE_SI1145 | xsns_24 | SI1146 | 0x60 | Yes | Ultra violet index and light sensor
  19 | USE_SI1145 | xsns_24 | SI1147 | 0x60 | Yes | Ultra violet index and light sensor
- 20 | USE_LM75AD | xsns_26 | LM75AD | 0x48 - 0x4F |   | Temperature sensor
+ 20 | USE_LM75AD | xsns_26 | LM75AD | 0x48 - 0x4F | Yes | Temperature sensor
  21 | USE_APDS9960 | xsns_27 | APDS9960 | 0x39 | | Proximity ambient light RGB and gesture sensor
  22 | USE_MCP230xx | xsns_29 | MCP23008 | 0x20 - 0x26 | | 8-bit I/O expander
  22 | USE_MCP230xx | xsns_29 | MCP23017 | 0x20 - 0x26 | | 16-bit I/O expander

diff --git a/RELEASENOTES.md b/RELEASENOTES.md
@@ -120,6 +120,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl https://ota.tasm
 - I2C bus2 support to SHTxX temperature and humidity sensor
 - I2C bus2 support to HYTxxx temperature and humidity sensor
 - I2C bus2 support to SI1145/6/7 Ultra violet index and light sensor
+- I2C bus2 support to LM75AD temperature sensor
 
 ### Breaking Changed
 

diff --git a/tasmota/tasmota_xsns_sensor/xsns_26_lm75ad.ino b/tasmota/tasmota_xsns_sensor/xsns_26_lm75ad.ino
@@ -47,31 +47,30 @@
 
 bool lm75ad_type = false;
 uint8_t lm75ad_address;
+uint8_t lm75ad_bus;
 uint8_t lm75ad_addresses[] = { LM75AD_ADDRESS1, LM75AD_ADDRESS2, LM75AD_ADDRESS3, LM75AD_ADDRESS4, LM75AD_ADDRESS5, LM75AD_ADDRESS6, LM75AD_ADDRESS7, LM75AD_ADDRESS8 };
 
-void LM75ADDetect(void)
-{
- for (uint32_t i = 0; i < sizeof(lm75ad_addresses); i++) {
- lm75ad_address = lm75ad_addresses[i];
- if (!I2cSetDevice(lm75ad_address)) {
- continue; // do not make the next step without a confirmed device on the bus
- }
- uint16_t buffer;
- if (I2cValidRead16(&buffer, lm75ad_address, LM75_THYST_REGISTER)) {
- if (buffer == 0x4B00) {
- lm75ad_type = true;
- I2cSetActiveFound(lm75ad_address, "LM75AD");
- break;
+void LM75ADDetect(void) {
+ for (lm75ad_bus = 0; lm75ad_bus < 2; lm75ad_bus++) {
+ for (uint32_t i = 0; i < sizeof(lm75ad_addresses); i++) {
+ lm75ad_address = lm75ad_addresses[i];
+ if (!I2cSetDevice(lm75ad_address, lm75ad_bus)) { continue; } // do not make the next step without a confirmed device on the bus
+ uint16_t buffer;
+ if (I2cValidRead16(&buffer, lm75ad_address, LM75_THYST_REGISTER, lm75ad_bus)) {
+ if (buffer == 0x4B00) {
+ lm75ad_type = true;
+ I2cSetActiveFound(lm75ad_address, "LM75AD", lm75ad_bus);
+ return;
+ }
  }
  }
  }
 }
 
-float LM75ADGetTemp(void)
-{
+float LM75ADGetTemp(void) {
  int16_t sign = 1;
 
- uint16_t t = I2cRead16(lm75ad_address, LM75_TEMP_REGISTER);
+ uint16_t t = I2cRead16(lm75ad_address, LM75_TEMP_REGISTER, lm75ad_bus);
  if (t & 0x8000) { // we are getting a negative temperature value
  t = (~t) +0x20;
  sign = -1;
@@ -80,14 +79,13 @@ float LM75ADGetTemp(void)
  return ConvertTemp(sign * t * 0.125f);
 }
 
-void LM75ADShow(bool json)
-{
+void LM75ADShow(bool json) {
  float t = LM75ADGetTemp();
 
  if (json) {
  ResponseAppend_P(JSON_SNS_F_TEMP, "LM75AD", Settings->flag2.temperature_resolution, &t);
 #ifdef USE_DOMOTICZ
- if (0 == TasmotaGlobal.tele_period) DomoticzFloatSensor(DZ_TEMP, t);
+ if (0 == TasmotaGlobal.tele_period) { DomoticzFloatSensor(DZ_TEMP, t); }
 #endif // USE_DOMOTICZ
 #ifdef USE_WEBSERVER
  } else {