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Add support for up to 16 LM75AD sensors

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This commit is contained in:
Theo Arends 2026-01-03 18:29:30 +01:00
parent 971ddc72e8
commit 756384db8c
2 changed files with 58 additions and 31 deletions
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3
tasmota/my_user_config.h
View File

@ -668,7 +668,8 @@
// #define USE_SGP4X // [I2cDriver82] Enable SGP41 sensor (I2C address 0x59) (+7k2 code)
// #define USE_SEN5X // [I2cDriver76] Enable SEN5X sensor (I2C address 0x69) (+3k code)
// #define USE_SI1145 // [I2cDriver19] Enable SI1145/46/47 sensor (I2C address 0x60) (+1k code)
// #define USE_LM75AD // [I2cDriver20] Enable LM75AD sensor (I2C addresses 0x48 - 0x4F) (+0k5 code)
// #define USE_LM75AD // [I2cDriver20] Enable LM75AD sensor (I2C addresses 0x48 - 0x4F) (+0k6 code)
// #define LM75AD_MAX_SENSORS 8 // Max number of LM75AD sensors supported (default = 8 on 2 busses, max = 16 on 2 busses)
// #define USE_APDS9960 // [I2cDriver21] Enable APDS9960 Proximity Sensor (I2C address 0x39). Disables SHT and VEML6070 (+4k7 code)
#define USE_APDS9960_GESTURE // Enable APDS9960 Gesture feature (+2k code)
#define USE_APDS9960_PROXIMITY // Enable APDS9960 Proximity feature (>50 code)

86
tasmota/tasmota_xsns_sensor/xsns_26_lm75ad.ino
View File

@ -29,47 +29,48 @@
\*********************************************************************************************/
#define XSNS_26 26
#define XI2C_20 20 // See I2CDEVICES.md
#define XI2C_20 20 // See I2CDEVICES.md
#define LM75AD_ADDRESS1 0x48
#define LM75AD_ADDRESS2 0x49
#define LM75AD_ADDRESS3 0x4A
#define LM75AD_ADDRESS4 0x4B
#define LM75AD_ADDRESS5 0x4C
#define LM75AD_ADDRESS6 0x4D
#define LM75AD_ADDRESS7 0x4E
#define LM75AD_ADDRESS8 0x4F
#ifndef LM75AD_MAX_SENSORS
#define LM75AD_MAX_SENSORS 8
#endif
#define LM75AD_ADDRESS 0x48 // Start address
#define LM75AD_COUNT 8 // Number of sequential addresses
#define LM75_TEMP_REGISTER 0x00
#define LM75_CONF_REGISTER 0x01
#define LM75_THYST_REGISTER 0x02
#define LM75_TOS_REGISTER 0x03
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 };
struct {
uint8_t address[LM75AD_MAX_SENSORS];
uint8_t bus[LM75AD_MAX_SENSORS];
uint8_t count;
} Lm75;
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
if ((LM75AD_MAX_SENSORS < 1) || (LM75AD_MAX_SENSORS > 16)) { return; } // Safeguard user changed LM75AD_MAX_SENSORS out of bounds
for (uint32_t bus = 0; bus < 2; bus++) {
for (uint32_t address = LM75AD_ADDRESS; address < LM75AD_ADDRESS + LM75AD_COUNT; address++) {
if (!I2cSetDevice(address, 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 (I2cValidRead16(&buffer, address, LM75_THYST_REGISTER, bus)) {
if (buffer == 0x4B00) {
lm75ad_type = true;
I2cSetActiveFound(lm75ad_address, "LM75AD", lm75ad_bus);
return;
I2cSetActiveFound(address, "LM75AD", bus);
Lm75.address[Lm75.count] = address;
Lm75.bus[Lm75.count] = bus;
Lm75.count++;
if (LM75AD_MAX_SENSORS == Lm75.count) { return; }
}
}
}
}
}
float LM75ADGetTemp(void) {
float LM75ADGetTemp(uint32_t sensor) {
uint16_t t;
if (I2cValidRead16(&t, lm75ad_address, LM75_TEMP_REGISTER, lm75ad_bus)) {
if (I2cValidRead16(&t, Lm75.address[sensor], LM75_TEMP_REGISTER, Lm75.bus[sensor])) {
int16_t sign = 1;
if (t & 0x8000) { // We are getting a negative temperature value
t = (~t) +0x20;
@ -82,17 +83,42 @@ float LM75ADGetTemp(void) {
}
void LM75ADShow(bool json) {
float t = LM75ADGetTemp();
for (uint32_t sensor = 0; sensor < Lm75.count; sensor++) {
float t = LM75ADGetTemp(sensor);
// if (!isnan(t)) {
char name[16];
// LM75AD
strlcpy(name, "LM75AD", sizeof(name));
if (Lm75.count > 1) {
// LM75AD-49
snprintf_P(name, sizeof(name), PSTR("%s%c%02X"), name, IndexSeparator(), Lm75.address[sensor]);
#ifdef USE_I2C_BUS2
if (TasmotaGlobal.i2c_enabled[1]) { // Second bus enabled
uint8_t bus = Lm75.bus[0];
for (uint32_t i = 1; i < Lm75.count; i++) {
if (bus != Lm75.bus[i]) { // Different busses
// LM75AD-49-1
snprintf_P(name, sizeof(name), PSTR("%s%c%d"), name, IndexSeparator(), Lm75.bus[sensor] +1);
break;
}
}
}
#endif // USE_I2C_BUS2
}
if (json) {
ResponseAppend_P(JSON_SNS_F_TEMP, "LM75AD", Settings->flag2.temperature_resolution, &t);
if (json) {
ResponseAppend_P(JSON_SNS_F_TEMP, name, Settings->flag2.temperature_resolution, &t);
#ifdef USE_DOMOTICZ
if (0 == TasmotaGlobal.tele_period) { DomoticzFloatSensor(DZ_TEMP, t); }
if ((0 == TasmotaGlobal.tele_period) && (0 == sensor)) {
DomoticzFloatSensor(DZ_TEMP, t);
}
#endif // USE_DOMOTICZ
#ifdef USE_WEBSERVER
} else {
WSContentSend_Temp("LM75AD", t);
} else {
WSContentSend_Temp(name, t);
#endif // USE_WEBSERVER
}
// }
}
}
@ -109,7 +135,7 @@ bool Xsns26(uint32_t function)
if (FUNC_INIT == function) {
LM75ADDetect();
}
else if (lm75ad_type) {
else if (Lm75.count) {
switch (function) {
case FUNC_JSON_APPEND:
LM75ADShow(1);