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Add optional define LM75AD_SKIP_NULL_SENSOR

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Theo Arends 2026-01-05 12:07:01 +01:00
parent 9ac1d09bab
commit 9451cf1cfd
1 changed files with 21 additions and 17 deletions
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38
tasmota/tasmota_xsns_sensor/xsns_26_lm75ad.ino
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@ -28,20 +28,22 @@
* I2C Address: 0x48 - 0x4F * I2C Address: 0x48 - 0x4F
\*********************************************************************************************/ \*********************************************************************************************/
#define XSNS_26 26 #define XSNS_26 26
#define XI2C_20 20 // See I2CDEVICES.md #define XI2C_20 20 // See I2CDEVICES.md
#ifndef LM75AD_MAX_SENSORS #ifndef LM75AD_MAX_SENSORS
#define LM75AD_MAX_SENSORS 8 #define LM75AD_MAX_SENSORS 8
#endif #endif
#define LM75AD_ADDRESS 0x48 // Start address //#define LM75AD_SKIP_NULL_SENSOR // Skip sensor instead of reporting null value
#define LM75AD_COUNT 8 // Number of sequential addresses
#define LM75_TEMP_REGISTER 0x00 #define LM75AD_ADDRESS 0x48 // Start address
#define LM75_CONF_REGISTER 0x01 #define LM75AD_COUNT 8 // Number of sequential addresses
#define LM75_THYST_REGISTER 0x02
#define LM75_TOS_REGISTER 0x03 #define LM75_TEMP_REGISTER 0x00
#define LM75_CONF_REGISTER 0x01 // Power On State is 0x00
#define LM75_THYST_REGISTER 0x02 // Power On state is 0x4B00 = 75C - Used for I2C device detection
#define LM75_TOS_REGISTER 0x03 // Power On State is 0x5000 = 80C
struct { struct {
uint8_t address[LM75AD_MAX_SENSORS]; uint8_t address[LM75AD_MAX_SENSORS];
@ -53,7 +55,7 @@ void LM75ADDetect(void) {
if ((LM75AD_MAX_SENSORS < 1) || (LM75AD_MAX_SENSORS > 16)) { return; } // Safeguard user changed LM75AD_MAX_SENSORS out of bounds 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 bus = 0; bus < 2; bus++) {
for (uint32_t address = LM75AD_ADDRESS; address < LM75AD_ADDRESS + LM75AD_COUNT; address++) { 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 if (!I2cSetDevice(address, bus)) { continue; } // Do not make the next step without a confirmed device on the bus
uint16_t buffer; uint16_t buffer;
if (I2cValidRead16(&buffer, address, LM75_THYST_REGISTER, bus)) { if (I2cValidRead16(&buffer, address, LM75_THYST_REGISTER, bus)) {
if (buffer == 0x4B00) { if (buffer == 0x4B00) {
@ -72,14 +74,14 @@ float LM75ADGetTemp(uint32_t sensor) {
uint16_t t; uint16_t t;
if (I2cValidRead16(&t, Lm75.address[sensor], LM75_TEMP_REGISTER, Lm75.bus[sensor])) { if (I2cValidRead16(&t, Lm75.address[sensor], LM75_TEMP_REGISTER, Lm75.bus[sensor])) {
int16_t sign = 1; int16_t sign = 1;
if (t & 0x8000) { // We are getting a negative temperature value if (t & 0x8000) { // We are getting a negative temperature value
t = (~t) +0x20; t = (~t) +0x20;
sign = -1; sign = -1;
} }
t = t >> 5; // Shift value into place (5 LSB not used) t = t >> 5; // Shift value into place (5 LSB not used, expect 11-bit resolution)
return ConvertTemp(sign * t * 0.125f); return ConvertTemp(sign * t * 0.125f);
} }
return NAN; // Will be changed to "null" by ext_vsprintf_P() return NAN; // Will be changed to "null" by ext_vsprintf_P()
} }
void LM75ADShow(bool json) { void LM75ADShow(bool json) {
@ -87,6 +89,9 @@ void LM75ADShow(bool json) {
for (uint32_t sensor = 0; sensor < Lm75.count; sensor++) { for (uint32_t sensor = 0; sensor < Lm75.count; sensor++) {
// Takes 2ms / LM75 // Takes 2ms / LM75
float t = LM75ADGetTemp(sensor); float t = LM75ADGetTemp(sensor);
#ifdef LM75AD_SKIP_NULL_SENSOR
if (isnan(t)) { continue; } // Skip sensor instead of reporting null value
#endif // LM75AD_SKIP_NULL_SENSOR
char name[16]; char name[16];
strlcpy(name, "LM75AD", sizeof(name)); // LM75AD strlcpy(name, "LM75AD", sizeof(name)); // LM75AD
@ -118,8 +123,7 @@ void LM75ADShow(bool json) {
* Interface * Interface
\*********************************************************************************************/ \*********************************************************************************************/
bool Xsns26(uint32_t function) bool Xsns26(uint32_t function) {
{
if (!I2cEnabled(XI2C_20)) { return false; } if (!I2cEnabled(XI2C_20)) { return false; }
bool result = false; bool result = false;
@ -132,11 +136,11 @@ bool Xsns26(uint32_t function)
case FUNC_JSON_APPEND: case FUNC_JSON_APPEND:
LM75ADShow(1); LM75ADShow(1);
break; break;
#ifdef USE_WEBSERVER #ifdef USE_WEBSERVER
case FUNC_WEB_SENSOR: case FUNC_WEB_SENSOR:
LM75ADShow(0); LM75ADShow(0);
break; break;
#endif // USE_WEBSERVER #endif // USE_WEBSERVER
} }
} }
return result; return result;