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Fix SHT4x temperature and humidity sensor detection by reading unique serial nubmer #8525

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Merged
merged 1 commit into from
Nov 3, 2025
+6 −6
Merged

Fix SHT4x temperature and humidity sensor detection by reading unique serial nubmer #8525

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12 changes: 6 additions & 6 deletions src/detect/ScanI2CTwoWire.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -106,6 +106,7 @@ uint16_t ScanI2CTwoWire::getRegisterValue(const ScanI2CTwoWire::RegisterLocation
if (i2cBus->available())
i2cBus->read();
}
LOG_DEBUG("Register value: 0x%x", value);
return value;
}

Expand Down Expand Up @@ -377,14 +378,13 @@ void ScanI2CTwoWire::scanPort(I2CPort port, uint8_t *address, uint8_t asize)
}
case SHT31_4x_ADDR: // same as OPT3001_ADDR_ALT
case SHT31_4x_ADDR_ALT: // same as OPT3001_ADDR
registerValue = getRegisterValue(ScanI2CTwoWire::RegisterLocation(addr, 0x89), 2);
if (registerValue == 0x11a2 || registerValue == 0x11da || registerValue == 0x11f3 || registerValue == 0xe9c ||
registerValue == 0xc8d) {
type = SHT4X;
logFoundDevice("SHT4X", (uint8_t)addr.address);
} else if (getRegisterValue(ScanI2CTwoWire::RegisterLocation(addr, 0x7E), 2) == 0x5449) {
registerValue = getRegisterValue(ScanI2CTwoWire::RegisterLocation(addr, 0x7E), 2);
if (registerValue == 0x5449) {
type = OPT3001;
logFoundDevice("OPT3001", (uint8_t)addr.address);
} else if (getRegisterValue(ScanI2CTwoWire::RegisterLocation(addr, 0x89), 2) != 0) { // unique SHT4x serial number
type = SHT4X;
logFoundDevice("SHT4X", (uint8_t)addr.address);
} else {
type = SHT31;
logFoundDevice("SHT31", (uint8_t)addr.address);
Expand Down
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