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Updated Sonoff Th (markdown)

Georgex12 2019-03-09 13:30:20 +01:00
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Sonoff-Th.md

@ -26,7 +26,7 @@ Sonoff sells 3 sensors with 2.5mm jack to use with the Sonoff Th. Sonoff TH Sens
Tasmota supports Sonoff Th with all three Sonoff sensors. Sonoff Si7021 / Sonoff TH Sensor-AM2301 / Sonoff Temp Sensor-DS18B20. Just choose o the web interface Sonoff Th and select under GPIO14 the sensor you have connected.
**NOT SUPPORTED up to now:** The Si7021 contains an integrated resistive heating element that may be used to drive off condensation. It's recommend enabling the heater when the humidity readings are >80%. Humidity readings >80% become very unreliable. If the "Sonoff Si7021 sensor" is used at the dew point and condensation occurs on the sensor, the on-chip heater could be activated to dry the sensor and restore operation once the sensor is above the dew point. Turning on the heater will also reduce the tendency of the humidity sensor to accumulate an offset due to "memory" of sustained high humidity conditions. 6 different power levels are available. The maximum source current of a GPIO pin on an Esp8266 is about 12mA. So the first power level of 3.09mA and secound power level of 9.18mA would be theoretically possible.
**NOT SUPPORTED up to now:** The Si7021 contains an integrated resistive heating element that may be used to drive off condensation. It's recommend enabling the heater when the humidity readings are >80%. Humidity readings >80% become very unreliable. If the "Sonoff Si7021 sensor" is used at the dew point and condensation occurs on the sensor, the on-chip heater could be activated to dry the sensor and restore operation once the sensor is above the dew point. Turning on the heater will also reduce the tendency of the humidity sensor to accumulate an offset due to "memory" of sustained high humidity conditions. 6 different power levels are available. The maximum source current of a GPIO pin on an Esp8266 is about 12mA. So the first power level of 3.09mA and second power level of 9.18mA would be theoretically usable.
Keep that in mind if you use this "Sonoff Si7021 sensor" outdoors ! Maybe in the future Tasmota finds also a way to support the important heater feature of a "Sonoff Si7021 sensor" .