Problem: wrong values at negative temperatures an ESP8266 and DHT22 #178
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Tested on esp32 Devkitv1. with an aliexpress DHT22 (the product page says AM2302 but no branding on the sensor) |
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I have the same issue. However, I suggest to look at this PR before merging this one: arendst/Tasmota#14173 |
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Problem is described in #177
Solution:
shift incomming data on int16_t variable before cast to float.
I could test this solution only on Arduino IDE 1.8.13 with ESP8266 / DHT 22.
Maybe testing on other controllers / dht types could be necessery