ESP8266 Community Forum

- Thu Apr 02, 2015 2:27 pm #13300 Hi,

I made a test with a DHT22 inside a dark box, uploading data every 15sec to thingspeak. Distance between DHT22 and ESP-01 was 4cm.

I tried powering the DHT22 from 3,3V output from AMS1113 with a 470uF cap. All the readings were very inaccurate, with +/- 2ºC temp and +/- up to 5% hum:

DHT22 3,3V

My next try was powering the DHT22 with 5V, using a simple resistor divider to communicate with the ESP-01. Data was really stable, with +/- 0,2ºC temp and +/- 1,5% hum:

DHT22 5V

Hope this helps.

- Fri Apr 03, 2015 8:03 am #13354 Very interesting information . I'm already sensors DHT due to interference surrendered . I got HTU21 , they still work perfectly . But even so it's nice that you tried it , thanks.

- Tue Jun 16, 2015 9:13 am #20597 Hi

Thanks for the code but I am not understanding the code. if you could slightly explain how the code works that could have been of great help to me. I am confused with the serial communication and how we are saving and reading the data from the GPIO2 .

Thank you.

- Wed Sep 30, 2015 11:59 pm #30231 I have 0.9.6 nodemcu
My readings:
Humidity: 0%
Temperature: -3276.7.2.9999999999272 deg C
Please help