Dht11 sensor error, i cant see anything in my screen

guys, someone know why the dht11 sensor dont work in my tbeam device? im connecting wrong or something? pls help :slightly_frowning_face:



You will need a multi-meter and a power source for a hardware debugging at least.

Some hins: First check if the sensor works by using an Arduino or something like that, then try to feed test signal into TTGO to see if the IO works as the firmware expected.

i tried in my arduino uno the sensors and it worked, idk why in my tbeam doesnt work or show anything? is there some other solutions?

Hi, hcorrea4

Good, you have confirmed that your sensor works, then lets trace down the problem on the other end. First you will want to confirm the power supply to the sensor is sufficiently delivered, the easiest way of doing this is by using a multi-meter.

If the power is correct, then you have supposedly working firmware that should register your sensors input and print out the value, here’s the hint for further debugging:

  1. use a oscilloscope to probe the sensor, to confirm it working under the power supplied by TTGO

  2. reading through the Meshtastic document about DH11, if it exist, and build a firmware and use Platform.io IDE to trace the DH11 code.

The first one might require extra equipment, you can consider buying a Analog Devices’ MK2000 or bring the board to a friend who’s willing to help. The second one require skills of a steep learning curve. Either way, you will gain knownledge, if you are working with Open Source something, or products from China…

The environmental monitoring code and documentation has been cleaned up a ton recently, works better and supports more cool sensors now. Environmental Measurement Plugin Settings | Meshtastic