<![CDATA[Humidity/Temp Sensor Issues]]>This is my second humidity sensor.

I keep getting the same error.
Failed reading temperature from DHT
Failed reading humidity from DHT

  1. I have tried 4 different DHT22 and even the one off my working Humidity sensor
  2. I have tried 5 different mini pros with only my original working..
  3. My original has a blue LED but the others were ordered in a ten pack and have red LED.
  4. Some of the red LED mini pro will only connect @ 57600 while others and blue LED connect @ 115200
  5. Changing the input pin for the DHT22 makes no difference.

Do I just have a bunch of bad Mini Pros or am I missing something?

FullSizeRender_1.jpg FullSizeRender_2.jpg FullSizeRender.jpg

]]>https://forum.mysensors.org/topic/1035/humidity-temp-sensor-issuesRSS for NodeThu, 11 Jun 2026 17:14:14 GMTWed, 25 Feb 2015 06:03:01 GMT60<![CDATA[Reply to Humidity/Temp Sensor Issues on Thu, 26 Feb 2015 19:42:44 GMT]]>I've a sensor running with naked 328p, 3.3V, 8 MHz internal Osz and DHT22. Maybe I'm lucky?!

]]>https://forum.mysensors.org/post/10744https://forum.mysensors.org/post/10744Thu, 26 Feb 2015 19:42:44 GMT<![CDATA[Reply to Humidity/Temp Sensor Issues on Thu, 26 Feb 2015 19:33:56 GMT]]>Problem with dht22 and ds18b20.
It looks likes a programmation beceause i just switch from arduino pro 3.3 to a 5.5 on my mys1.1 board and it works fine.
Or it s really a problem of manufacturing ...

]]>https://forum.mysensors.org/post/10740https://forum.mysensors.org/post/10740Thu, 26 Feb 2015 19:33:56 GMT<![CDATA[Reply to Humidity/Temp Sensor Issues on Thu, 26 Feb 2015 18:35:44 GMT]]>@ludoarchi said:

I have a similar problem with a pack of 10 pro mini 3,3v bought at the ebay link from mysensor ?

Only problem with humidiy sensor or a more general problem?

Googling 3.3v dht22 giver a lot of results. E.g.
http://forum.arduino.cc/index.php?topic=269216.0

]]>https://forum.mysensors.org/post/10736https://forum.mysensors.org/post/10736Thu, 26 Feb 2015 18:35:44 GMT<![CDATA[Reply to Humidity/Temp Sensor Issues on Thu, 26 Feb 2015 18:00:23 GMT]]>I have a similar problem with a pack of 10 pro mini 3,3v bought at the ebay link from mysensor ?
But every think is ok with pro mini 5.5v ...
I tried many things but it still do not work ?
Other people with same problem ?
Ideas ?
Thinks

]]>https://forum.mysensors.org/post/10733https://forum.mysensors.org/post/10733Thu, 26 Feb 2015 18:00:23 GMT<![CDATA[Reply to Humidity/Temp Sensor Issues on Thu, 26 Feb 2015 03:40:51 GMT]]>@BulldogLowell Yes. I put one 4.7uf for the radio and one for the DHT22 with no change. Over two days I did get it to read the DHT22 once out of 1000 or so reads and that was with out any capacitors.. Reading every 5 seconds

]]>https://forum.mysensors.org/post/10675https://forum.mysensors.org/post/10675Thu, 26 Feb 2015 03:40:51 GMT<![CDATA[Reply to Humidity/Temp Sensor Issues on Wed, 25 Feb 2015 23:37:56 GMT]]>@FUZNUTS

have you tried to put a cap on the DHT's Vcc and ground??

]]>https://forum.mysensors.org/post/10674https://forum.mysensors.org/post/10674Wed, 25 Feb 2015 23:37:56 GMT<![CDATA[Reply to Humidity/Temp Sensor Issues on Wed, 25 Feb 2015 22:57:00 GMT]]>@Salmoides 5v regulated into raw comes out 4.52v on vcc

]]>https://forum.mysensors.org/post/10672https://forum.mysensors.org/post/10672Wed, 25 Feb 2015 22:57:00 GMT<![CDATA[Reply to Humidity/Temp Sensor Issues on Wed, 25 Feb 2015 12:46:30 GMT]]>When you apply voltage to the RAW pin, do you get 5v out of Vcc?

]]>https://forum.mysensors.org/post/10655https://forum.mysensors.org/post/10655Wed, 25 Feb 2015 12:46:30 GMT<![CDATA[Reply to Humidity/Temp Sensor Issues on Wed, 25 Feb 2015 08:17:28 GMT]]>these are all 5.5v 16mhz or at least that's what they say..lol
ill try leaving it set up on the gateway and see what happens with fingers crossed

]]>https://forum.mysensors.org/post/10648https://forum.mysensors.org/post/10648Wed, 25 Feb 2015 08:17:28 GMT<![CDATA[Reply to Humidity/Temp Sensor Issues on Wed, 25 Feb 2015 07:31:52 GMT]]>Perhaps your minis are 3.3v 8 Mhz and you selected 5v 16 Mhz in the IDE?

]]>https://forum.mysensors.org/post/10645https://forum.mysensors.org/post/10645Wed, 25 Feb 2015 07:31:52 GMT<![CDATA[Reply to Humidity/Temp Sensor Issues on Wed, 25 Feb 2015 07:21:57 GMT]]>Mine was doing the same thing when I had it plugged into my laptop while viewing the serial monitor. Once I connected it to my Gateway and into Vera, all is working. I got really frustrated at this, but it just seemed like it wanted to be connected to something first.
Sorry, probably not much help, but thought I would share my experience.

]]>https://forum.mysensors.org/post/10643https://forum.mysensors.org/post/10643Wed, 25 Feb 2015 07:21:57 GMT