DHT11 showing correct values in the Arduino IDE but 0 values in XOD

1

Something has been bugging me all day, when i program the Arduino in the Arduino IDE it gives me the right information but when i program the Arduino in XOD it gives me T = 0c and RH = 0% with the same setup and port number. I am using dht11-thermometer, text-lcd-16x2-i2c as my lcd has i2c and A0 as my port on the Arduino, i am also supplying the correct voltage to the DHT11 and LCD +5v. Does someone have the same problem

2

Hello!

Yes, some people report problems with DHT11 and I²C LCD working together. What board model do you use: Uno, Mega 2560, whatever?

Also, what model of DHT11 do you have? Can you see any values using watch’es?

3

Nkrkj thanks for your reply… I am using the uno and the dht11 is a Keyes with the resistor on the board… I will try what you mentioned when I get home from work later on today… don

4

This is what i have on watch in debug mode:

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5

Hmm… And is it an Uno, Nano, or Mega 2560?

6

nkrkv, yes its an UNO R3… I have a DHT22 on order. Since it’s more accurate i will be ditching the dht11 for the 22… In the mean time i have been going over the c code for the dht11/22 to see if there was an error and i might just create from scratch a new node for my dht going by the data sheet i downloaded…

7

I have the same setup & exact same results. DHT11, Mega 2650, LCD with I2C.
Arduino sketch display reasonable date temp & Humidity. XOD all zeros.

1 Like
8

I am assuming no one came up with a solution to this problem?
Just started using XOD and already have the exact same problem.

9

Hello! Indeed, DHTxx fails in XOD with some hardware combos. @evgenykochetkov recently found the root cause and fixed this bug in the master branch. Expect a new XOD release with the fix included in the nearest day or two.

If you can’t wait, replace C++ code of dhtxx-read-raw with https://github.com/xodio/xod/blob/6242766a3538c1aa9f250547366b14a26d21f6c4/workspace/__lib__/xod/common-hardware/dhtxx-read-raw/patch.cpp

10

Should be fixed with the release of XOD 0.25.0. Please, try it.

11

My DHT11 shows the right values but needs an additional clock pulse to work.

12

Am I understand correctly? The sensor does not read properly if UPD is left with the default “Continuously” value?

13

Yes.
I have connected a DHT11 to a Uno-Clone during lunchtime for a test at my workbench.
Continuously shows only 0.00 in the watch node.
When I use a a clock as trigger everything works fine.