DHT22 Issues

[medelec35]

Hello.
We are aware of DHT22 issues.
If fixed for some target devices, it will not work on others.
I have got a temporary solution for people to try.

I have added an additional property called Check Threshold to allow the DHT22 to work on more devices
If you can't get it to work, I also have also got a debug version that will show you the range in which the Check Threshold should be set at for the component to work.
You can ask for that version, and I will post it

For the 16F18877 the range is very tight.
Here are values for some target devices:
Arduino 165 - 181
TTGO 157 - 177
16F18877 196 -197

Browse to this location using file explorer , it's hidden by default so just paste the link into your address bar.

Code: Select all

C:\ProgramData\MatrixTSL\FlowcodeV10\Components

Place the attached component.
If Flowcode is already open, then you will need to reload your project for the new component to work
If you run any component updates, then the component you added will be overwritten, so it will stop working again.

I hope this helps as a temporary fix.
If this does work for your target devices, then I will make the same changes for the Grove version.

[jgu1]

Hi Martin!

Thank´s I test tomorrow.

Jorgen

[jgu1]

Hi Martin!

I have perform some test with arduino and a Pic16F876 with your new component.

Arduino: it work with your recommended setting, but it is unstable, sometime it stop work and sometime the display show for the Hum -3247,5 after some second it run again.

Pic16f875 20mHz not possible to get i work no matter what the setting, value is set.

If I in update roll back to the "Grove DHT22 and DHT22" ver. 3 it work stable for both, Arduino and Pic. Maybe you could have a look in the ver. 3 component

I have not test the other devices.

If I can help you,let me know.

Jorgen

[medelec35]

Hi Jorgen.
Sorry for the delay.
Can you and anyone else who has a DHT22, try the attached component please?

Instructions can be found here for anyone who have not added a component yet.

For me, the updated component is working on the Arduino Uno, ESP32 Lolin and 16F18877 at 19MHz and above.

[jgu1]

Hi Martin!

No probs

Perform a test and you hear

Jorgen

[medelec35]

Thanks Jorgen.
We put a fair bit of time and effort into it, especially Steve.
Fingers crossed.

[jgu1]

Hi again!

I have two testboard up running with the DHT22 not the Grove. One with Pic16f876 20 mHz and one with an Arduino Uno.

Just perform a test with these devices, working perfect now

I have not test the other devices, if no other do, I can do it later

As always, thank´s for your and Steve´s job, well done. Push it to update.

By the way, think it is long time we have heard from Benj, hopefully he still work for MM?

Br jorgen

[Steve-Matrix]

By the way, think it is long time we have heard from Benj, hopefully he still work for MM?

Yes - Ben is still here, but splitting his time amongst many different projects.