MMM-DHT22 Humidity and Temperature Module

trividar

Hi guys

I have some problems with this module. I test it with two DHT22 and I have always the same strange thing. Please look my short clip: [Youtube](video: https://youtu.be/gvuq6A13fw8). Sometimes it shows quickly the exact Temp and sometimes strange values but most of the time it shows undefined. I try to made a skipt outside of the MM and in this picture (link) you can see , at the same time my skript shows the right value but in MM its undefined.
Can someone test this module or help me to find the fault? THX a lot for any help!

Bangee

What’s the result when you try this command directli in your terminal:

go to cd MagicMirror/modules/MMM-DHT22/

sudo ./dht_var 2

Replace 2 with your sensor Pin

I’ve tested this on two different Pi’s

trividar

@Bangee ok, now I’m confused ;o)
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The first 5 lines I tried during my MM was working but nothing happend, i had to wait 2 minutes and it shows just a new comment line. After i stopped my MM it was working like a charm (last two lines). What I’m doing wrong?..

Bangee

I don’t now atm :-)

it looks like something is blocking the dht_var script when your MM is running

Do you have error in your MM logs?

trividar

I just checkt it and I don’t have any errors …;o(

Bangee

I’ve tried this on an other pi and it works …

can you uncomment line 33 in node_helper.js to check if he tries to write something in to the logs?

	console.log("Log: " + temp + " - " + hum);

trividar

THX @Bangee for your help. Now i got this error:

Error

yawns

Right. Please replace the word temp with arr[1] and hum with arr[0] in line 33 in node_helper.js

trividar

Now my logs looks like this after I changed line 33:

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yawns

Okay, so it definitely fails retrieving data from the sensor, but the error handling does not catch this failure.