[solved] Unable to get DHT22 to work

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Hi,

I cant get the DHT22 sensor to work in pimatic, the dhtxx plugin cannot be installed, there’s always errors during installation, and it also doesn’t work with the homeduino plugin (I also use that plugin for sending 433mhz, that works).
Here’s the error in pimatic:

error [pimatic]: Error running "npm install pimatic-dhtxx"

The sensor worked fine with pilight (but I don’t use that anymore), and it works with a manual command:

pi@nanobox ~/lol_dht22 $ sudo ./loldht 3
Raspberry Pi wiringPi DHT22 reader
www.lolware.net
Humidity = 39.30 % Temperature = 20.80 *C
pi@nanobox ~/lol_dht22 $

I’m using the latest pimatic version and here’s some output from the debug log:

133 error node-dht-sensor@0.0.5 install: `node-gyp rebuild`
133 error Exit status 1
134 error Failed at the node-dht-sensor@0.0.5 install script.
134 error This is most likely a problem with the node-dht-sensor package,
134 error not with npm itself.
134 error Tell the author that this fails on your system:
134 error     node-gyp rebuild
134 error You can get their info via:
134 error     npm owner ls node-dht-sensor
134 error There is likely additional logging output above.
135 error System Linux 3.18.7+
136 error command "/usr/local/bin/node" "/usr/local/bin/npm" "install" "pimatic-dhtxx"
137 error cwd /home/pi/pimatic-app
138 error node -v v0.10.28
139 error npm -v 1.4.9
140 error code ELIFECYCLE

EDIT: sorry, I didn’t see the sub-board “troubleshooting”, this can be moved there

I found the cause now, I had to install the bcm2835 library on my Pi. This should be mentioned somewhere.
The library can be found here: http://www.airspayce.com/mikem/bcm2835/

@Ralf-H what version of linux are you running on your PI? I have installed 5 pimatic instance over the last few months (all raspbian) and never ran into this issue.

it’s raspbian, installed 09.2013, but frequently updated.

pi@nanobox ~ $ cat /etc/issue
Raspbian GNU/Linux 7 \n \l

pi@nanobox ~ $ uname -a
Linux nanobox 3.18.7+ #755 PREEMPT Thu Feb 12 17:14:31 GMT 2015 armv6l GNU/Linux

i get that error if i run npm install pimatic-dhtxx

I don´t found any about that errror.

yp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:267:23)
gyp ERR! stack     at ChildProcess.EventEmitter.emit (events.js:98:17)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (child_process.js:789:12)
gyp ERR! System Linux 3.18.7+
gyp ERR! command "node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /home/pimatic-app/node_modules/pimatic-dhtxx/node_modules/node-dht-sensor
gyp ERR! node -v v0.10.24
gyp ERR! node-gyp -v v0.12.1
gyp ERR! not ok
npm ERR! node-dht-sensor@0.0.5 install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-dht-sensor@0.0.5 install script.
npm ERR! This is most likely a problem with the node-dht-sensor package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node-gyp rebuild
npm ERR! You can get their info via:
npm ERR!     npm owner ls node-dht-sensor
npm ERR! There is likely additional logging output above.

npm ERR! System Linux 3.18.7+
npm ERR! command "/usr/local/bin/node" "/usr/local/bin/npm" "install" "pimatic-dhtxx"
npm ERR! cwd /home/pimatic-app
npm ERR! node -v v0.10.24
npm ERR! npm -v 1.3.21
npm ERR! code ELIFECYCLE
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR!     /home/pimatic-app/npm-debug.log
npm ERR! not ok code 0

I get help and now it works!
Thanks to Tomo

You must do this.

mkdir BCM2385
cd BCM2385/
wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.38.tar.gz
tar zxvf bcm2835-1.38.tar.gz
cd bcm2835-1.38/
sudo ./configure
make
sudo make check
sudo make install

Hey!
I had the same problems, but installing BCM2385 solved it, thx! The plugin works now but after 5-15 min pimatic crashes without any error in the logs. I removed first the sensor, same problem, then additionally removed the plugin out of the config and pimatic runs perfectly again… can you please fix the plugin? See here also: https://github.com/pimatic/pimatic/issues/583 but theres no description and no solution…

I have the same problem with the DHTxx plugin pimatic crashes after 5-15min, I don’t know if the plugin, pimatic or the BCM2385 is the problem.
So now I can’t read my DHT22 sensors

When you use homeduino with an Arduino, you can connect the DHT to the arduino too.
As long the bug isnt removed.

Now I used homeduino without Arduino because it works fine. The Arduino I ordered has delivered last week and I have a lot fun with it.
I have write my first little programs and I will connect it to my raspberry later

The DHTxx plugin leaks memory and therefore crashes pimatic. I tried to contact the plugin author wutu but with no luck, yet.

how’s the wiring for arduino nano? do i need to remove the resistor (4,7k)? i tried same wiring like on the pi with the resistor between data and 5v. doesn’t work so far… pin is D13 on arduino as set in the config

Any update on the memory leak of the DHTxx plugin yet? I noticed that Pimatic was crashing every 2,5 hours for me after switching from Pilight to DHTxx, and finally identified the plugin as the culprit (of course I didn’t find this thread before I figured it out ).

you can try the new DHT plugin
https://github.com/pimatic/pimatic-dht-sensors

I installed the new plugin yesterday, I’ll test it later that day.

But I got an error like “wiringpi.h: no such file or directory” while installing the ‘pimatic-dht-sensors’ plugin
so I installed WiringPi2-Python - et voilà, no problems while installing

https://github.com/WiringPi/WiringPi2-Python

edit: Already tried it, seems to work fine with my DHT11!
Thanks for the plugin, nice work

Thanks, the new plugin is working fine for me!