Gandalf/OctoPrint-Enclosure
1
0
Fork 0
Code Issues 156 Pull Requests 6 Actions Packages Projects Releases 28 Wiki Activity

Changed README.md to new Adafruit_DHT library #450

Merged
DragRedSim merged 1 commits from master into master 2021-11-04 14:19:02 +00:00
Conversation 0 Commits 1 Files Changed 1 +6 -15
1 changed files with 6 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
README.md
View File

@@ -45,32 +45,23 @@ To control the enclosure temperature or get temperature triggered events, you ne
#### DHT11, DHT22 and AM2302 sensors
Wire the sensor following the wiring diagram on the pictures on thingiverse, you can use any GPIO pin.
Wire the sensor following the wiring diagram on the pictures on thingiverse; you can use any GPIO pin.
For DHT11 and DHT22 sensors, don't forget to connect a 4.7K - 10K resistor from the data pin to VCC. Also, be aware that DHT sensors some times can not work reliably on linux, this is a limitation of reading DHT sensors from Linux--there's no guarantee the program will be given enough priority and time by the Linux kernel to reliably read the sensor. Another common issue is the power supply. you need a constant and good 3.3V, sometimes a underpowered raspberry pi will not have a solid 3.3V power supply, so you could try powering the sensor with 5V and using a level shifter on the read pin.
You need to install Adafruit library to use the temperature sensor on raspberry pi.
You need to install the Adafruit library to use the temperature sensor on Raspberry Pi. Recent versions of this plugin have moved to supporting the CircuitPython-based library on Python3 installed below.
Open a raspberry pi terminal and type:
```
cd ~
git clone https://github.com/adafruit/Adafruit_Python_DHT.git
cd Adafruit_Python_DHT
pip3 install adafruit-circuitpython-dht
sudo apt-get update
sudo apt-get install build-essential python-dev python-openssl
sudo python setup.py install
sudo apt-get install libgpiod2 -y
```
Note: All libraries need to be installed on raspberry pi system python not octoprint virtual environment.
This will install all requirements of the library.
You can test the library by using:
```
cd examples
sudo ./AdafruitDHT.py 2302 4</code></pre>
```
Note that the first argument is the temperature sensor (11, 22, or 2302), and the second argument is the GPIO that the sensor was connected.
You can test the library by using the sample code from https://learn.adafruit.com/dht-humidity-sensing-on-raspberry-pi-with-gdocs-logging/python-setup.
#### DS18B20 sensor