5.7 KiB
OctoPrint-Enclosure
This plugin is intended to control your printer enclosure using raspberry pi GPIO (At the moment this plugin only support raspberry pi).
You can control lights, fans and heaters of your enclosure. You can schedulle GPIOs to turn on and off after the print start or finish, so you can even switch your printer off after the print is complete. To use the heater you need to have a temperature sensor added to your enclosure connected to your raspberry pi. This plugin can support DHT11, DHT22, AM2302 and DS18B20 temperature sensors.
You can use relays or mosfets connected to the raspberry pi to control heaters, fans, lights or anything else.
For heating my enclosure I got a $15 lasko inside my encosure. I opened it and added a relay to the mains wire. If you’re uncomfortable soldering or dealing with high voltage, please check out the PowerSwitch Tail II. The PowerSwitch Tail II is fully enclosed, making it a lot safer.
CAUTION: VOLTAGE ON MAINS WIRE CAN KILL YOU, ONLY ATTEMPT TO DO THIS IF YOU KNOW WHAT YOU ARE DOING, AND DO AT YOUR OWN RISK
CAUTION 2: THIS HEATER IS NOT INTENDED TO FUNCTION THIS WAY AND IT MIGHT BE A FIRE HAZARD. DO IT AT YOUR OWN RISK
The relays module that I used can be found here. Those relays are active low, that means that they will turn on when you put LOW on the output of your pin. In orther to not fry your r-pi pay attention on your wiring connection: connect 3.3v to VCC, 5V to JD-VCC and Ground to GND.
Setup
Install via the bundled Plugin Manager or manually using this URL:
https://github.com/vitormhenrique/OctoPrint-Enclosure/archive/master.zip
Temperature Sensor
You can choose to use a DHT11, DHT22, AM2302 sensor or a DS18B20.
For the DHT11, DHT22 and AM2302 follow this steps:
You need to install Adafruit library to use the temperature sensor on raspberry pi.
Open raspberry pi terminal and type:
cd ~
git clone https://github.com/adafruit/Adafruit_Python_DHT.git
cd Adafruit_Python_DHT
sudo apt-get update
sudo apt-get install build-essential python-dev python-openssl
sudo python setup.py install
Than you can manually copy the scripts on your octopi rpi:
mkdir -p ~/.octoprint/plugins/OctoPrint-Enclosure/extras/
cd ~/.octoprint/plugins/OctoPrint-Enclosure/extras/
wget https://raw.githubusercontent.com/vitormhenrique/OctoPrint-Enclosure/master/extras/GetHumidity.py
wget https://raw.githubusercontent.com/vitormhenrique/OctoPrint-Enclosure/master/extras/GetTemperature.py
chmod +x ~/.octoprint/plugins/OctoPrint-Enclosure/extras/GetTemperature.py
chmod +x ~/.octoprint/plugins/OctoPrint-Enclosure/extras/GetHumidity.py
More info on Adafruit website
Note that sometimes you might see an error that the sensor can't be read even if you have your connections setup correctly. 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. This plugin will try to read enclosure temperature and humidity every 10 seconds, it will probably fail few times, but again, for the purpose this is ok.
For the DS18B20 sensor:
You need to enable your raspberry pi to use one-wire. You also NEED to use pin #4 to connect this type of sensor.
Follow instructions on website to connect and get the sensor working. After that you will need to change on the plugin settings to use the GetTemperature1820.py script to read the temperature and configure the the sensor type that you are using on this case is 1820. You also need to make the scripts executable:
If you have octoprint installed on the default location type:
mkdir -p ~/.octoprint/plugins/OctoPrint-Enclosure/extras/
cd ~/.octoprint/plugins/OctoPrint-Enclosure/extras/
wget https://raw.githubusercontent.com/vitormhenrique/OctoPrint-Enclosure/master/extras/GetTemperature1820.py
chmod +x ~/.octoprint/plugins/OctoPrint-Enclosure/extras/GetTemperature1820.py
Note that DS18B20 sensors will not provide information regarding humidity of the enclosure.
Filament sensor:
You have the hability to add a filament sensor to the enclosure, it will automatically pause the print if you run out of filament, I can be any type of filament sensor, the sensor should connect to ground if is set as an "active low" when the fillament run out or 3.3v if the sensor is set as "active high" when detected the end of filament, it does not matter if it is normally open or closed, that will only interfere on your wiring. I'm using the following sensor:
http://www.thingiverse.com/thing:1698397
GPIO
This release uses RPi.GPIO to control IO of raspberry pi, it should install and work automatically. If it doesn't please update your octoprint with the latest release of octopi.
Configuration
Default plugin configuration uses: Pin 4 connected to Temperature Sensor Pin 23 connected to the relay that controls the fan Pin 18 connected to the relay that controls the light Pin 17 connected to the relay that controls the heater Pin 24 connected to the fillament sensor
Those settings are configurable, as well the location of the python scripts to read temperature and humidity.
You can also enable and disable features off the plugin. For example disable the heater feature.