https://github.com/roccomuso/rpi-fan

Basic Node.js Fan controller for Raspberry Pi.
https://github.com/roccomuso/rpi-fan

circuit-scheme fan node nodejs raspberry-pi temperature transistor

Last synced: about 1 year ago
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Basic Node.js Fan controller for Raspberry Pi.

• Host: GitHub
• URL: https://github.com/roccomuso/rpi-fan
• Owner: roccomuso
• Created: 2015-12-11T01:47:20.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2016-09-24T11:49:28.000Z (almost 10 years ago)
• Last Synced: 2025-03-24T15:11:24.421Z (over 1 year ago)
• Topics: circuit-scheme, fan, node, nodejs, raspberry-pi, temperature, transistor
• Language: JavaScript
• Size: 449 KB
• Stars: 4
• Watchers: 4
• Forks: 2
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

          
# rpi-fan

## Basic Node.js Fan controller for Raspberry Pi.

When The temperature reachs a specific threshold value, the gpio is activated and the transistor lets the fan spin!

You can see the current RPi temperature and Fan status using the built-in server functionality or installing the basic RPi-Dashboard: https://github.com/roccomuso/rpi-dashboard

Once the fan starts to spin, there will not be a temperature check for 5 minutes. This behavior avoids too many fan switches in short periods of time.

## Hardware

1. Scheme (works on both Raspberry Pi and Raspberry Pi 2 model):

![circuit scheme](https://github.com/roccomuso/rpi-fan/blob/master/img/scheme.png "Circuit Scheme")

For Raspberry Pi pinout, check out https://www.raspberrypi.org/documentation/usage/gpio-plus-and-raspi2/

2. Recommended Transistor: 2N7000

3. Recommended Fan: 5V - 0.2A

## Software

### Configuration

1. You can edit the gpio number, temperature threshold, refresh time etc. directly in the config.json file:

        "PIN_NUMBER" : 18,

        "REFRESH_TIME" : 60,

        "TEMPERATURE_THRESHOLD" : 45.0

        

2. Optionally, you can also activate a web server to show the current temperature on http://ip_address:SERVER_PORT/. Make sure to choose a free port.

        "WEB_SERVER": true,

        "SERVER_PORT": 4949

Another available option is to pass these parameteres through the CLI:

		node index.js -n 18    # 'Choose the GPIO number'

		node index.js -p 4949  # 'Start the server on port 4949'

		node index.js -t 45    # 'Set a temperature threshold of 45 degrees'

		node index.js -r 60    # 'Check the temperature every 60 seconds'

### Run on start up

1. clone the repo on the /home/pi/Desktop:

        git clone https://roccomuso@github.com/roccomuso/rpi-fan.git

        cd rpi-fan && npm install

    

2. add this rule to crontab:

  - Launch from CLI crontab -e and add the following line:

      

          @reboot /usr/local/bin/node /home/pi/Desktop/rpi-fan/index.js >/tmp/fan_output 2>/tmp/fan_error

  

(General console.log and error messages are respectively in /tmp/fan_output and /tmp/fan_error - Update: /tmp/fan_output can now be seen on the web server page.)

  

You can also better use a process manager (like PM2):

    sudo pm2 start index.js --name="rpi-fan"

#### Author @ Rocco Musolino - hackerstribe.com