├── Dockerfile.template
├── README.md
├── gpio_example.py
└── requirements.txt


/Dockerfile.template:
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 1 | # base-image for python on any machine using a template variable,
 2 | # see more about dockerfile templates here: https://www.balena.io/docs/learn/develop/dockerfile/
 3 | FROM balenalib/%%BALENA_MACHINE_NAME%%-python:3.7-latest-build
 4 | 
 5 | # Set our working directory
 6 | WORKDIR /usr/src/app
 7 | 
 8 | # Copy requirements.txt first for better cache on later pushes
 9 | COPY requirements.txt requirements.txt
10 | 
11 | # pip install python deps from requirements.txt on the resin.io build server
12 | RUN pip install -r requirements.txt
13 | 
14 | # This will copy all files in our root to the working  directory in the container
15 | COPY . ./
16 | 
17 | CMD ["python", "gpio_example.py"]


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/README.md:
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 1 | # Basic GPIO with Python on Balena
 2 | This is a basic example of GPIO control on the Rasperry Pi using Python
 3 | 
 4 | We use the GPIO board pin mapping and we also need few LEDs on two sets of GPIO pin:
 5 | 
 6 | Set A: 3,5,7,8,10,11,12,13,15 (pin number)
 7 | Set B: 16.18,19,21,22,23,24,26 (pin number)
 8 | 
 9 | In this example, the LEDs on two sets will be switched between on and off after one sec. If set A is on then set B is off and vice versa.
10 | 
11 | All you need to do is :
12 | 
13 | * clone this repo locally and cd into the folder.
14 | * connect some LEDs to two pin sets
15 | * add the resin remote repo with `git remote add balena git@git.balena-cloud.com:myGithubName/myResinAppName.git` , with the correct github and app name, or just copy if from the top right hand corner of your device dashboard on resin.io.
16 | * now just `git push balena master` wait a minute or so for the code to upload and start.
17 | * enjoy the all the LED goodness...


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/gpio_example.py:
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 1 | #!/usr/bin/python
 2 | import RPi.GPIO as GPIO
 3 | from time import sleep
 4 | 
 5 | # Set GPIO mode: GPIO.BCM or GPIO.BOARD
 6 | GPIO.setmode(GPIO.BOARD)
 7 | 
 8 | # GPIO pins list based on GPIO.BOARD
 9 | gpioList1 = [3,5,7,8,10,11,12,13,15]
10 | gpioList2 = [16,18,19,21,22,23,24,26]
11 | 
12 | # Set mode for each gpio pin
13 | GPIO.setup(gpioList1, GPIO.OUT)
14 | GPIO.setup(gpioList2, GPIO.OUT)
15 | 
16 | while True:
17 | 	# Change gpio pins in list 1 from low to high and list 2 from high to low
18 | 	GPIO.output(gpioList1, 1)
19 | 	GPIO.output(gpioList2, 0)
20 | 	sleep(1)
21 | 
22 | 	# Change gpio pin in list 1 from high to low and list 2 from low to high
23 | 	GPIO.output(gpioList1, 0)
24 | 	GPIO.output(gpioList2, 1)
25 | 	sleep(1)
26 | 
27 | # Reset all gpio pin
28 | GPIO.cleanup()


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/requirements.txt:
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1 | RPi.Gpio==0.7.1
2 | 
3 | 


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