[OrangePiZero2W] 2.13inch Touch e-Paper

aksyde

Hi!

Has anyone succeed to play with this ePaper screen

https://www.waveshare.com/wiki/2.13inch_Touch_e-Paper_HAT_Manual#python

on the orange pi zero 2W ?

I have download the required files, and install all required pip package.
I have also set the proper permission to gpio/spi/i2c, following this

https://forum.up-community.org/discussion/2141/solved-tutorial-gpio-i2c-spi-access-without-root-permissions

but i still get

1. [Errno22] Invalid argument

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which, as far as I understand, seems to be related to this kind of error

1. orangepi@orangepizero2w ~ echo 3 > /sys/class/gpio/export
   
2. write: Invalid argument</div>

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as a MWE i tried

1. 
   
2. <div>import OPi.GPIO as GPIO
   
3. import time
   
4. #We need this
   
5. from os import geteuid
   
6. 
   
7. # Pin Definitions:
   
8. ledPin = 4
   
9. 
   
10. # Pin Setup:
    
11. GPIO.setmode(GPIO.BCM)
    
12. GPIO.setup(ledPin, GPIO.OUT) # LED pin set as output
    
13. #If we're not root, sleep 100ms in order for udev to set
    
14. #the permissions on the exported GPIO right
    
15. if(geteuid() > 0):
    
16.         time.sleep(0.1)
    
17. 
    
18. print("Here we go! Press CTRL+C to exit")
    
19. try:
    
20.         while 1:
    
21.                 GPIO.output(ledPin, GPIO.HIGH)
    
22.                 time.sleep(0.5)
    
23.                 GPIO.output(ledPin, GPIO.LOW)
    
24.                 time.sleep(0.5)
    
25. except KeyboardInterrupt: # If CTRL+C is pressed, exit cleanly:
    
26.         GPIO.cleanup() # cleanup all GPIO</div>

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but i get

1. OSError: [Errno 22] Invalid argument
   
2. 
   
3. During handling of the above exception, another exception occurred:
   
4. 
   
5. Traceback (most recent call last):
   
6.   File "/tmp/test.py", line 11, in <module>
   
7.     GPIO.setup(ledPin, GPIO.OUT) # LED pin set as output
   
8.     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   
9.   File "/home/orangepi/code/venv/lib/python3.11/site-packages/OPi/GPIO.py", line 480, in setup
   
10.     raise e                           
    
11.   File "/home/orangepi/code/venv/lib/python3.11/site-packages/OPi/GPIO.py", line 472, in setup
    
12.     sysfs.export(pin)
    
13.   File "/home/orangepi/code/venv/lib/python3.11/site-packages/OPi/sysfs.py", line 37, in export
    
14.     with open(path, "w") as fp:
    
15. OSError: [Errno 22] Invalid argument
    

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many thanks!

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