Callback never getting called using pymata-core

[Petapton]

Hello, I can't manage to get a program to work, since when I set a callback it is never called. Although I can clearly see the Tx pin blinking and the callback is properly set, my PymataCore object doesn't seem to react. What's going up? What am I doing wrong? Thank you.

[MrYsLab]

Without seeing your code, it is very difficult to diagnose your issue.

Here is a working example for a digital input with callback:

import asyncio

from pymata_aio.pymata_core import PymataCore
from pymata_aio.constants import Constants

async def the_callback(data):
    print(data)

async def pin_12_digital_input(my_board):

    # set the pin mode
    await board.set_pin_mode(12, Constants.INPUT, the_callback, Constants.CB_TYPE_ASYNCIO)

    # keep the program alive for 20 seconds
    await asyncio.sleep(20)

    # shutdown
    await my_board.shutdown()

# create a PyMataCore instance and complete the initialization with a call to start()
board = PymataCore()
board.start()

loop = asyncio.get_event_loop()
loop.run_until_complete(pin_12_digital_input(board))

Please be aware that in the next few weeks, I will be archiving this repository. Since you are using pymata-core, I suggest you use pymata-express. It provides a pure asyncio API that is simpler to use than pymata-aio, and that has many working examples. You can view an example for digital input with callback here, or analog input with callback here. The PyMata repository is also going to be archived and replaced with pymata4. Pymata4 uses threading as its concurrency model. I am finishing up on the documentation for pymata4, and as soon as it is ready, I will be moving things over to archive.

[Petapton]

Yes, thank you. I just discovered pymata express, but I'm having issues with it also. I'll try to solve them tomorrow(as long as trying your snippet), otherwise I will open an issue for pymata express. Thank you again.

[MrYsLab]

I am going to close this issue. If necessary, I can reopen it. If you have any questions or comments you may enter them here and I will see them even though the issue is closed.