Fire - Core2 and module Lora



  • I have an M5Stack Fire and a Core2 and two Lora modules. The idea is to use one to send and the other to receive. The examples LoraSender and LoraReciber are only for M5Stack,
    is it possible to use the Lora module between a Fire and a Core2, or can they only be used with the M5Stack?

    Thanks in advance
    Carles



  • Hello @Carles-B

    a lot of module have been designed for M5Stack and before M5Core2 came out.

    That said most of them can be used with M5Core2, but unfortunately there is no general rule if a given module will work with M5Core2 or not.

    Often you'll need to adapt the pin assignment and modify the source code accordingly. Sometimes you'll need to cut a trace on the module board to get around an incompatibility with M5Core2.

    What should help you is looking at the schematics of M5Core2 and the desired module to figure out which connections use which GPIO.

    A while ago I made a comparison sheet regarding the GPIOs on the M5Stack Bus and M5Core2 Bus - some GPIOs are the same, some have changed position, some are only available on either core.

    And lastly there are reports that some modules have mechanical issues (pins too short) to properly fit and make contact with the M5Core2.

    So all in all, if a module isn't marked to be compatible with M5Core2 it's probably safe to say that it won't just work out of the box, unfortunately.

    Thanks
    Felix



  • Hello again

    I just noticed that the source code for a couple of Modules and Units have been adapted to M5Core2.

    Cheers
    Felix



  • Thanks for your information and link @felmue

    My initial idea was to buy two TTGO LoRa32 but I preferred these two cores because I saw that they had Lora modules. For the moment I'm going back to the NodeMCU that I find much more comfortable and in a few months I will look at the M5Stack again.

    Thank you for your time
    Carles



  • Hello @felmue

    If you remove the white board from the Core2 and want to insert the Lora module, the slot is too small and does not fit. You will have to have some modules for the M5Stack, I hope all models are compatible, and other modules for the Core2.

    In short if I want to use Lora I have to buy another Fire or similar.

    Regards,
    Carles



  • Hello @Carles-B

    I understand you not only have to remove the small white board, but also unscrew and remove the gray bottom plate from M5Core2 in order to attach the module.

    Note: Be careful when removing the gray bottom plate as it holds the battery which is connected to the M5Core2 main board.

    Thanks
    Felix



  • Hola @felmue

    I just saw your photos on the Core2, but I don't think it all fits together. For the moment I leave it on hold, I just installed IUFlow on the Fire and I'm going to practice a bit with it.

    Regards,
    Carles



  • Hello @Carles-B

    yeah, I cannot say for sure if the LoRa module would actually fit as I don't have one to try.

    Good luck with your experiments and thank you very much for your donation. I appreciate it.

    Thanks
    Felix