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Visitor II
February 17, 2021
Question

Is it possible to hook up sim800l to nucleo and pc at the same time?(schematics included)

  • February 17, 2021
  • 1 reply
  • 1309 views

hi everyone , i want to set up my circuit in such a way that as soon as i turn on my board it starts sending AT commands to sim800l to put it on GSM mode and do some stuff ,is it possible to put my pc in the middle like in the picture?

0693W000008GTMyQAO.jpg

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    1 reply

    Apakp.1Author
    Visitor II
    February 17, 2021

    i'm sorry but i did not have enough space to ask my question completely , so i will have to add a comment to do so :( so what confuses me is that USART2 is connected to the USB which is connected to my PC and i can send and receive messages between sim800l and my pc using virtual com but can i use USART2 to achieve the system that i have so masterfully drawn in paint? :p

    Graduate II
    February 17, 2021

    Ok, you ran out of space because you tried to put the entire question in the title rather than the body of the question.

    But basically yes, you can listen to the output of a serial comm line by connecting it to the receive pin of a USB-to-CMOS Serial type dongle (SiLabs, FTDI, whatever)

    From the modem side, be sure TX is the OUTPUT of the signal

    Apakp.1Author
    Visitor II
    February 17, 2021

    thanks for your quick response it was my first ever question on these forums so i made a mistake, i have edited my topic :D so after searching the internet i came up with something like this:

    https://www.adafruit.com/product/954

    but using this i can only conect sim800l to my laptop , what about the mcu?(i am writing a firmware and i was thinking that being able to see the responses from sim800l to the MCU could help me debug rather than trying to toggle the only user LED available on my board to somehow indicate if everything was successful or not )