Lopy lora mode no trasmit



  • I bought recently lopy OEM, I'm doing some tests with lora but it does not seem to work.
    I came up with many examples of official documentation.

    I connected vdd33, gnd, rst, P0 (RX), P1 (TX)

    The modules communicate with the serial and i can program them and I also successfully tried wifi and bluetooth.

    "uname" modules updated to the latest version via your software:
    (Sysname = 'Lopy', nodename = 'Lopy', release = '1.7.1.b2', version = 'v1.8.6-642-g84447452 on 3.6.2017', machine = 'Lopy with E
    SP32 ', lorawan =' 1.0.0 ')

    Frequency lora 868, tested in various configurations bandwidth, coding rate and spread factor

    Do you have any idea ???
    Regards
    Giacomo



  • Today,
    With the release of "1.7.3.b1" version lora seems to communicate on OEM L01 modules after much hardware and software testing ......

    regards



  • @james said in Lopy lora mode no trasmit:

    You can send me an example of the minimum and how to link lopy oem to make it work properly
    thank you
    regards

    HARDWARE CONNECTION LOPY L01 OEM
    please

    We did a lot of hardware and software tests, we have not been able to solve the problem again !!!
    thank's
    regards

    Attached diagram with all connected GNDs
    0_1497283607001_LoPy_OEM_2.jpg



  • @jmarcelino
    I have practically tested the various examples on the documentation, lopy to lopy and lora nano gateway with a node.

    Trying the various 868 and I frequencies with various sf / cr / bw parameters configurations ...

    I do some testing with the hw by connecting the various gnds because I tested spi with the oscilloscope and the signal there.

    Let me know how the tests go.

    thank you
    Regards

    Excuse for my easy english



  • @james
    From the photo I think you connected GND next to RESET and not the one next to 1V8 as in your schematic

    Try adding more direct ground connections especially on the LoRa side.

    Also can you explain how you're testing LoRa?



  • @bucknall
    Also below is the link schema
    thank you

    regards

    0_1497026834571_IMG-20170609-WA0013.jpg



  • You can send me an example of the minimum and how to link lopy oem to make it work properly
    thank you
    regards



  • @bucknall
    Attached to the post some of the photos
    thank you

    regards
    1_1496929028296_lopy-OEM02.jpeg 0_1496929028296_lopy-oem01.jpeg
    excuse for my easy english


  • administrators

    If you can, please send me a picture of how you have the module connected. I might be able to assist you with the problem.

    Thanks,

    Alex



  • @bucknall
    A 1/4 wave antenna
    It may cause problems, it requires a specific one.
    thank you

    regards


  • administrators

    Hi @james,

    Do you have an antenna connected to the OEM module?

    Thanks,

    Alex



  • No idea????
    Please

    Regards


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