Lorawan node can not send packages. US frequency.

  • I tried to set a lorawan nsode US frequencies, but i can not get traffic in my gateway, sometimes only get 1 or 2 packages. I supposed that my transcever was damaged but if i use lora-lora connection it works well.

    I am attaching the code if the community see something wrong that helps me.

    from network import LoRa
    import socket
    import binascii
    import struct
    import time

    Initialize LoRa in LORAWAN mode.

    lora = LoRa(mode=LoRa.LORAWAN, public=True, adr=True)

    create an ABP authentication params

    dev_addr = struct.unpack(">l", binascii.unhexlify('01 0E 1A DD'.replace(' ','')))[0]
    nwk_swkey = binascii.unhexlify('47400CAAE9B7B6E2A3EDD26F45274BBE'.replace(' ',''))
    app_swkey = binascii.unhexlify('D06604A453F36920881C5AD78FE10E4D'.replace(' ',''))

    set the channels

    #lora.add_channel(0, frequency=902300000, dr_min=0, dr_max=4)
    #lora.add_channel(1, frequency=902500000, dr_min=0, dr_max=4)
    #lora.add_channel(2, frequency=902700000, dr_min=0, dr_max=4)
    #lora.add_channel(3, frequency=902900000, dr_min=0, dr_max=4)
    #lora.add_channel(4, frequency=903100000, dr_min=0, dr_max=4)
    #lora.add_channel(5, frequency=903300000, dr_min=0, dr_max=4)
    #lora.add_channel(6, frequency=903500000, dr_min=0, dr_max=4)
    #lora.add_channel(7, frequency=903700000, dr_min=0, dr_max=4)

    lora.add_channel(0, frequency=902300000, dr_min=0, dr_max=3)

    remove all the non-default channels

    for i in range(1, 15):

    join a network using ABP (Activation By Personalization)

    lora.join(activation=LoRa.ABP, auth=(dev_addr, nwk_swkey, app_swkey))

    create a LoRa socket

    s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)

    set the LoRaWAN data rate

    s.setsockopt(socket.SOL_LORA, socket.SO_DR, 3)

    make the socket blocking


    for i in range (200):
    s.send(b'PKT #' + bytes([i]))

    rx = s.recv(256)
    if rx:

  • @jcaron
    The code is using ABP so there is no actual join procedure, it's just assigning keys

  • @blackansible what does lora.has_joined() return? Note that it may take a little while to join.

  • @blackansible said in Lorawan node can not send packages. US frequency.:

    for i in range(1, 15):

    Are you using a single channel gateway (for example another LoPy as as a nano gateway)?

    If so you need to remove_channels up to 72, not just 15.

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