Maker Bounty: Pycom LoPy4 + OTAA on The Things Network (AU915 settings)

Support
1

I’m all ears if someone has setup Pycom LoPy4 on The Things Network with OTAA activation (using AU915 settings). Please share your method here with a demonstration of both the LoPy4 Nano-Gateway, and a LoPy4 Node.

Fyi there is a support topic with Pycom, although given it seems to be localised around AU915, we’re not getting a lot of traction there.

The first solution we can replicate for both the Nano-Gateway and Node (both using Pycom LoPy4, on The Things Network with AU915 settings on Sub Band 2) will get a $300 store credit!

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Hey, sorry for the delay. All code files as per Pycom Libraries on Github

Nano Gateway

config.py

import machine
import ubinascii

WIFI_MAC = ubinascii.hexlify(machine.unique_id()).upper()
# Set  the Gateway ID to be the first 3 bytes of MAC address + 'FFFE' + last 3 bytes of MAC address
GATEWAY_ID = WIFI_MAC[:6] + "FFFE" + WIFI_MAC[6:12]

SERVER = 'router.au.thethings.network'
PORT = 1700

NTP = "au.pool.ntp.org"
NTP_PERIOD_S = 3600

WIFI_SSID = 'XXX'
WIFI_PASS = 'YYY'

# for AU915
LORA_FREQUENCY = 916800000
LORA_GW_DR = "SF7BW125" # DR_5
LORA_NODE_DR = 5

ABP Node

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

# initialize LoRa in LORAWAN mode.
# Please pick the region that matches where you are using the device:
# Asia = LoRa.AS923
# Australia = LoRa.AU915
# Europe = LoRa.EU868
# United States = LoRa.US915
lora = LoRa(mode=LoRa.LORAWAN, region=LoRa.AU915)

# create an ABP authentication params
dev_addr = struct.unpack(">l", binascii.unhexlify('2604126C'))[0]
nwk_swkey = binascii.unhexlify('ADFAAE719468D488F6125362B4197282')
app_swkey = binascii.unhexlify('23AA3ED54B9F8451A7CFCF416140775A')

# remove all the non-default channels
for i in range(0, 72):
    lora.remove_channel(i)

# set the 3 default channels to the same frequency
lora.add_channel(0, frequency=config.LORA_FREQUENCY, dr_min=0, dr_max=5)
lora.add_channel(1, frequency=config.LORA_FREQUENCY, dr_min=0, dr_max=5)
lora.add_channel(2, frequency=config.LORA_FREQUENCY, dr_min=0, dr_max=5)

# 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, config.LORA_NODE_DR)

# make the socket blocking
s.setblocking(False)

for i in range (200):
    pkt = b'PKT #' + bytes([i])
    print('Sending:', pkt)
    s.send(pkt)
    time.sleep(4)
    rx, port = s.recvfrom(256)
    if rx:
        print('Received: {}, on port: {}'.format(rx, port))
    time.sleep(6)

OTAA Node

""" OTAA Node example compatible with the LoPy Nano Gateway """

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

# Initialize LoRa in LORAWAN mode.
lora = LoRa(mode=LoRa.LORAWAN)

# create an OTA authentication params
dev_eui = binascii.unhexlify('70B3D5499B5361C5') # these settings can be found from TTN
app_eui = binascii.unhexlify('70B3D57ED000FF1C') # these settings can be found from TTN
app_key = binascii.unhexlify('A72D4289A54613C3EB4738CB25B6BF5C') # these settings can be found from TTN

# set the 3 default channels to the same frequency (must be before sending the OTAA join request)
lora.add_channel(0, frequency=916800000, dr_min=0, dr_max=5)
lora.add_channel(1, frequency=916800000, dr_min=0, dr_max=5)
lora.add_channel(2, frequency=916800000, dr_min=0, dr_max=5)

# join a network using OTAA
lora.join(activation=LoRa.OTAA, auth=(dev_eui, app_eui, app_key), timeout=0)

# wait until the module has joined the network
while not lora.has_joined():
    time.sleep(2.5)
    print('Not joined yet...')

# remove all the non-default channels
# for i in range(3, 16):
#     lora.remove_channel(i)

# 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, 5)

# make the socket non-blocking
s.setblocking(False)

time.sleep(5.0)

""" Your own code can be written below! """

for i in range (200):
    s.send(b'PKT #' + bytes([i]))
    time.sleep(4)
    rx = s.recv(256)
    if rx:
        print(rx)
    time.sleep(6)

EDIT: OTAA code replaced with runnable code that fails to authenticate.

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