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LoRaWAN implementation in MicroPython
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This is a LoRaWAN v1.0 re-implementation in MicroPython.

Replaces original use of library Crypto on Raspberry PI by ucryptolib available in MicroPython.

Currently tested on ESP32 and ESP8266 will follow.


TODO test also LoRa library... or add MicroPython code for sx127x


import uLoRaWAN
from uLoRaWAN.MHDR import MHDR

# Init
devaddr = [0x26, 0x01, 0x11, 0x5F]
nwskey = [0xC3, 0x24, 0x64, 0x98, 0xDE, 0x56, 0x5D, 0x8C, 0x55, 0x88, 0x7C, 0x05, 0x86, 0xF9, 0x82, 0x26]
appskey = [0x15, 0xF6, 0xF4, 0xD4, 0x2A, 0x95, 0xB0, 0x97, 0x53, 0x27, 0xB7, 0xC1, 0x45, 0x6E, 0xC5, 0x45]

lorawan =, appskey)

# Create LoRaWAN packet
lorawan.create(MHDR.UNCONF_DATA_UP, {'devaddr': devaddr, 'fcnt': 1, 'data': list(map(ord, 'Python rules!')) })

payload = lorawan.to_raw()

# Read LoRaWAN packet
print("".join(list(map(chr, lorawan.get_payload()))))


This is a LoRaWAN v1.0 modification of original LoRaWAN library from jeroennijhof to use python library pycryptodome, instead of Crypto(pycrypto) which I had problem to install under Python 3.6. I hope it can be useful for someone as I have used it for validation of MicroPython code.

All changes are basically added encryption type AES.MODE_ECB. No more changes on LoRaWAN for Python are not planned since this repo is mainly for MicroPython.

It uses and it's currently being tested with a RFM95 attached to a Raspberry PI. See:

Special thanks

Thanks for nice implementation of LoRaWAN stack by jeroennijhof, which was more or less straightforward to reimplement to pure MicroPython.

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