forked from ryanzav/LoRaWAN
/
txrx_ttn.py
100 lines (80 loc) · 2.55 KB
/
txrx_ttn.py
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#!/usr/bin/env python3
# btemperli, 14.2.2021
import sys
from time import sleep
from SX127x.LoRa import *
from SX127x.LoRaArgumentParser import LoRaArgumentParser
from SX127x.board_config_ada import BOARD
import keys
import counter
import LoRaWAN
from LoRaWAN.MHDR import MHDR
import reset_ada
BOARD.setup()
parser = LoRaArgumentParser("LoRaWAN sendReceive")
class LoRaWanSystem(LoRa):
def __init__(self, devaddr = [], nwkey = [], appkey = [], verbose = False):
super(LoRaWanSystem, self).__init__(verbose)
self.devaddr = devaddr
self.nwkey = nwkey
self.appkey = appkey
def on_rx_done(self):
print("RxDone")
self.clear_irq_flags(RxDone=1)
payload = self.read_payload(nocheck=True)
print("".join(format(x, '02x') for x in bytes(payload)))
lorawan = LoRaWAN.new(keys.nwskey, keys.appskey)
lorawan.read(payload)
print(lorawan.get_mhdr().get_mversion())
print(lorawan.get_mhdr().get_mtype())
print(lorawan.get_mic())
print(lorawan.compute_mic())
print(lorawan.valid_mic())
raw_payload = "".join(list(map(chr, lorawan.get_payload())))
print(raw_payload)
print("\n")
self.set_mode(MODE.SLEEP)
self.reset_ptr_rx()
self.set_mode(MODE.RXCONT)
sys.exit(0)
def on_tx_done(self):
self.clear_irq_flags(TxDone=1)
print("TxDone\n")
print("Receiving LoRaWAN message\n")
self.set_mode(MODE.STDBY)
self.set_dio_mapping([0] * 6)
self.set_invert_iq(1)
self.reset_ptr_rx()
self.set_mode(MODE.RXCONT)
def do_send(self):
lorawan = LoRaWAN.new(keys.nwskey, keys.appskey)
lorawan.create(MHDR.UNCONF_DATA_UP, {'devaddr': keys.devaddr, 'fcnt': counter.get_current(), 'data': list(map(ord, 'Python rocks!'))})
self.write_payload(lorawan.to_raw())
self.set_mode(MODE.TX)
while True:
sleep(1)
# First: Send
lora = LoRaWanSystem(False)
# Setup
lora.set_mode(MODE.SLEEP)
lora.set_dio_mapping([1, 0, 0, 0, 0, 0])
lora.set_freq(868.1)
lora.set_pa_config(pa_select=1)
lora.set_spreading_factor(7)
lora.set_pa_config(max_power=0x0F, output_power=0x0E)
lora.set_sync_word(0x34)
lora.set_rx_crc(True)
print(lora)
assert(lora.get_agc_auto_on() == 1)
try:
print("Sending LoRaWAN message\n")
lora.do_send()
sleep(0.1)
lora.set_mode(MODE.SLEEP)
except KeyboardInterrupt:
sys.stdout.flush()
print("\nKeyboardInterrupt")
finally:
sys.stdout.flush()
lora.set_mode(MODE.SLEEP)
BOARD.teardown()