ninnux commented 6 years ago

My System: (sysname='LoPy', nodename='LoPy', release='1.8.0.b1', version='v1.8.6-760-g90b72952 on 2017-09-01', machine='LoPy with ESP32', lorawan='1.0.0') pytrack fw 0.0.4

My fault main.py:

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

from network import LoRa import socket import binascii import struct import time import config import time import gc from machine import Timer from L76GNSS import L76GNSS from pytrack import Pytrack from network import LoRa import pycom

initialize LoRa in LORAWAN mode.

lora = LoRa(mode=LoRa.LORAWAN)

create an OTA authentication params

dev_eui = binascii.unhexlify('00 00 00 00 00 00 00 05'.replace(' ','')) app_eui = binascii.unhexlify('00 00 00 00 00 00 00 05'.replace(' ','')) app_key = binascii.unhexlify('AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA'.replace(' ',''))

set the 3 default channels to the same frequency (must be before sending the OTAA join request)

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 OTAA

lora.join(activation=LoRa.OTAA, auth=(dev_eui, app_eui, app_key), timeout=0, dr=config.LORA_NODE_DR)

pycom.heartbeat(False)

wait until the module has joined the network

while not lora.has_joined(): time.sleep(2.5) print('Not joined yet...') print('Joined now')

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, config.LORA_NODE_DR)

make the socket blocking

s.setblocking(False)

time.sleep(5.0)

Enable garbage collection

time.sleep(2) gc.enable()

Set up GPS with modest timeout

py = Pytrack() l76 = L76GNSS(py, timeout=30)

chrono = Timer.Chrono() chrono.start()

ledstatus=0x7f7f00 # giallo

while True: coord = l76.coordinates() ## Gets coordinates if not coord == (None, None): lat, lon = coord print(lat, lon) else: print("No coordinates found") lat="None" lon="None" s.send(b''+str(lat)+','+str(lon)) ## Send last known coordinates print("messge sent") time.sleep(4) rx, port = s.recvfrom(256) if rx: print('Received: {}, on port: {}'.format(rx, port)) gc.mem_free() time.sleep(6)

If I comment "coord = l76.coordinates()" line node receive downlink message, otherwise messages remain in server queue and never arrive to node.

danicampora commented 6 years ago

Hello, the call to get the coordinates is blocking everything until the GPS gets a valid fix. You can try using a different thread for the LoRa part while you wait for the GPS.