I have two LoPy4 Dev boards. I am using this tutorial in order to (successfully) communicate with the two boards. After receiving data in LoRa communication I am trying to also publish this data in an MQTT Broker. I have followed the related MQTT tutorial which is provided by Pycom, here (also placed mqqt.py file under lib/ folder) but every time that I am trying to run the code I get OSError: [Errno 104] ECONNRESET.
Has anyone faced any similar issues ?
This is the main file that I am using on the LoPy:
from mqtt import MQTTClient
# from mqtt import MQTTClient_lib as MQTTClient
from network import WLAN
import machine
import time
def sub_cb(topic, msg):
print(msg)
wlan = WLAN(mode=WLAN.STA)
wlan.connect("XXXXX", auth=(WLAN.WPA2, "XXXXXXXXXXXXXX"), timeout=5000)
while not wlan.isconnected():
machine.idle()
print("Connected to WiFi\n")
client_id = "python-mqtt-1"
client = MQTTClient(client_id, '0.0.0.0', user="guest", password="guest", port=1883)
client.set_callback(sub_cb)
client.connect()
client.subscribe(topic="python.mqtt")
while True:
x = 100
while x > 0:
client.publish(topic="python.mqtt", msg=str(x))
client.check_msg()
x -= 1
time.sleep(2)
time.sleep(100)
This is the docker compose for the rabbitmq
services:
rabbitmq:
image: rabbitmq:3.9-management
container_name: rabbitmq
ports:
- 1883:1883
- 5672:5672
- 15672:15672
volumes:
- ./conf/myrabbit.conf:/etc/rabbitmq/myrabbit.conf
command: '/bin/bash -c "rabbitmq-plugins enable rabbitmq_mqtt; rabbitmq-server"'
I also created a python script that publishes MQTT messages to the same broker
import random
import time
from paho.mqtt import client as mqtt_client
broker = '0.0.0.0'
port = 1883
topic = "python.mqtt"
generate client ID with pub prefix randomly
client_id = f'python-mqtt-{random.randint(0, 1000)}'
def connect_mqtt():
def on_connect(client, userdata, flags, rc):
if rc == 0:
print("Connected to MQTT Broker!")
else:
print("Failed to connect, return code %d\n", rc)
client = mqtt_client.Client(client_id)
client.username_pw_set('guest', 'guest')
client.on_connect = on_connect
client.connect(broker, port)
return client
def publish(client):
msg_count = 0
while True:
if msg_count == 50 :
break
time.sleep(0.1)
msg = f"messages: {msg_count}"
result = client.publish(topic, msg)
# result: [0, 1]
status = result[0]
if status == 0:
print(f"Send {msg} to topic {topic}")
else:
print(f"Failed to send message to topic {topic}")
msg_count += 1
def run():
client = connect_mqtt()
client.loop_start()
publish(client)
if name == 'main':
run()
When uploading the code to the LoPy I keep getting ECONNRESET, however the python script publishes successfully on the broker.
