Can someone pls. confirm, that MQTT is running w\ latest FW

[Thosch42]

Hi all!
I'm testing some sensors, and just wanted to push the measurements to my local MQTT Broker. But I get allways an error in the MQTT lib.

 File "main.py", line 51, in <module>
  File "/flash/lib/mqtt.py", line 84, in connect
IndexError: bytes index out of range

I did it a thousand times with WiPys 2.0 and LoPys, and it worked allway seemlessly.

Cheers,
Thomas

[ledbelly2142]

The MQTT lib from Pycom (on github) is working for me. I did not get an index error.

[BetterAuto]

@ledbelly2142 said in Can someone pls. confirm, that MQTT is running w\ latest FW:

The MQTT lib from Pycom (on github) is working for me.

This one?
https://github.com/pycom/pycom-libraries/blob/master/examples/mqtt/mqtt.py

[ledbelly2142]

Yes from this example
https://github.com/pycom/pycom-libraries/tree/master/examples/mqtt

Your main.py should have something like:

import socket
import struct
import machine
import time
import ubinascii
import network
from network import WLAN
from network import LoRa
from mqtt import MQTTClient

wlan = network.WLAN(mode=network.WLAN.STA, antenna=WLAN.EXT_ANT)
#wlan.antenna(WLAN.EXT_ANT) You may be using internal antenna
wlan.connect('WiFiSSID', auth=(WLAN.WPA2, 'WiFiPassword'), timeout=5000)

while not wlan.isconnected():
        machine.idle()

print(wlan.ifconfig())
print("Connected to Wifi\n")

client = MQTTClient("nameofMQTTserver", "IPaddressOrURLforMQTTserver", port=1883, user="EnterUserNameForMQTTserver", password="EnterPasswordForMQTTserver")
client.settimeout = settimeout
# You may not be using port 1883, use 8883 if using SSL

#then test with something like:
client.publish("house001/sensor/sensorId_001/temp/c", "23.48")

#the way this library is set up, it needs the topic, then the topic value to be written

If you are not using MQTTlense, I highly recommend it for Chrome. Simple and easy to use for testing. More on MQTTlense HERE

The QOS for this Library is set to 0 (best effort similar to TCP/IP), to avoid ping pong MQTT messaging, use QOS 2 (once and only once) on the subscriber for testing.

[Thosch42]

@ledbelly2142
You don't use client.connect(). Is this right? The connect() method is the one, that gives me the error.

[Thosch42]

Arghh. Got it. It was a typo in the config file of my broker. The broker was running on the wrong port.

Thanks.

Thomas