Wifi RSSI and mqtt subscribe

[sjp770]

I'm trying to change the RGB led through a simple subscribe and callback but it doesn't seem to be processing the subscribed message.

I also wanted to publish the current signal strength at boot - is there a way to do this, even if its from a scan before wifi connect?

Any ideas? Here is my main.py so far:

from mqtt import MQTTClient
from machine import Pin
import machine
import time
from network import WLAN
import pycom
pycom.heartbeat(False)

def trig_reset(arg):
    machine.reset()

def sub_cb(topic, msg):
   print(msg)

wlan = WLAN(mode=WLAN.STA)
wlan.connect("SSID_Name", auth=(WLAN.WPA2, "wifipass"), timeout=5000)

while not wlan.isconnected():
    machine.idle()
print("Connected to Wifi\n")
wifiaddress = ((str(wlan.ifconfig()[:1]))[2:])[:-3]

client = MQTTClient("LoPy", "192.168.1.15",user="username", password="pass", port=1883)

client.connect()
client.set_callback(sub_cb)
client.subscribe(topic="lopy/rgb")
client.publish(topic="lopy/ip", msg=wifiaddress)

button = Pin('P10', mode=Pin.IN, pull=Pin.PULL_UP)
button.callback(Pin.IRQ_RISING, trig_reset)

[sjp770]

@this.wiederkehr Thanks, I will try that later tonight.

[this.wiederkehr]

You have to call either client.wait_msg() or client.check_msg() in order to receive messages. The former is blocking whereas the latter is non blocking and has therefore to be called in a loop. See the comments on the mentioned methods in the following file:
https://github.com/pycom/pycom-libraries/blob/master/examples/mqtt/mqtt.py