Paho-mqtt script not work

Configuration
1

Hi, I have a simple python script in rpi which reads distance sensor and send True or False over mqtt depending some criteria

import time
import argparse

import board
import busio

import adafruit_vl53l0x
import settings

i2c = busio.I2C(board.SCL, board.SDA)
vl53 = adafruit_vl53l0x.VL53L0X(i2c)

import paho.mqtt.client as mqtt

# Argument parser setup
parser = argparse.ArgumentParser(description="Distance measurement with MQTT")
parser.add_argument('--verbose', action='store_true', help='Enable verbose mode')
args = parser.parse_args()

# MQTT setup
client = mqtt.Client(client_id=settings.MQTT_CLIENT_ID, protocol=mqtt.MQTTv5)
client.username_pw_set(settings.MQTT_USERNAME, settings.MQTT_PASSWORD)
client.connect(settings.MQTT_BROKER, settings.MQTT_PORT, 60)

# Subscribe to the state topic
client.subscribe(settings.MQTT_TOPIC_SUBSCRIBE)

# Variables to track time and state
start_time = time.time()
state = None

while True:
    distance = vl53.range
    current_time = time.time()

    if args.verbose:
        print(f"Measured distance: {distance} mm")

    if distance < settings.DISTANCE_THRESHOLD:
        if state != "True" and current_time - start_time >= settings.TIME_BELOW_THRESHOLD:
            client.publish(settings.MQTT_TOPIC_PUBLISH, "True")
            if args.verbose:
                print("State changed to True and published to MQTT")
            state = "True"
            start_time = current_time  # Reset start_time when state changes to True
    else:
        if state != "False" and current_time - start_time >= settings.TIME_ABOVE_THRESHOLD:
            client.publish(settings.MQTT_TOPIC_PUBLISH, "False")
            if args.verbose:
                print("State changed to False and published to MQTT")
            state = "False"
            start_time = current_time  # Reset start_time when state changes to False

    time.sleep(0.5)

and

MQTT_TOPIC_SUBSCRIBE = 'homeassistant/sensor/VL53L0Xr/state'
MQTT_TOPIC_PUBLISH = 'homeassistant/sensor/VL53L0Xr/status'

I see from my mqtt broker that it connects to EMQX so I think it should work. I have in my ha config these lines:

mqtt:
  - binary_sensor:
      name: "Distance Sensor State"
      state_topic: "homeassistant/sensor/VL53L0Xr/status"
      device_class: "motion"
      qos: 0
      value_template: "{{ value_json.state }}"

It creates the sensor but state is “unknown”
Any help would be nice!
Thx
Mika

2

Hello Mika_Ihatsu,

You can look at my code if you like…