datalogger/uP/main.py

from machine import Pin
from time import sleep
import machine
import dht
from umqtt.robust import MQTTClient
import json
import gc

with open("config.json", 'r') as f:
    config = json.load(f)
    
print(config)

led = Pin(2, Pin.OUT)
d = dht.DHT11(Pin(12))
adc = machine.ADC(0)

c = MQTTClient("umqtt_client", config["mqtt"]["server"],ssl=True, user=config["mqtt"]["user"], password=config["mqtt"]["password"])
gc.enable()

while True:
    led(0)
    d.measure()
    data = {'temp': d.temperature(), 'humid': d.humidity(),'light': adc.read(), 'id': config["id"]}
    print(data)
    led(1)
    try:
        c.connect()
        c.publish(b"sensors", json.dumps(data))
    finally:
        c.disconnect()
    gc.collect()