Library: https://github.com/micropython/micropython-lib/blob/master/urequests/urequests.py
# ************************************** # Load necessary libraries import machine import network import wifi_credentials import urequests import dht import time # ************************************** # Create objects: led = machine.Pin(2,machine.Pin.OUT) d = dht.DHT22(machine.Pin(23)) # ************************************** # Configure the ESP32 wifi as STAtion sta = network.WLAN(network.STA_IF) if not sta.isconnected(): print('connecting to network...') sta.active(True) #sta.connect('your wifi ssid', 'your wifi password') sta.connect(wifi_credentials.ssid, wifi_credentials.password) while not sta.isconnected(): pass print('network config:', sta.ifconfig()) # ************************************** # Constants and variables: HTTP_HEADERS = {'Content-Type': 'application/json'} THINGSPEAK_WRITE_API_KEY = 'W6ANWJGN2T7507GW' UPDATE_TIME_INTERVAL = 5000 # in ms last_update = time.ticks_ms() # initially there would be some delays # before submitting the first update # but should be enough to stabilize the # the DHT sensor. # ************************************** # Main loop: while True: if time.ticks_ms() - last_update >= UPDATE_TIME_INTERVAL: d.measure() t = d.temperature() h = d.humidity() dht_readings = {'field1':t, 'field2':h} request = urequests.post( 'http://api.thingspeak.com/update?api_key=' + THINGSPEAK_WRITE_API_KEY, json = dht_readings, headers = HTTP_HEADERS ) request.close() print(dht_readings) led.value(not led.value()) last_update = time.ticks_ms()
