La bibliothèque SSD1306.py doit être chargée dans la mémoire de l'ESP32.

On la trouve sur Github.

 
#
# Digital thermometer
# Jmd 27/08/2026

from machine import Pin, I2C
import ssd1306
import machine
import utime
import onewire, ds18x20
import network
import socket

APIKEY ="MyKEY" # Write your API Write Key

#function to connect WIFI
def Connect_Wifi():
    import network
    net = network.WLAN(network.STA_IF)
    if not net.isconnected():
        net.active(True)
        net.connect("My SSID", "My Password")   # Write your BOX SSID and Password
        utime.sleep(5)
        print (net.ifconfig())
        


def display_text(text, line, column):
    oled.text(text, 8*column, 9*line)

i2c = machine.SoftI2C(scl=Pin(5),sda=Pin(4),freq =100000)
oled=ssd1306.SSD1306_I2C(128,64,i2c)

Temp = machine.Pin(2)
ds = ds18x20.DS18X20(onewire.OneWire(Temp))

while True:
    #
    # Display the temperature on the screen
    #
    roms=ds.scan()            # Scan DS18B20
    ds.convert_temp()         # Convert temperature
    utime.sleep_ms(750)       # Delay to convert
    
    for rom in roms:
        temperature = ds.read_temp(rom)    # Read temperature
        oled.fill(0)
        display_text("Temp(C)= ", 3, 1)
        display_text(str(temperature)[:4], 3, 9) # Display on the screen
        oled.show()
    #
    # Send temperature on the Thingspeak server every 30 s
    #
    
    Connect_Wifi()
    sock = socket.socket()
    addr = socket.getaddrinfo("api.thingspeak.com",80)[0][-1]
    sock.connect(addr)
    host = "api.thingspeak.com"
    path = "api_key="+APIKEY+"&field1="+ str(temperature)
    sock.send(bytes("GET /update?%s HTTP/1.0\r\nHost: %s\r\n\r\n" %(path,host), "utf8"))
    sock.close()
    utime.sleep(30)