Prototipo per connettere la schedina ESP32 a internet attraverso un modulo SIM800L https://nettigo.eu/system/images/1935/original.jpg?1479816092
- Connetto il modulo SIM800L alla seriale UART2 dell'ESP32 e inseriscoo una SIM dati vodafone nello slot della SIM800L.
- Flasho sulla schedina ESP32 la versione di Micropython https://github.com/loboris/MicroPython_ESP32_psRAM_LoBo che include il modulo gsm.
Utilizzo il seguente codice per testare:
import gsm
gsm.start(tx=17,rx=16,apn="mobile.vodafone.it") #sostituire eventualmente con i numeri di pin corretti
gsm.ifconfig()
gsm.status()
gsm.connect()
gsm.status()
gsm.ifconfig()Se invece voglio solo mandare sms lo posso fare anche utilizzando la versione ufficiale di micropython:
from machine import UART
import time
ser = UART(2, tx=17, rx=16)
ser.init(9600, bits=8, parity=None, stop=1)
def sendsms(to, message):
ser.write('ATZ\r')
time.sleep(1)
ser.write('AT+CMGF=1\r')
time.sleep(1)
ser.write('''AT+CMGS="''' + to + '''"\r''')
time.sleep(1)
ser.write(message + "\r")
time.sleep(1)
ser.write(chr(26))
time.sleep(1)https://www.treccarichi.net/2016/06/sim800l/
https://www.instructables.com/id/ESP32-SIM800L-and-Barrier-Sensor/
https://articulo.mercadolibre.com.co/MCO-487675426-modulo-celular-gsm-gprs-esp800l-sim800l-sim800-arduino-5v-_JM
https://lastminuteengineers.com/sim800l-gsm-module-arduino-tutorial/
https://randomnerdtutorials.com/power-esp32-esp8266-solar-panels-battery-level-monitoring/
https://randomnerdtutorials.com/esp8266-voltage-regulator-lipo-and-li-ion-batteries/
https://community.hiveeyes.org/t/micropython-libraries-for-the-sim800-module/1492