DevHeads IoT Integration ServerDIIS
DevHeads IoT Integration Server•16mo ago
Enthernet Code

ESP32 BLE Fails to Advertise or Get Detected by Mobile App in Temperature Monitoring Project

Hello guys ahv gotten to a new stage on my project simple temperature monitoring system using MicroPython on a Zephyr RTOS-supported microcontroller, such as the ESP32, and transmit the data over Bluetooth Low Energy (BLE) to a mobile app. Am currently transmit the temperature and humidity data over Bluetooth Low Energy (BLE) from the ESP32 to a mobile app but BLE fails to advertise or the mobile app does not detect the ESP32.

Here's my code

import bluetooth
from machine import Pin
import dht

sensor = dht.DHT11(Pin(4))
ble = bluetooth.BLE()
ble.active(True)

def advertise():
    adv_data = b'\x02\x01\x06' + b'\x03\x03\xaa\xfe'
    ble.gap_advertise(100, adv_data)

def send_data(temp, hum):
    data = "Temp: {}°C, Hum: {}%".format(temp, hum)
    ble.gatts_notify(0, 0, data.encode('utf-8'))

advertise()

while True:
    sensor.measure()
    temp = sensor.temperature()
    hum = sensor.humidity()
    send_data(temp, hum)
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