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

“`python
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)
“`