Chart Android Bluetooth Low Energy app graphs raw numerical string data from an Internet Of Things (IOT) device like the ESP32-S3 using MicroPython optimized for microcontrollers. Fun educational projects are illustrated for your enjoyment below.



Amazon Parts

ESP32-S3 Buy at least 512K RAM version


Setup Instructions

• Install MicroPython on ESP32-S3 device
• Install Thorny IDE
• Download and save library file onto ESP32-S3 device

MicroPython Random Number Code

from BluetoothLE import ESP32_BLE
import random
from time import sleep_ms

# initialize bluetooth with name, "ESP32BLE-Random"
ble = ESP32_BLE("ESP32BLE-Random")

# loop forever
while True:

    # random number between 1-100
    number: int = random.randrange(100) + 1

    # push data to Android app
    ble.send(str(number))

    # sleep half a second
    sleep_ms(500)