ESP32_LYWSD03MMC

Edi Supriyadi

This project is for ESP32 and Thermometer LYWSD03MMC
on custom firmware by Aaron Christopel

Features:

Setting via bluetooth LE:

MENU:

1. WiFi credential (saved in EEPROM)
2. Change scan interval (default 10 s, >=10 s)
3. Change server name (saved in EEPROM)
4. Report scanned devices to server
5. Report heap size as BLE notification
6. Change PIN

Multithreading:

• Core 0 running for:
  • WiFi -> sending data to server
• Core 1 running for:
  • BLE -> capturing service data from target devices and setting parameters

Core Process Flow:

SETUP

• Connecting to network (reading EEPROM first for WiFi credential, if available, then using hardcoded one)
• Asking server for mac adresses of BLE devices to capture (TARGET DEVICE)

LOOP

• Scanning BLE devices for service data. First priority: TARGET DEVICE, otherwise just capturing devices with service data in advertising packet.
• Send service data to server

Parameters:

• Wifi credential (SSID and password, max 20 characters): changed via SETTING
• Server address (max 50 characters): changed via SETTING
• BLE scan failure limit : default to 3 times (hardcoded) -> restarting after the limit exceeded
• BLE scan interval: default to 60 s, changed via SETTING
• Target mac adresses (max 10 devices): supplied via server
• PIN to enter SETTING

Development Environment

This project is written in VS Code with platformIO.

Arduino IDE

• Delete line #include <Arduino.h>
• Don't forget to setup partition. Otherwise you'll get oversize warning
• Depending the ESP32 BLE library you are using, if you get warning about advertisedDevice.getServiceData(), just change to advertisedDevice.getServiceData(0)