ESP32 BLE beacon tracker

Work in progress to implement an BLE sniffer sending packets through MQTT

Installation

Install ESP32 toolchain as described here. I currently use 1.22.0-75
Clone esp-idf and set its IDF_PATH environment variable. I use this specific commit, close to v2.1
Run make menuconfig
- Network configuration to configure WiFi and MQTT
- Component config
  - Bluetooth->Bluedroid Bluetooth stack enabled to activate GATT client module(GATTC)
  - Partition Table -> Select Custom partition CSV file

Configuration

While WiFi and MQTT have been configured in previous step, some configuration remains -for now- in code:

MQTT
Security (TLS): Edit espmqtt library #define CONFIG_MQTT_SECURITY_ON, in file mqtt_config.h
Publication topic, retain & QOS: Edit them in mqtt_publish() here
Scan parameters
- Frequency: #define SCAN_FREQUENCY_MS here in milliseconds
- Duration: #define SCAN_DURATION_S next line