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