UART HCI Bluetooth Module

There is a Bluetooth 4.2 dual-mode controller inside the ESP32 chip, which can use UART(H4) as HCI IO.

Pinmap

HOST	RX	TX	CTS	RTS
ESP32	TX	RX	RTS	CTS
Pin	5	18	19	23

• HCI UART protocol: H4
• HCI UART baudrate: 921600 bps

Preparing

Obtain the source

git clone --recursive https://github.com/redchenjs/uart_hci_bluetooth_module_esp32.git

Update an existing repository

git pull
git submodule update --init --recursive

Setup the tools

./esp-idf/install.sh

Building

Setup the environment variables

export IDF_PATH=$PWD/esp-idf
source ./esp-idf/export.sh

Flash & Monitor

idf.py flash monitor

Attach device to system

btattach -B /dev/ttyX -P h4 -S 921600