Simple ESP32 Demo - Simultaneous BT and WiFi

Overview

This Demo program showcases the following items:

• How to connect to a TCP Server using wifi and receive/send small data.
• How to allow Serial BT Devices to connect to the ESP32 and send commands.
• How both services, WiFi and Bluetooth, can coexist.
• How to implement a Table-Based FSM in a small application.
• How to Dockerize and Build an ESP32 Application,

Descritipon

The Application responds to different external events and changes the Built-In LED behavior in accordance.

TCP Server

From the TCP server the user can request the ESP32 to:

• Know if the LED is blinking and how fast it is doing so.
• Query if it is listening to BT events.
• Enable/Disable capturing BT events.

Classic Serial Bt

From a Bluetooth device connected to the ESP32 the user can:

• Send a 0 to toggle slow blinking.
• Send a 1 to toggle fast blinking. Note that this will not work if the user has disabled capturing BT events from the server.

Program State Diagram

• This chart shows which commands produce a change in the LED Blinking State.
• Note that, as stated in above sections, other commands exist but are not listed here as they don't produce any state update.

How To Build n' Run (Ubuntu)

To build the application and test it, you'll need two separate terminals:

In the first one you'll start a local TCP Server.

Firstly, update ./components/tcp_client and ./server/server to use your IP address and desired port. Then run:

python3 ./server/server.py

In another terminal, build the app and flash it to the ESP32.

./docker/docker.build.sh
./docker/docker.run.sh
idf.py build flash monitor