ESP32 OTA Serial

This small project provides simple ready to use mechanism to update your ESP32 and ESP8266 over the air (OTA) and to handle serial communication wirelessly using PlatformIO. It uses ArduinoOTA library as well as forked(slightly changed) version of: https://github.com/janphoffmann/AsyncTelnet.git

Prerequisites

Copy the following files from HelloWorld examples to your project:

• HelloWorld.ino (into src dir)
• secrets.h (into src dir)
• platformio.ini (into project root)

You also need to edit a secrets.h file that contains your WiFi credentials.

IMPORTANT!!!

Remember to add this file to your .gitignore file to avoid sharing your secrets with the world.

How to use

To upload project for the first time you need to use USB, so run in console in project directory: pio run -t upload -e usb

After uploading the project you can run also pio run -t upload -e ota to upload the project wirelessly.

Now you can also get serial output wirelessly using pio device monitor -e ota command.

How it works

The HelloWorld.ino file is a simple example that demonstrates what this library does:

1. Connects to the WiFi network using the credentials from secrets.h.
2. Begins the wireless serial communication.
3. Sets up the OTA updater with a specific hostname.
4. In the main loop, it sends a "Hello, world!" message followed by the current time in milliseconds to the serial port every second. It also handles any incoming OTA updates.

Here's the code:

#include "secrets.h"
#include <OTA.h>

void setup() {
    OTA::setupWiF1(WIFI_SSID, WIFI_PASS);
    OTA::start("ESP32-OTA");
}

void loop() {
    WSerial.println("Hello, world! " + String(millis()));
    OTA::handle();
    delay(1000);
}

Once the code is running on your ESP32, you can connect to the serial port wirelessly using PlatformIO Serial Monitor or any Telnet and see the "Hello, world!" messages. You can also send OTA updates to the ESP32 using the specified hostname.