What is it?

A super simple example for how to talk to the OpenAI API and the GPT-4o model from an ESP32. (Other models work as well)

Instructions

• Go to https://platform.openai.com/api-keys and create an OpenAI API key (Register an account if you don't have one)
• Add your API key and WiFi details to src/config.example.h and rename it to src/config.h
• Connect an ESP32 microcontroller and configure platformio.ini accordingly (I was using a ttgo-lora32-v1)
• Open src/main.cpp and check out the sample usage at the end of setup():

  // Example usage
  String systemMessage = "You are a helpful assistant.";
  String userMessage = "Tell me a joke about modular synthesizers.";
  sendRequest(systemMessage, userMessage);

• If you want to use a different model than gpt-4o, change this line: jsonRequest["model"] = "gpt-4o";
• Build and run, open the** Serial Monitor** and see the result of your request.

Full Tutorial

Read a full tutorial on my blog here: https://markus.hofer.rocks/gpt4o-microcontroller