[initeq] 2-Pack ESP-32 32-Bit Development Board with Built-In Wifi + Bluetooth ESP-WROOM-32 ESP32

They work well as development nodes. The fact that they are sold in pairs is a nice touch, since it provides a way to get a ready-made kit to develop node-to-node solutions at a reasonable price.The board perfectly well with the Arduino dev environment, and that brings in a lot of libraries that generally make prototyping quick and easy. If you search the web for "IOT MADE SIMPLE: PLAYING WITH THE ESP32 ON ARDUINO IDE", you'll find a page on Instructables that tells how to set things up fo ESP32 programming with Arduino.My only mild disappointment was the lack of a pinout diagram. However, the Instructables page happens to have pinout information for a board that is identical to this initeq dev board, so that was helpful. If you google "esp32 devkit v1" you will get a ton of info, because board appears to be a re-badged Zerynth EXP32 DevKit V1My pinout frustrations were because, In my particular case, I wanted access to the built-in LED. A little probing with a multi-meter revealed that it was connected to GPIO 2. A little hunting through the headers for the various ESP32 board types revealed that setting the board as a NODEMCU-32S would pull in a header that had a suitable definition for the LED_BUILTIN. Overall, the pin-map is important for making the best allocation of pins in a given application, so the fact that it isn't on the product page is an annoyance.In any case, once I sorted that out, all was well ... The ESP chips really are remarkable.

These things are so cool. If you like Arduino you're going to love this.

These units worked quite well but they are too wide to use with a single breadboard.

Exactly as described.