Reviewing development boards-based ESP32

Since ESP32 has two forms, in chip and module, there are some development boards with an ESP32 chip or ESP32 module. In this book, we will not learn how to make a board-based ESP32. Instead, we will use pre-existing, ready development boards available on the market.

We can categorize boards-based ESP32 into two models. The first board models are the development boards officially manufactured by Espressif.  The second models are from their partners or personal makers.

Let's review some available ESP32 development boards on the market.