IoT boards based on ESP32

ESP32 is a chip that has two network stacks, Wi-Fi and BLE from Espressif, and is available at http://espressif.com/en/products/hardware/esp32/overview. This chip enables you to connect servers through a built-in Wi-Fi module. Based on my experience, there are a lot of IoT boards based on the ESP32 chip. The following is a list of ESP32 development boards:

• SparkFun ESP32 Thing, available at  https://www.sparkfun.com/products/13907
• Espressif ESP32 Development Board, available at https://www.adafruit.com/product/3269

You also find various IoT boards based on the ESP32 chip at Aliexpress or online stores. A form of SparkFun ESP32 Thing is shown in the following image:

We can also use Mongoose OS ESP32-DevKitC from Cesanta to build applications for AWS IoT. To communicate with AWS IoT, they provide the Mongoose OS, which runs on ESP32. Several libraries from the Mongoose OS can be used to communicate with AWS IoT. The Mongoose OS ESP32-DevKitC from Cesanta is shown in the image source https://mongoose-os.com/aws-iot-starter-kit/.