The ESP8266 from Espressif has made waves in the maker community with its low price: you can get one from AliExpress for just two or three euros/ dollars/pounds. Its big brother, the ESP32, is the result of Espressif’s efforts to make their WLAN SoCs fit for the future. Along with a dual-core processor, it has onboard Bluetooth, more RAM, and IO extensions. In this article we talk about programming the ESP32 with the Arduino IDE. In the next issue of Elektor we will turn our attention to the native development tool IDF.