ESP32 Boards With Displays: An Overview

The ESP8266 has become practically the 555 chip of WiFi connected microcontrollers. Traditionally, you’d buy one on a little breakout board with some pins and a few connectors, and then wire up anything else you need. The ESP8266’s big brother, the ESP32, hasn’t quite taken over from the ESP8266, but it has a lot more power and many more options. [Andreas] has a new video that shows seven new ESP32 boards that have integral displays. These boards can simplify a lot of applications where you need both WiFi and a user interface.

Of the boards examined, six of them have OLED displays, but one has an E-paper display. To summarize results, [Andreas] summarized his findings on these seven along with others in an online spreadsheet.

The boards include:

  • TTGO with 2.9 E-paper display
  • TTGO TS V1.2
  • TTGO T4
  • TTGO Pro V2
  • TTGO LoRa V2
  • Wemos
  • Wifi Kit32

There are two pieces of software to do testing and those are available on GitHub if you want to test new boards or do your own testing.

The review is very practical, examining power consumption, available pins, and how easy it is to use on a breadboard. Since [Andreas] comes tot his with a voice of experience he also looks at things like battery switches, and whether the device crashes if you disconnect the USB power. Spoiler alert: He was not happy with the E-paper display board.

These display-bearing devices are much easier than using a separate ESP32 for each pair of digits. If you need a much bigger display, there’s always this.

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Thoughts or comments?