WiFi ePaper display module
The 2.9″ ESPaper module displays data retrieved over WiFi on an ePaper display. The integrated ESP8266 Wroom-02 module updates the 296×128 black & which ePaper display over the SPI bus. The module also features a charging circuit for LiPo batteries and a JST connector. The passive nature of ePaper allows the module to run for weeks or even months from a battery on a single charge. Update frequency is almost exactly (inversely) proportional to total uptime. Tests showed a total uptime of several weeks for an update interval of 20 minutes.
ThingPulse also provides a WeatherStation sample application to be loaded onto this WiFi ePaper display kit. The application only requires a handful of parameters and is ready to go.
The open-source Minigrafx display driver library is also developed and maintained by ThingPulse. It offers examples for programming custom applications quickly.
Setup guide & support
- 2.9″ ePaper display 296*128 pixels, black & white
- Espressif ESP8266 Wroom-02 WiFi MCU
- JST LiPo battery connector and charging circuit
- 3 buttons for user interaction:
- RST: wakeup the module from deep sleep, e.g. to refresh data
- S0 FLASH/GPIO0: used to put ESP8266 in programming mode or for user menu
- S1 GPIO 12: User interaction
Please note: for programming the module you need a separate USB-to-Serial converter which supports 3.3V. This module is compatible with the kit: Serial-To-USB-Converter on Banggood
3D Printed Enclosure for ePaper module
The ThingPulse Lite Kit comes without enclosure. If you have access to a 3D printer you can download and use @MCUEclipse’s design from Thingiverse:
@McuOnEclipse also reviewed our WiFi ePaper display kit on his own site at https://mcuoneclipse.com/2017/10/22/squix-esp8266-based-e-paper-weather-station/