TTGO T-Watch is watch shape ESP32 based development kit. 16 MB flash and 8 MB PSRAM both are top specification. It also built-in a 240x240 IPS LCD, touch screen, micro-SD card port, I2C port, RTC, 3-axis accelerometer and a custom button. The backplane also can be switched to other modules such as LORA, GPS and SIM.

But the most important thing it can become a usable watch is the power system. It integrated AXP202 multi-channel programmable power management chip. This is the first time I see a development kit that have a I2C controllable power chip!

According to AXP202X_Library interface, you can control each power channel on and off, read the battery level, charging status and even direct shutdown the power, just like pushed the power button.

Ref.:

https://github.com/Xinyuan-LilyGO/TTGO-T-Watch