The 1.28-inch watch development board uses RP2040 single-chip microcomputer. RP2040 has a pair of ARMCortex-MO+cores with a clock frequency of 133MHz, providing sufficient integer performance. With 264 KB of large RAM and 4 Mbytes of spi-flash on board, users can develop a large number of applications using c or MicroPython.
Basically, it's a smartwatch kit that you can hack. No documentation so you'll have to do your homework to figure it out.
JTAGulator alternative for RP2040 microcontroller based development boards including RPi Pico.
Connect the RP2040 microcontroller based development board running blueTag to your computer using USB cable. Connect the development board's GPIO pins (GPIO0-GPIO15 so 16 channels in all) to your target's testpoints on the PCB. Connect the development board's "GND" pin to target's "GND". Connect to your RP2040 using a terminal emulator. blueTag supports auto-baudrate detection so you should not have to perform any additional settings. Press any key in the terminal emulator program to start using blueTag. The firmware methodically pokes at all of the connected lines to figure out what kind of interface it is (JTAG, I2C, SPI, etc) and which line is hooked to which pin of that interface for you.
Tiny research project build on top of MicroPython providing DOS/POSIX-like operating system. Designed for ESP8266 and RP2040. Should work on any board with no or little changes.
I always wanted to make my own small operating system. I grew up using MS-DOS and now using Linux exclusively on all my computers. So my system will look very similar to those, just simpler. Another dream was to build as small a computer as possible. Now with 32-bit ESP8266 and MicroPython I could do that! So I did.