Waveshare RP2040
The Waveshare RP2040 1.28" IPS LCD Board is a wonderful developent board with a build in RP2040 processor that currently sells for about $18. The board has a USB-C connector, a place for a LiPo battery connection and built in Accelerometer & Gyroscope. It is a great value and a wonderful way to start to learn Python for smart watches!
- Waveshare SKU: 22668
- Waveshare Part Number: RP2040-LCD-1.28
- Link to Waveshare site
Note that this watch does not have a real-time clock and has no ability to connect to time syhronization using WiFi. However, it is an ideal development tool for learning to program watch displays and integrate sensors.
MicroPython Version
To use these lessions you much use MicroPython runtime v1.19.1-854-g35524a6fd released on 2023-02-07 or later. This version supports all the native framebuf drawing libraries (ellipse and polygon)
See the documentation here: MicroPython Framebuffer Functions
Lessons
Detailed Components
| Component | Description |
|---|---|
| USB Type-C connector | USB 1.1 with device and host support |
| ETA6096 | high efficiency Lithium battery recharge manager |
| Battery Header | MX1.25 header, for 3.7V Lithium battery, allows recharging the battery and powering the board at the same time |
| QMI8658C | IMU, includes a 3-axis gyroscope and a 3-axis accelerometer |
| 1.27mm pitch headers | Adapting all GPIO and Debug pins |
| W25Q16JVUXIQ | 2MB NOR-Flash |
| RP2040 | Dual-core processor, up to 133MHz operating frequency |
| RESET Button | Reset the processor |
| BOOT Button | press it when resetting to enter download mode |
References
Instructable by Tony Goodhew - note that this version does not leverage the built-in drawing libraries that were made available in version 19 of the MicroPython release. See The MicroPython FrameBuf Library