Table of Contents
WIO - SPI Clock (GC9A01)
Description
The WIOpico supports as from version 1027 the Adafruit GC9A01 display.
The option WIODialog → Setup → Extra → SPI Clock must be set.
The clock depends on the Rocrail clock events and will first start after the one came in. The clock will not run stand alone.
If the weather is active in Rocrail the brightness will be used for dimming the display.
The second hand will tick slightly faster and wait at 12 until the new clock event did arrive.
Credits
Thanks to HolgerW for providing the graphical implementation. 👍
See for more information the Forum thread (DE)
Wiring
| GC9A01 | Pico | WIOpicoW-01 | Remark | Pull-up on WIOpicoW-01 |
|---|---|---|---|---|
| CS | GP14 | I/O1-7 | SPI Chip select | Remove |
| DC | GP15 | I/O1-8 | Data/Command selector | Remove |
| SDA | GP19 | I/O2-4 | SPI MOSI(TX) | Remove |
| SCL | GP18 | I/O2-3 | SPI SCK(Clock) | Remove |
| VCC | 3V3(OUT) | I/Ox-1 | ||
| GND | GND | I/Ox-2 |
See WIOpicoW-01 I/O for connector pin mapping.
Note: Do not mount RN1 and RN2 on the WIOpicoW-01.
Video
This video does not show the final version but gives a good impression.
Two displays
To make clock with two faces, two displays can be connected parallel to one PicoW:
 |  |
| Front | Back |
Stand alone sketch
Sketch by HolgerW: