That’s great news!
I would go for designs A, C and E, with the following comments.
Design A
- Doesn’t the SAMD21 MCU already include an RTC? So we could get rid of the additional RTC IC.
- Red as colour is fine.
- The two Grove connectors below the screen may hide it.
- The real estate saved by removing the RTC IC and the two Grove connectors below the screen may be used to
- either reduced the size of the board,
- or add climate sensors (e.g. BME280 or BME680) and IMU (e.g. BNO055).
Design C
- I like the balance of number of Grove connectors and constrained size.
- Isn’t there room enough to add an external SPI Flash for Python?
Design E
- I like the compact size.
- What is the orange element below the SWD connector?
Other questions
- The boards show 4 POGO pins: are they compatible with the first release of Xiao boards (left)?
All my 4 Xiao boards are from the first release.
-
If the 4 pads are required (right), how to change the first generation board for the second?
-
Have you considered a Premier Expansion Board with an Adafruit Feather form-factor?
-
Is there an ETA for the board?