开云体育

I stumbled across the Protoneer last week when searching for a controller upgrade.
I was unable to find a Blue Pill or ST board variation that was _pin_ compatible with the Nano.
Maybe I didn't look hard enough.? I know the Blue Pill seems to be a favorite one to throw in the mix.

It certainly seems that it is leading the performance per $ in this market space.

My selection criteria was:

1. More Flash, so people don't have to choose which options from the already developed software they could load, and more headroom for further development.
2. More SRAM.
3. Supported by the familiar Arduino IDE, where the software work is being done.

4. Pin compatible with the Nano for direct replacement on the Radunio board without the need to spin an adapter board (cost with shipping adder)

5. Reasonable total cost of the complete upgrade, so it is an option more aligned to Farhan’s goal of a $100 radio. ?

6. Can be done in a timely manner.

Now, I have not yet received the board or even begun to look at the software changes required.

I do know that there will be small changes needed on which serial object is called.? There may be other quirks.

The board is 3.3V so the impact of that will need to be vetted. (I see 3.3V as being beneficial)
There's a RTC, but I didn't see a familiar Vbat for a coin cell.

?

Adafruit seems to be doing a lot of development with the SAMD21, there could be trickle down from that, or at least re-assuring of the SAMD21 core.