In addition to the Espressif meshkit button I have some other cool hardware on the workbench at the moment …
Adafruit Metro M4 Express and Feather nRF52840 Express
The Metro M4 Express is a nice development board with an Arduino-compatible footprint but a lot faster CPU.
Air602 dev board and module
The “dev board” is just the Air602 module plus a USB serial converter, voltage regulator, reset button and PCB antenna. Yes, yet another microcontroller whose interface to the world is a serial port!
The Air602 could be quite handy as a “wifi coprocessor” at the very least … no MicroPython yet but it’s not impossible! With a Cortex M3 at 80MHz and 288kB RAM it’s in the same ballpark as the ‘66.
ESP32 with Lorawan
Quite a few people have put work into MicroPython drivers for SX1276 and I hope to get this into mainstream MicroPython at some point …
An cheap and interesting RISC-V with addition “neural network coprocessor”.
Sipeed MAIX Display
The Sipeed MAIX MicroPython Fork (MaixPy) came preloaded on the device, and you can connect to it with the usual 115200/N/8/1 serial port settings. I got as far as taking a photo with the supplied camera and displaying it on the supplied screen. Pretty cool!
Sonoff S20 schematics are available which makes these a great choice if you’re considering switching mains from a hobbyist project and don’t want to get locked into someone else’s IoT solution.
Suitable for running FuPy, I’ve soldered headers all over this one, and now I need to get back to it and try to actually make some progress on understanding FPGAs!