3 Pack XIAO nRF52840 Sense Development Board - BLE 5.0 Wireless Microcontroller with IMU & Microphone for TinyML TensorFlow Lite Projects, Support Arduino CircuitPython Embedded Machine Learning

Worked perfectly and nicer than expected packaging

These are simply bad a$$! Working with them is simple as long as you flash the correct .bin file if installing MicroPython. I have small, powerful, and durable.

Love these little things.

these chips are great, and definitely buy them here on Amazon instead of direct from Seeed. They cost $5 more here, but whenever I've bought direct from Seeed, they've taken 3+ weeks to arrive.

I've used these boards to run WLED on some smaller projects and they've been fantastic.

The media could not be loaded. Really easy to integrate into Arduino IDE. Wiki gives step by step instructions. Only issue I ran into was the IDE gave me a "non trusted contribution" error for a post install script. The script is for installation of the DFU-RT port driver. Follow the path the IDE gives you and you'll find the script. It's in plain text (as a BAT file) and is easy to understand. After running the script, driver installed and I was off and running.Board is tiny, low power, and tons of potential. First time turning on seams to have a program loaded that shows off the RGB led built onto the board (see video).Look forward to trying out the integrated 14-bit ADC and 12-bit DAC. Maybe a modular synth.Also interesting, since it is a low power board, is its integrated battery voltage reading ability. Direct connection to monitor battery life is a perfect feature for this board.Only downside is the price. This board is readily available for $5. If your willing to pay the premium for two day shipping, then I'd say go for it. This is a really cool little starter board.

I found this to be a pretty awesome little processor for micro-Python. I saw another review complaining about SPI compatibility… SPI uses IOs which aren’t connected to the header. You have to solder straight to the pad for SPI. I got this running with a small screen for SPI and it works fairly well.

I haven't used the RA4M1, but I'm liking it a lot so far. It's based on UNO R4 Minima if I'm not mistaken? Either way, the specs are more or less identical aside from the obvious, eg pinouts. It's super low power compared to ESP32 but very capable. It's I like to work with audio a lot so the analog capabilities (decent ADC and DAC) are great for me! It was perfectly simple to get it working with Arduino IDE. Not totally sure what I want to do with it yet, but it offers a lot.