[balefrost]

The Raspberry Pi foundation recently (about a 18 months ago) released their own dual-core ARM chip - the RP2040 - and a corresponding dev board - the Pi Pico. The Pico dev board runs about $4 plus shipping from authorized resellers.

Within the past few weeks, they introduced a wireless version - the Pi Pico W. It's about $6 from authorized resellers, though stock is hard to find at the moment.

https://www.raspberrypi.com/documentation/microcontrollers/

https://www.raspberrypi.com/news/raspberry-pi-pico-w-your-6-...