Happy to report the RP2040 Zero as a great little controller, and cheaper than a Pro Micro while being way more capable. : r/MechanicalKeyboards
Amazon.com: Waveshare RP2040-Zero A Low-Cost High-Performance Pico-Like MCU Board Based On Raspberry Pi Microcontroller RP2040 Castellated Module Suitable for SMD Applications : Electronics
Waveshare RP2040-Zero Microcontroller Development Board Dual Core Processor for Raspberry Pi Zero, No Welded: Buy Online at Best Prices in SriLanka | Daraz.lk