• UNO R3
• MCU: ATmega328P
• USB-to-serial: CH340
• Pinout
• Schematic
• Datasheet

SDK

• awesome-embedded-rust#arduino
• avr-hal

cargo generate --git https://github.com/Rahix/avr-hal-template.git

AliExpress listing - UNO R3 CH340G+MEGA328P SMD Chip 16Mhz For Arduino UNO R3 Development Board USB CABLE ATEGA328P One Set