![Amazon.com: KOOKYE 3PCS Pro Micro ATmega32U4 5V/16MHz Module Board 2 Row Pin Header for Arduino Mini Leonardo : Electronics Amazon.com: KOOKYE 3PCS Pro Micro ATmega32U4 5V/16MHz Module Board 2 Row Pin Header for Arduino Mini Leonardo : Electronics](https://m.media-amazon.com/images/I/61abc33I7dL._AC_UF894,1000_QL80_.jpg)
Amazon.com: KOOKYE 3PCS Pro Micro ATmega32U4 5V/16MHz Module Board 2 Row Pin Header for Arduino Mini Leonardo : Electronics
![Amazon.com: OSOYOO Pro Micro 5V/16MHz Module Board with 2 Row pin Header Replace wit Pro Mini for Arduino : Electronics Amazon.com: OSOYOO Pro Micro 5V/16MHz Module Board with 2 Row pin Header Replace wit Pro Mini for Arduino : Electronics](https://m.media-amazon.com/images/I/71VWjSXd6YL.jpg)
Amazon.com: OSOYOO Pro Micro 5V/16MHz Module Board with 2 Row pin Header Replace wit Pro Mini for Arduino : Electronics
![Amazon.com: AITRIP 5 PCS Pro Micro ATmega32U4 5V/16MHz Module Board with 2 Row pin Header Compatible with arduino Leonardo Replace ATmega328 Pro Mini (5PCS) : Electronics Amazon.com: AITRIP 5 PCS Pro Micro ATmega32U4 5V/16MHz Module Board with 2 Row pin Header Compatible with arduino Leonardo Replace ATmega328 Pro Mini (5PCS) : Electronics](https://m.media-amazon.com/images/I/715Iaywk2ML._AC_UF894,1000_QL80_.jpg)
Amazon.com: AITRIP 5 PCS Pro Micro ATmega32U4 5V/16MHz Module Board with 2 Row pin Header Compatible with arduino Leonardo Replace ATmega328 Pro Mini (5PCS) : Electronics
![Amazon.com: diymore microcontroller Pro Micro 16MHz 5V with 2-Row Pins Header Module Board with ATmega32U4 : Electronics Amazon.com: diymore microcontroller Pro Micro 16MHz 5V with 2-Row Pins Header Module Board with ATmega32U4 : Electronics](https://m.media-amazon.com/images/I/61nYevMgQxL._AC_UF894,1000_QL80_.jpg)
Amazon.com: diymore microcontroller Pro Micro 16MHz 5V with 2-Row Pins Header Module Board with ATmega32U4 : Electronics
![Amazon.com: SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) - Compatible with Arduino development board 5V/16MHz microcontroller AP2112 3.3V Voltage Regulator Castellated PTH pin pads Reset button Maximum 6V input : Electronics Amazon.com: SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) - Compatible with Arduino development board 5V/16MHz microcontroller AP2112 3.3V Voltage Regulator Castellated PTH pin pads Reset button Maximum 6V input : Electronics](https://m.media-amazon.com/images/I/61tOzu1GSJL._AC_UF894,1000_QL80_.jpg)
Amazon.com: SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) - Compatible with Arduino development board 5V/16MHz microcontroller AP2112 3.3V Voltage Regulator Castellated PTH pin pads Reset button Maximum 6V input : Electronics
![diymore Pro Micro Board ATmega32U4 5V/16MHz Module Board with 2 Row Pin Header for Arduino Leonardo - AliExpress diymore Pro Micro Board ATmega32U4 5V/16MHz Module Board with 2 Row Pin Header for Arduino Leonardo - AliExpress](https://ae01.alicdn.com/kf/Hfa44d0a8e2ef466b8b129e5f1a1cd084s/diymore-Pro-Micro-Board-ATmega32U4-5V-16MHz-Module-Board-with-2-Row-Pin-Header-for-Arduino.jpg)
diymore Pro Micro Board ATmega32U4 5V/16MHz Module Board with 2 Row Pin Header for Arduino Leonardo - AliExpress
![Pro Micro : how do I use a serial interface to communicate with a device? - Microcontrollers - Arduino Forum Pro Micro : how do I use a serial interface to communicate with a device? - Microcontrollers - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/4/5/e/45e867347c6871b4221a78c729fcfa170554d606_2_642x500.jpeg)