GitHub

rosserial_arduino: cmake build hex file location

Upon closer inspection before running the avrdude command cmake enters "/build/helloworld/firmware" which is not where the hex file is. I am building using "catkin_make helloworld_firmware_hello" and ...
GitHub

This project allows you to run automated scripts using Arduino Uno R3 (or other ATmega16u2-based device) for Pokemon ZA automated shiny hunting.

Use your preferred AVR programmer to flash the resulting .hex file to your Arduino Uno R3. For how to flash the .hex file to Arduino Uno R3, check Updating the Atmega8U2 and 16U2 on an Uno or Mega2560 ...
EDN

Bootload an ATmega Microcontroller & Build Your Own Arduino – 2

Since you lacked the USB interface in your own Arduino board, it becomes necessary to use a homemade/ready-made USB to Serial Converter Module as an efficient and economical solution. Inexpensive and ...