Optiboot subtree for MightyCore, MegaCore, MiniCore and MajorCore

If you have a private powerwall of 18650 cells, this is the battery management system you need. The small PCB is equipped with the cheap Arduino Nano.

An AVR & Arduino GSM OTA Bootloader for IoT devices

Arduino IDE Board Manager module for Atmel atmega Xplained minis

Arduino Nano substitute for a RS485 3 Phase DTSU666-H coil based power meter. Less resolution, but better display

Write permanent data in flash memory at run-time on Arduino Mega 2560.

Softcore microcontroller with peripherals based on PicoRV32

assembler rewrite of Optiboot for ATmega microcontrollers with extended functionality

Automatyczne resetowanie arduino Mega 2560 do przogramowania przez serial WiFi / LAN

Reliable Bluetooth OTA upload of an Arduino pro using an HC-05