Raspberry Pi Safe Reboot and Shutdown Button
Contributors:
bboyho
bboyho 
Resources & Going Further
For more resources, check out the links below:
- GitHub Repo
- eLinux.org Wiki: Wake from Halt - For certain versions, you can wake the Pi up by shorting pins together rather than disconnecting the power supply. However, caution is advised as these GPIO pins are adjacent to the power pins. You would want to solder a button to the pins to avoid accidentally shorting the power pins.
Need some inspiration for your next project? Check out the Pi AVR Programmer! We implement a shutdown code after programming and testing boards.
Raspberry Pi Stand-Alone Programmer
This tutorial will show you how to use a headless Raspberry Pi to flash hex files onto AVR microcontrollers as a stand-alone programmer. It also tells the story about production programming challenges, how SparkFun came to this solution, and all the lessons learned along the way.
Pi AVR Programmer HAT Hookup Guide
In this tutorial, we will use a Raspberry Pi 3 and the Pi AVR Programmer HAT to program an ATMega328P target. We are going to first program the Arduino bootloader over SPI, and then upload an Arduino sketch over a USB serial COM port.
Or check out some of these related tutorials:
Raspberry Pi 3 Starter Kit Hookup Guide
Guide for getting going with the Raspberry Pi 3 Model B and Raspberry Pi 3 Model B+ starter kit.
Using the PSoC 6 Pioneer Board with the Pioneer IoT Add-on Shield
Cypress's PSoC 6 Pioneer Board is a development tool for the powerful PSoC 6 processor. In this tutorial, we'll show you how to use the PSoC 6 Pioneer Board along with the SparkFun/Digi-Key Pioneer IoT Add-on Shield to send data to a Raspberry Pi via BLE or WiFi.
Pi AVR Programmer HAT Hookup Guide
In this tutorial, we will use a Raspberry Pi 3 and the Pi AVR Programmer HAT to program an ATMega328P target. We are going to first program the Arduino bootloader over SPI, and then upload an Arduino sketch over a USB serial COM port.
RP2040 Thing Plus Hookup Guide
Want to take a stab at advancing your programming skills? Check out the Thing Plus - RP2040, with the first microcontroller from the Raspberry Pi Foundation. This guide will get you started working with the RP2040 and programming in MicroPython and C/C++.