GuySawyer

Jessie has moved away from sysvinit and onto systemd. Writing an init script to /etc/init.d/ is outdated,
and a bit tedious since you have to handle the start/stop/restart logic yourself (if you want those capabilities).

New Method:

1. Write a unit file for systemd.
$ sudo nano /etc/systemd/system/your_jar_software.service

  [Unit]
  Description=Example on starting a JAR with systemd

GuySawyer

1. Setup Bluetooth on Raspberry Pi 3:
https://hacks.mozilla.org/2017/02/headless-raspberry-pi-configuration-over-bluetooth/

2. Add these lines to startupScript in 1 to start bluetooth as discoverable:
#make bluetooth discoverable
sudo hciconfig hci0 piscan

3a. Install Python script which will receive wifi creds over bluetooth and write them to the necessary files:
https://github.com/brendan-myers/rpi3-wifi-conf

GuySawyer

Flashing Atmega from Arduino IDE over wifi

Error: 

$ Can't export GPIO 19, already exported/busy?: Invalid argument
$ avrdude done.  Thank you.


Solution:
Avrdude v6.3-1 on the Omega has known issues.