The first thing you have to be careful about, especially when you are not used to the Arduino IDE, is to check carefully if you can inject a simple sketch on your target that you want to transform ...

Two Arduino cards (for example a nano, and a Nano Pro). A soldering iron (the tTS_100 found in all Chinese stores is a good compromise) A little soldering wire And thin cable (awg26-30) Open the PSNee ...