Sometimes you can not install your Sonoff Basics and Power Supplies close to your LEDs. Of course you can easily extend the power and data cables you will have a problem if the 'Data' wire is too long.
Pretty much all addressable LEDs need a 5volt level on the data wire. While most will work fine if they are commanded by the 3.3volts coming out of an ESP chip, longer cables will drop this 3.3volt signal too much. Making for some frustrating colour and effect issues.
In this video I show you two ways of making a cheap 'Logic Level Shifter' to boost the 3.3volt signal back up to a nice healthy 5volts of the 'Data' wire.