Electroteach

D90 manual
58mm filter thread

I have observed instances where the words 'off of' are used. These words had no instant explanation for me. I eventually came up with the replacement 'from' to give the same meaning. {this posting needs rewording ...}
An example of this is :
Under section 'Battery life' in Review

unlock phone
unlock phone telstra

IMEI (International Mobile Equipment Identity) is a 15-17-digit code that is given to every mobile phone.

esp32-s2 docs
esp32-s2 docs - more

Marlin firmware

adshel bus shelters

what is platformio?

one of many places to acquire code for uArmSwiftPro

UP1300...

check out the following links
esp32-s2 info images
esp32-s2 pinouts
development kit : download and build from here

micropython firmware image

arduino library - how to make and use

tip 1
tip 2
tip 3
all-about-arduino-libraries-install