Arduino Mega
Screen and SD Reader
LCD 3.5 inch Arduino Mega2560
MAR3513 SD Datalog example
i2c 5v to 3v/5v level converter/splitter
MH Level Converter
Multiplexers
ShangSi MoudleCX TCA9548A i2c multiplexer
DFRobot i2c multiplexer
Sensors
seeĀ Sensors
Other
DIY 2.54 to 1.27 pin converter