Arduino MKR Relay Proto Shield ready-to-mount it is otherwise identical in

it is otherwise identical in code and size

tested and assembled in the USA with many of its components built in the US as well

It is possible to write your own CPU

Your code will still work

ModalAI has a stand-alone USB carrier and an add-on for VOXL that support this Microhard modem module

Arduino MKR Relay Proto Shield ready-to-mount it is otherwise identical inThe MKR Relay Protoshield allows you to easily add relays to your MKR board based project. The shield provides two relays (Datasheet) called RELAY1 and RELAY2 commanded by pin 1 and pin 2 respectively. The shield also provides an easy connection by means of screw terminal blocks to A1 to A4 analog inputs, I2C and supply voltages. Operating voltage 3. 3V (supplied from the host board) Two relays with NO, COM and NC connections Works with battery