the mini::grid provides mobile connectivity via the GSM/GPRS network, and location capabilities via GPS. it does so via the SIMCOM SIM868 module, which is a compact package that sees wide usage in edge devices. it implements the AT protocol.
with the mini::grid, we aimed to create a versatile extension to the mini::base for edge applications. it therefore has connector footprints for THT loom connectors which wire the power supply, CAN and some I/Os, it has a connector for a small display and it has connectors for external GSM/GPRS and GPS antennae. all connectors are industrial grade.
size is not the most important aspect for a development-style board. nonetheless we aimed to keep it compact yet robust, again with the goal of making the board::project line viable for more than just desk environments. as a visual aid and to ease integration, we decided to use the credit card form factor as a reference, and the mini stack is exactly half a credit card in footprint at 54.0mm x 42.5mm.