Everything is really starting to come together now! On the fall detection side of things, we built a test rig to hold the accelerometer and a spare Arduino, for calibrating the axes and doing some drop tests. This was constructed from Lego bricks, which have the advantages of being quick to assemble and disassemble, and keeping everything at known right angles.

A Lego test rig holds the accelerometer and an Arduino

The "X" on the front is to remind us that the positive X axis is in that direction.

 

We also bought a SIM card so that the GSM module can talk to the cell network, and wrote the code that will let the Arduino send and receive data from the GSM module.

The new SIM card inserted into the GSM module.

The Arduino MKR1000 connected to the GSM module so that it can communicate over the cell network.