The Cue testing devices are interesting. The Bluetooth, battery, and most of the interesting bits are all in a reusable device with a slot for single-use cartri

The Cue testing devices are interesting. The Bluetooth, battery, and most of the interesting bits are all in a reusable device with a slot for single-use cartridges. The cartridges are fairly dumb (other than the chemical stuff I think there's just an i2c chip)