SDI-12 + GPS module

After some development, I am glad to show a prototype of an SDI-12 + GPS USB module. This module incorporates the following features:

1. USB connection
2. SDI-12 translator with 4 SDI-12 connections (on a single SDI-12 bus)
3. Header for a GPS module
4. External power connection for sensors that need more than 5V from USB
5. External power/5V USB selection jumper
6. You can also use other serial devices or sensors such as Maxbotix serial sonic ranger, with some modification to the firmware
7. Both SDI-12 senors and GPS are addressed like SDI-12 sensors, for easy integration of GPS signal into your existing SDI-12 logging scripts

Here is a picture:

I ran out of GPS modules. New ones are on the way. Once I get them, I’ll solder one on an adapter and do a demo video.