real time filtering in obspy.realtime?

Dear Obspy-ers:

Being new to both python and the obspy project, I want to start by
saying how much I have enjoyed using the tools in the Gallery for
previously recorded waveforms in the last weeks. Our waveforms are
recorded by our slinky seismometers for schools:

In addition to the sensor, we build an interface that does the AD
conversion and some filtering using the arduino uno. Tons of fun, but
here comes my question:

Is there anyone in the community that can guide us to a real-time
filter that can boost our lows, with as little delay time as possible?
I was hoping the obspy.realtime folks would have some suggestions. The
eventual filter would not be in python, but in the arduino uno
software, called a "sketch."

Kasper van Wijk