ecmread.py and parseecmpower

• ECM can send ASCII data, but only at 0.5Hz. 1Hz refresh rate is obtained by sending binary updates.

• Ecmread.py decodes the binary, computes the positive and negative counters.

• Ecmread.py can do basic data uploading to some cloud services, but not recommended due to possible data glitches. It does not track historical data at parsing time (stateless logging).

• Parseecmpower reads logged data, filters out bad data samples due to serial port glitches as well as counter jumps and resets.

• Raw data stored on disk can be used by parseecmpower to be (re-)parsed and uploaded to cacti, or any cloud service (current data and old data can be back-filled).