pyHan

Simple Python library to decode data from the HAN port on Norwegian electricity meters.

This library is based on the C library found here: https://drive.google.com/drive/folders/0B3ZvFI0Dg1TDbDBzMU02cnU0Y28

The library tries to make is realy easy to decode data on the HAN port.

Simple serial HAN decoder:

from HAN import readHan
import serial

with serial.Serial('/dev/ttyUSB0', 2400, timeout=5) as ser:
    while True:
        han = readHan(ser)
        print("{} Watt".format(han.data["act_pow_pos"]))

Decode messages from file:

from HAN import readHan
with open(file, "rb") as ser
    while True:
        try:
            han = readHan(ser)
            print("{} Watt".format(han.data["act_pow_pos"]))
        except EOFError as e:
            # End Of File
            break
        except Exception as e:
            # Unable to decode message
            continue

Asyncio Applicaton: The library have been updated to support python3 asyncio and an application that supports shipping data to a influxdb server, runs a really simple http api server and a TCP Socket server have been created as a proof of concept.

to use this: edit config.yml with your settings and remove the config blocks for services that is not needed start the application with

python3 -m pyhan

Install dependencies with

python3 -m pip install aiohttp pyserial pyserial-asyncio aioinflux pyyaml 
```

For a more complete example se `serialHan.py` and `influxUploader.py`

## InfluxUploader.py
Sample script to upload Usage data to influxDB

usage: `python3 pyinfluxUploader.py --influxserver server.ip.address --username user --password pass --database database`


# Tested

For now extensive testing is not completed, and the library is only tested on the `Kaifa MA304H4` meter.
Also only messagetype 1 and 2 is tested for now