SMA-EM

SMA Energymeter measurement

sma-em-measurement.py: Python3 loop display SMA Energymeter measurement values

sma-daemon.py: Python3 daemon writing regard and surplus values to /run/shm/em-[serial]-[value]

Requirements

python3 sys time configparser (SafeConfigParser) signal

Configuration

create a config file in /etc/smaemd/config
Use UTF-8 encoded configfile
Example:

[SMA-EM]
# serials of sma-ems the daemon should take notice
# seperated by space
serials=123456 1900204522
# features could filter serials to, but wouldn't see serials if these serials was not defines in SMA-EM serials
# list of features to load/run
features=simplefswriter sample

[DAEMON]
pidfile=/run/smaemd.pid
# listen on an interface with the given ip
# use 0.0.0.0 for any interface
ipbind=192.168.8.15
# multicast ip and port of sma-datagrams
# defaults
mcastgrp=239.12.255.254
mcastport=9522

# each feature/plugin has its own section
# called FEATURE-[featurename]
# the feature section is required if a feature is listed in [SMA-EM]features

[FEATURE-simplefswriter]
# list serials simplefswriter notice
serials=1900204522
# measurement vars simplefswriter should write to filesystem (only from smas with serial in serials)
values=pregard psurplus qsurplus ssurplus

[FEATURE-sample]
nothing=here

Routing

maybe you have to add a route (example: on hosts with more than one interface)

sudo ip route add 224.0.0.0/4 dev interfacename

Install / Copy (tested on Raspbian 9.1)

apt install git
apt install python3 cl-py-configparser
mkdir /opt/smaemd/
mkdir /etc/smaemd/
cd /opt/smaemd/
git clone https://github.com/datenschuft/SMA-EM.git .
cp systemd-settings /etc/systemd/system/smaemd.service

create a /etc/smaemd/config - file (see example above)
update systemd

systemctl daemon-reload
systemctl enable smaemd.service
systemctl start smaemd.service

feel lucky and read /run/shm/em--