SMA speedwire multicast collector

This is a data collector for the SMA speedwire protocol. It is used and tested only with a SMA EMETER-20.

The inserter stores persisted data into a influxdb 1.x server protected by influxdb-guard.

Dependencies

sudo apt install libcurl4-openssl-dev libcmocka-dev

# only required for building the tests
sudo apt install libcmocka-dev

Build and install

Build release.

cd app
cmake -GNinja -B build -DCMAKE_BUILD_TYPE=Release
cmake --build build

Run against influxdb guard endpoint. The access token and the interface need to be adjusted.

./speedwire -u https://example.com/guard/write/ABCD?db=data -i eth0

Copy the systemd Unit-file to /etc/systemd/system

sudo systemctl daemon-reload
sudo systemctl enable speedwire
sudo systemctl start speedwire

Run tests

Build the test with address sanitizer enabled.

cd tests
cmake -GNinja -B build -DCMAKE_BUILD_TYPE=Release -DSANITIZER=address
cmake --build build

Run the tests.

./build/speedwire_tests

Firmware specifics

Firmware 2.0.18.R

• Packet size 600 bytes
• OBIS index difference to EMETER-Protokoll-TI-de-10 documentation
  • 33 l1_power_factor
  • 53 l2_power_factor
  • 73 l3_power_factor