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Initial implementation: MQTT-based energy meter subscriber

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Subscribes to Eastron SDM630 power meter data via MQTT broker,
decodes Modbus RTU frames, and writes readings to InfluxDB.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Thomas Klaehn
2026-04-10 08:01:17 +02:00
commit 066fa5ca51
10 changed files with 742 additions and 0 deletions
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config/config.json Normal file
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{
"broker": "EnergyMqtt-perimica-nxktq.local",
"port": 8883,
"client_id": "energy-subscriber",
"topic_prefix": "Energy",
"sample_rate": 10,
"influxdb_host": "p5.local",
"influxdb_port": 8086,
"influxdb_token": "hDu4JYvxciHsohn7zE0nyZfejZDik3s8fqxCkTebW1LRekckyGX_U0-wsfEcDuDV5WZER3MjQDss01jJJCeZBA==",
"influxdb_org": "tkl",
"influxdb_bucket": "home",
"ca_cert": "/srv/energy/meter/Energy-root-ca.crt",
"client_cert": "/srv/energy/meter/Energy-admin_user.crt",
"client_key": "/srv/energy/meter/Energy-admin_user.key",
"devices": [
{
"slave_address": 1,
"name": "Power_House",
"segment": "modbus-segment",
"registers": [
{"name": "L1PowerW", "type": "input", "address": 12, "count": 2, "factor": 1, "unit": "W"},
{"name": "L2PowerW", "type": "input", "address": 14, "count": 2, "factor": 1, "unit": "W"},
{"name": "L3PowerW", "type": "input", "address": 16, "count": 2, "factor": 1, "unit": "W"},
{"name": "TotalImport", "type": "input", "address": 72, "count": 2, "factor": 1, "unit": "kWh"},
{"name": "TotalExport", "type": "input", "address": 74, "count": 2, "factor": 1, "unit": "kWh"}
]
},
{
"slave_address": 2,
"name": "Power_Barn",
"segment": "modbus-segment",
"registers": [
{"name": "L1PowerW", "type": "input", "address": 12, "count": 2, "factor": 1, "unit": "W"},
{"name": "L2PowerW", "type": "input", "address": 14, "count": 2, "factor": 1, "unit": "W"},
{"name": "L3PowerW", "type": "input", "address": 16, "count": 2, "factor": 1, "unit": "W"},
{"name": "TotalImport", "type": "input", "address": 72, "count": 2, "factor": 1, "unit": "kWh"},
{"name": "TotalExport", "type": "input", "address": 74, "count": 2, "factor": 1, "unit": "kWh"}
]
}
]
}