Install

Single one-shot. No daemon, no systemd unit, no service to keep running.

Prerequisites

OpenEVSE WiFi firmware already configured to publish to the broker (mqtt_enabled:true, mqtt_connected:1 in /status JSON).
Broker reachable from the machine you're running this on.
uv installed and on $PATH (the script is a PEP-723 inline-deps script — uv resolves paho-mqtt and pyyaml on first run).

1. Verify OpenEVSE is publishing

mosquitto_sub -h <BROKER> -u <USER> -P <PASS> -t 'openevse/#' -W 5 -v

Expect a steady stream of openevse/{power,voltage,amp,...} plus retained openevse/announce/<id>, openevse/config, etc. If nothing arrives, the EVSE isn't talking to the broker — fix that first via the OpenEVSE web UI at http://<EVSE>/.

2. Preview the discovery payloads (optional)

~/solar/openevse/bin/openevse-publish-discovery --dry-run --device-id a048

Prints the 23 topics + JSON payloads it would publish without connecting.

3. Publish

Broker creds default-load from ~/.config/powermon/powermon.yaml:

~/solar/openevse/bin/openevse-publish-discovery

The tool reads the retained openevse/announce/<id> payload to discover the device id automatically. Override broker / device id if needed:

~/solar/openevse/bin/openevse-publish-discovery \
    --host 10.0.0.41 --user mqtt --password '...' \
    --device-id a048

Re-running is idempotent — the broker just overwrites the retained payloads in place.

4. Verify

The 23 retained discovery configs:

mosquitto_sub -h <BROKER> -u <USER> -P <PASS> \
    -t 'homeassistant/sensor/+/config' \
    -t 'homeassistant/binary_sensor/+/config' \
    -W 5 -F '[r=%r] %t' | grep openevse | sort -u

Expect 20 sensor + 3 binary_sensor entries, all [r=1].

In HA: Settings → Devices & Services → MQTT should show "OpenEVSE-a048" as a new device. If not, force a reload:

mosquitto_pub -h <BROKER> -u <USER> -P <PASS> \
    -t 'homeassistant/status' -m 'online'

HA listens on this topic and re-scans retained discovery on receipt.

Rollback

~/solar/openevse/bin/openevse-publish-discovery --purge

Publishes empty retained payloads to all 23 config topics; HA forgets the entities on next reload. The OpenEVSE-side openevse/<key> topics are not touched (they're not ours to clear).

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