feat: add Shelly EM3 Pro / Pro 3EM 3-phase power meter - #155
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New power meter package for the Shelly EM3 Pro / Pro 3EM (Gen2/Gen3 RPC API). Polls the meter over HTTP (`EM.GetStatus`) and publishes the arithmetic sum of the three phase active powers as the grid-exchange signal, matching how a 3-phase contract is billed (net metering). - adds solar_router/power_meter_shelly_em3.yaml (per-phase internal sensors, optional HTTP auth header) - adds docs (en/fr), install doc entry and mkdocs nav - adds esp32-em3-router.yaml example (triac + 1-dimmer engine)
XavierBerger
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Summary
New power meter package for the Shelly EM3 Pro / Pro 3EM three-phase energy meter (Gen2/Gen3 RPC API).
The meter is polled over HTTP (
EM.GetStatus) and the arithmetic sum of the three phase active powers is published as the grid-exchange signal (total_act_power), matching the way a 3-phase contract is billed (net metering): an export on one phase fully offsets an import on another.What's included
solar_router/power_meter_shelly_em3.yaml— polls every 2 s while activated; per-phase active powers exposed as internal sensors (show_phase_power: "True"to unhide); optional HTTPAuthorizationheader (power_meter_auth_header)docs/en/power_meter_shelly_em3.md+docs/fr/esp32-em3-router.yaml(EM3 + triac + 1-dimmer engine)docs/en+fr/installation.mdentry + mkdocs navNotes
esp_http_clientconnection each second, which can trigger a stale-transport use-after-free inside ESP-IDF'stcp_transportover hours (see comment in the package).esphome config(harness: common + em3 + triac + engine_1dimmer),check_documentation_coverage.sh,check_build_coverage.shand a strictmkdocs build.