EVSEMaster Charger — Indigo Plugin

Control and monitor EVSE chargers that use the EVSEMaster app/protocol directly from Indigo. This plugin talks to the charger over your local network and exposes rich real‑time status, per‑phase telemetry, and control actions.

• Start/Stop charging (mapped to Indigo relay On/Off)
• Set the output current limit (Amps)
• Live device status and charging session details
• Human‑readable state names and summaries for control pages and triggers
• Conservative polling that complements the charger’s push events

This plugin uses the evsemaster Python library by RafaelSchridi (based on johnwoo‑nl/emproto).

Supported EVSE

Any charger that uses the EVSEMaster app/protocol should work. Confirmed models reported by users include variants branded as BS20/Telestar, etc. If yours speaks EVSEMaster, it will likely work.

How it works

• Transport: UDP socket listening on 28376; the charger’s reply/discovered port is learned at runtime (initially 7248).
• Authentication: Login with your EVSE’s 6‑digit PIN is required for control operations. The charger will still push unsolicited status events even if login fails, so the plugin will remain in a safe passive “listen” mode until it can authenticate.
• Polling: A single periodic status refresh runs every 60 seconds. Most updates arrive via push events.
• Fault‑tolerant: If login briefly fails, the plugin backs off and will retry opportunistically without tearing down the transport or spamming the log.

Requirements

• Indigo 2024.2 or later (Server API 3.6+)
• Python 3 (bundled with Indigo)

Installation

1. Double‑click the bundle to install/enable it in Indigo.
2. In Indigo, create a new device:
   • Type: EVSE Charger (from this plugin)
   • Enter:
     • IP/Hostname of the charger
     • 6‑digit PIN (the EVSE’s login PIN)

Once created: - The plugin will open a UDP listener and attempt a login. - Even if login fails, you’ll still see status updates if the EVSE pushes them. - A modest periodic status request (60s) runs when authenticated.

Control: - Relay On → Start Charging - Relay Off → Stop Charging - Actions (Action Groups): Start Charging, Stop Charging, Set Output Amperage

Actions

• Start Charging
• Stop Charging
• Set Output Amperage (6–32 A)
  • Enforced against device capabilities.

Relay mapping: - Turn On = Start Charging - Turn Off = Stop Charging - Toggle = Start/Stop according to current charging state

Device states

Human‑readable labels are provided for Indigo triggers and control pages.

Connection and summary: - connected (bool) — transport/socket established - auth_ok (bool) — authenticated (logged in) - status_text (string) — concise status - state_summary (string) — “Current State | Plug: …” - last_update (string) - last_error (string, if any) - vehicle_connected (bool) - charging (bool) - onOffState (bool) — mirrors charging

Device Info (EvseDeviceInfo): - di_type (int) - di_brand (string) - di_model (string) - di_hardware_version (string)

Initial Release.

Installation Double‑click the bundle to install/enable it in Indigo. In Indigo, create a new device: Type: EVSE Charger (from this plugin) Enter: IP/Hostname of the charger 6‑digit PIN (the EVSE’s login PIN) Once created:

The plugin will open a UDP listener and attempt a login. Even if login fails, you’ll still see status updates if the EVSE pushes them. A modest periodic status request (60s) runs when authenticated. Control:

Relay On → Start Charging Relay Off → Stop Charging Actions (Action Groups): Start Charging, Stop Charging, Set Output Amperage Actions Start Charging Stop Charging Set Output Amperage (6–32 A) Enforced against device capabilities.