diff --git a/.env.example b/.env.example
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+# Copy this file to .env and adjust values for your environment.
+
+# MQTT connection
+MQTTHOST=localhost
+MQTTPORT=1883
+MQTTUSR=
+MQTTPWD=
+TOPIC=sonoff
+
+# Optional API protection for /switch/* endpoints.
+# Leave empty to disable token auth.
+SWITCH_API_TOKEN=