diff --git a/README.md b/README.md
index 98954ef..45610e2 100644
--- a/README.md
+++ b/README.md
@@ -200,6 +200,7 @@ MQTT is a lightweight client-server publish/subscribe messaging protocol, optimi
 * [HS100toMQTT](https://github.com/dersimn/HS100toMQTT) - Gateway between TPLink HS100/HS110 and MQTT.
 * [ipcam2mqtt](https://github.com/svrooij/ipcam2mqtt) - A small ftp server to receive movement images from ipcameras and turn them into mqtt alerts.
 * [knx2mqtt](https://github.com/owagner/knx2mqtt) - Interface between the KNX home automation standard and MQTT.
+* [mcsMQTT](https://shop.homeseer.com/products/mcsmqtt-software-plug-in-for-hs3) - Plug-in for HS3 (HomeSeer).
 * [mqtt2homekit](https://github.com/forty2/mqtt2homekit) - Roughly the opposite of [homekit2mqtt](https://github.com/hobbyquaker/homekit2mqtt): Control your HomeKit-enabled devices with MQTT and without Siri or iPhone.
 * [mqtt-dss-bridge](https://github.com/cgHome/mqtt-dss-bridge) - MQTT digitalSTROM-Server Bridge.
 * [node-lox-mqtt-gateway](https://github.com/alladdin/node-lox-mqtt-gateway) - Gateway for Loxone™ mini server to communicate with MQTT broker.