Example website for receiving MQTT messages
Web demo with Paho Javascript client https://eclipse.org/paho/clients/js/
The MQTT broker must have Websocket enabled. A public available broker is HiveMQ http://www.hivemq.com/showcase/public-mqtt-broker/
Use Blood Pressure Companion for Android to send messages https://play.google.com/store/apps/details?id=de.medando.bloodpressurecompanion