Projector & HDMI

Brief:

Control the projector settings and HDMI input via an IOT device. It must:

• Turn the projector on and off

• Be capable of changing the onboard sound settings

• Incorporate a system to switch between two HDMI sources, (the projector only has one HDMI input)

Executive Summary:

• The system uses IOT to control the device.

• It uses MQTT protocol to publish and subscribe data.

• It uses IFTTT to bridge between MQTT and Alexa, Google Assistant and Mobile widgets.

• It uses ESP8266 chip to implement MQTT actions.

• It controls the projector over serial and the HDMI source using the Digital IO Channels of a modified HDMI switcher.