dirk

Door bell gateway integrating MQTT for Home Automation support. This has an interface in both directions, door bell signals from the push buttons are published on MQTT and it listens to events to turn on the bell or switch on the light.

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Dirk Jahnke bb86029452 Added Debouncer		2021-02-02 16:10:58 +01:00
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README.md	Added mqtt status message for output pins; moved output init to beginning of setup	2020-12-28 16:59:33 +01:00
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README.md

DoorBell-MQTT-Gateway

Based on

Arduino Uno
Ethernet interface using MQTT

Watchout for GPIO changes as triggers for

door bell input
mailbox observer (post entry)
mailbox observer (takeout posts)
light requests (button)

Serve outputs (using relays to trigger) for

turn light on at mailbox
turn bell sound on

MQTT messages:

doorBellTopic = "doorBellGW/doorbell" --> issued when pushbutton pressed: trigger / re-trigger / release
postboxFlapTopic = "doorBellGW/mailboxFlap" --> issued, when flap is opened to enter mail: trigger / re-trigger / release
postboxDoorTopic = "doorBellGW/mailboxDoor" --> issued, when mailbox door is opened to remove mail: trigger / re-trigger / release
doorBellTriggerSoundTopic = "doorBellGW/doorbellTrigger" --> listens to this message and turns on relay for a short time to trigger the bell/gong
doorLightRequestTopic = "doorBellGW/lightRequest" --> issued, when light pushbutton is pressed: trigger / re-trigger / release; light is turned on for 30 seconds
postboxLightTopic = "doorBellGW/light" --> listens to this message and turns light on at mailbox for 30 seconds
postboxLightStatusTopic = "doorBellGW/light/status" --> issued, when light at mailbox is turned on/off: on / off