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September 15, 2017 AT 6:00 am

Raspberry Pi 3 BLE Cat Door @Raspberry_Pi #PiDay #RaspberryPi

Ble cat door v1MulB1LTI

Awesome project and write-up from Jeremiah Mattison up on Hackster.io.

The goal of this project is to build an IoT style motorized pet door so we can control which animals can come into the house. For this we are using BLE tags attached to the animals (cats) and the built-in Bluetooth module on the Raspberry Pi 3 which scans for the tags. We also have some indicator LEDs on the Raspberry Pi 3 for troubleshooting what state the door is supposed to be in.

The Node-RED BLE Scan node continuously scans for BLE advertisements. If it sees one that matches the device name and minimum RSSI it will open the pet door, and after a timeout period it will close the door. In order to prevent the door from closing prematurely on a slow-moving animal, the system will reset the timer whenever it gets a BLE match.

Read more.


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