Using Ultrasonic sensor with node-red

• First you need to install node-red-node-pisrf

• After you install node-pisrf already you will see rpi-srf in Raspberry Pi column. Then you just drag and drop as figure below:

• Then you need to connect Ultrasonic sensor with Raspberry Pi. You can connect as pin below:

• After connect Ultrasonic sensor with raspberry Pi already now back to the node-red and do as below:

Add debug and connect it as below:

• Add dashboard

• Double on gauge

• Then it will bring you into this dashboard page.

Now back to node-red and click on gauge again and change Units and Range and Deploy it again.

Then back to Dashboard page you will see