Hello im new in using raspberry pi and node-red and i am doing a smart parking project using ultrasonic sensors. How can I use node-red with an ultrasonic sensor to detect the car if the spot is taken or not and get results and publish it in a website?

If you add a switch node - you can check the values coming from the pisrf node and send them to one output if its 5cm or less and another output otherwise. You can then use change nodes, on each output, to change the message from a number to occupied or available

cymplecy 1 April 2020 10:58 9

try the node-red-contrib-pisrf node

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Ultrasonic sensor object detection

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