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

Topic		Replies	Views
HC-SR04 Ultrasonic Sensor - rpi-srf - status not available General	10	2912	6 March 2020
Node-red:rpi-gpio.status.not-available General node-red-dashboard	22	183	6 June 2024
Raspberry pi4 rpi-gpio.status.not-available using HC-SR04 pisrf library General raspberry-pi	12	141	9 July 2024
HC-SR04 ultrasonic sensor - manual function General	5	1702	29 November 2021
Reading data from an ultrasonic sensor General node-red-node-serialport	6	69	4 November 2024

Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

Ultrasonic sensor object detection

Related topics