mirror of https://github.com/node-red/node-red-nodes.git synced 2023-10-10 13:36:58 +02:00

History

Dave Conway-Jones 2bd98c6887 add python 3 tests to most shell scripts		2021-05-09 17:42:26 +01:00
..
LICENSE	Update licenses and packages for all nodes	2016-11-06 20:26:19 +00:00
nrsrf	add python 3 tests to most shell scripts	2021-05-09 17:42:26 +01:00
nrsrf.py	piSRF - better handle timeouts, closing	2018-11-28 09:18:18 +00:00
package.json	add python 3 tests to most shell scripts	2021-05-09 17:42:26 +01:00
pisrf.html	SRF node - add ability to set time interval	2017-08-14 09:20:18 +01:00
pisrf.js	Allow a bunch of Pi nodes to be visible but not active when used not on a Pi	2018-04-15 11:24:56 +01:00
README.md	SRF node - add ability to set time interval	2017-08-14 09:20:18 +01:00

node-red-node-pisrf

A Node-RED node for Raspberry Pi to read range from an SRF05 Ultrasonic range sensor.

Only works with a Raspberry Pi.

Install

Run the following command in your Node-RED user directory - typically ~/.node-red

npm install node-red-node-pisrf

Raspberry Pi input from an SRF04 or SRF05 ultrasonic range finder.

The configuration requires two GPIO pin numbers, the trigger pin and the echo pin. These can be any spare valid Pi GPIO pins. e.g.

    7,11

You can also set the repeat frequency of measurements - default 0.5 seconds.

Outputs a msg.payload with a number representing the range in cm.

Produces one measure every 0.5s (by default) - but only if the distance is different from the previous reading.

Note: we are using the actual physical pin numbers on connector P1 as they are easier to locate.