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mirror of https://github.com/node-red/node-red-nodes.git synced 2023-10-10 13:36:58 +02:00
node-red-nodes/hardware/PiSrf
2021-06-18 08:56:15 +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 fixup pilter and pisrf for python2/3 2021-06-18 08:56:15 +01:00
pisrf.html SRF node - add ability to set time interval 2017-08-14 09:20:18 +01:00
pisrf.js fixup pilter and pisrf for python2/3 2021-06-18 08:56:15 +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

Usage

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.