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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
Dave Conway-Jones 68ba586074
add check for python3 lib
to close #865
2021-12-08 09:38:50 +00:00
..
LICENSE Update licenses and packages for all nodes 2016-11-06 20:26:19 +00:00
nrsrf PiSrf: Added decimal places option + stop bugfix + more keywords (#816) 2021-07-08 08:32:55 +01:00
nrsrf.py PiSrf: Added decimal places option + stop bugfix + more keywords (#816) 2021-07-08 08:32:55 +01:00
package.json add check for python3 lib 2021-12-08 09:38:50 +00:00
pisrf.html PiSrf: Added decimal places option + stop bugfix + more keywords (#816) 2021-07-08 08:32:55 +01:00
pisrf.js add check for python3 lib 2021-12-08 09:38:50 +00:00
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.