This is a simple and easy to use SPI module for node.js.
I wrote this to have an easy way to control a Adafruit PWM LED driver with my Raspberry Pi (node-leddriver), but it should also work with different clients and hosts. It uses a CLK frequency of 500kHz.
npm install simplespi
var simplespi = require( "simplespi" ); var response = simplespi.send( "AA00FF", "/dev/spidev0.1" );
send method accepts a hexcode string as parameter and sends it to the SPI device defined in the optional second parameter.
If the second parameter is undefined it uses
The value returned is the response of the device in hexcode string form.
Testing on the Pi
First run the following on your Raspberry Pi (with
console.log(simplespi.send( "AA00FF" ));
It should return:
Then shortcut the
MOSI pins of your pi and run the same command again.
It should then return:
If you got this your SPI device is working.
Enabling SPI on the Pi
If it's still not working, check your
/etc/modprobe.d/raspi-blacklist.conf and comment out the entry:
by changing it to:
then reboot your pi and type
spidev0.0 is in the list you're fine and you can repeat the test.