One Fast Cat wheel + switch + C.H.I.P.

etc_init.d_S50fastcat

#!/bin/sh

# Quick start-stop-daemon example, derived from Debian /etc/init.d/ssh
set -e

# Must be a valid filename
NAME=fastcat
PIDFILE=/var/run/$NAME.pid
#This is the command to be run, give the full pathname
DAEMON=/home/root/fastcat.sh
DAEMON_OPTS=""

export PATH="${PATH:+$PATH:}/usr/sbin:/sbin"

case "$1" in
  start)
        echo -n "Starting daemon: "$NAME
        start-stop-daemon --start -b --quiet --pidfile $PIDFILE --exec $DAEMON -- $DAEMON_OPTS
        echo "."
        ;;
  stop)
        echo -n "Stopping daemon: "$NAME
        start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE
        echo "."
        ;;
  restart)
        echo -n "Restarting daemon: "$NAME
        start-stop-daemon --stop --quiet --oknodo --retry 30 --pidfile $PIDFILE
        start-stop-daemon --start -b --quiet --pidfile $PIDFILE --exec $DAEMON -- $DAEMON_OPTS
        echo "."
        ;;

  *)
        echo "Usage: "$1" {start|stop|restart}"
        exit 1
esac

exit 0

home_root_fastcat.sh

#!/bin/sh

sh -c 'echo 415 > /sys/class/gpio/export'

t1="$(awk 'NR==3 {print $3}' /proc/timer_list)"

while true; do
  v1=$(cat /sys/class/gpio/gpio415/value)
  if [ "$v1" = 0 ] && [ "$v2" = 1 ]; then
    t2="$(awk 'NR==3 {print $3}' /proc/timer_list)"

    timestamp="$(date +%s)"
    elapsed="$(expr "(" "$t2" - "$t1" ")" / 1000000)"

    echo "$timestamp\t$elapsed" >> fastcat.log
    wget -qO- --no-check-certificate "https://tonicdev.io/user/notebook/branches/master?timestamp=$timestamp&elapsed=$elapsed" &

    t1="$t2"
  fi
  v2=$v1
done

tonic.js

var pg = require("pg");

var config = {
    user: "USER",
    password: "PASSWORD",
    database: "DATABASE",
    host: "HOST",
    port: 5432,
    ssl: true
};

exports.tonicEndpoint = function(request, response) {
    var url = require('url').parse(request.url, true);
    var timestamp = parseInt(url.query.timestamp, 0);
    var elapsed = parseInt(url.query.elapsed, 0);
    pg.connect(config, function(err, client, done) {
        if(err) {
            return response.end(JSON.stringify({ error: 'error fetching client from pool' }));
        }
        client.query('INSERT INTO cat_wheel VALUES ($1, $2)', [timestamp, elapsed], function(err, result) {
            //call `done()` to release the client back to the pool
            done();

            if(err) {
                return response.end(JSON.stringify({ error: 'error running query: ' + err }));
            }
            response.end(JSON.stringify({ elapsed, timestamp }));
        });
    });
}