webrelay

http wrapper for operating a ControlByWeb relay device

api

• #setup.run(host, mac, callback) add an arp entry for host and test with ping
• #setup.arp(host, mac, callback) add an arp entry for host
• #setup.ping(host, callback) ping the given host
• #switch(host, breaker, state, callback) change the state of breaker to state and return the state of the relay (xml)
• #updateVariable(host, index, newVal, callback) update an external variable at index to newVal and return the state of the relay (xml)
• #state(host, callback) return the state of the relay (xml)

usage

the module is programmed to spy at environment variables and runtime arguments for configuration data. runtime arguments take precedence over environment variables and default values.

var webrelay = require('webrelay'),
    host = webrelay.config.RELAY_HOST,
    mac = webrelay.config.RELAY_MAC;

// initial set up
webrelay.setup.run(host, mac, function(err, res) {
  if (err) throw err;
  // relay is now accessible via config.RELAY_HOST
});

// toggle a breaker
webrelay.switch(host, 1, 1, function(err, res) {
  if (err) throw err;
  // breaker number 1's state is now 1
});

// update an external variable
webrelay.updateVariable(host, 0, 10, function(err, res) {
  if (err) throw err;
  // extVar0 value is now 10
});

// get the state back (in xml)
webrelay.state(host, function(err, res) {
  if (err) throw err;
  console.log(res);
});