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229 lines (210 loc) · 8.89 KB
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/**
* Heavily based on core\io\25-serial.js
*
* Copyright 2013,2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
module.exports = function(RED) {
"use strict";
var settings = RED.settings;
var events = require("events");
var util = require("util");
var serialp = require("serialport");
var bufMaxSize = 32768; // Max serial buffer size, for inputs...
var xbee_api = require("xbee-api");
// TODO: 'xbeePool' should be encapsulated in SerialPortNode
function XbeeAPINode(n) {
RED.nodes.createNode(this,n);
this.serialport = n.serialport;
this.serialbaud = parseInt(n.serialbaud) || 9600;
}
RED.nodes.registerType("xbee-api",XbeeAPINode);
function XbeeAPIOutNode(n) {
RED.nodes.createNode(this,n);
this.serial = n.serial;
this.serialConfig = RED.nodes.getNode(this.serial);
var C = xbee_api.constants;
if (this.serialConfig) {
var node = this;
node.xbee = xbeePool.get(this.serialConfig.serialport,
this.serialConfig.serialbaud
);
node.on("input",function(msg) {
var addr = node.destination || msg.payload.destination64; // || 0013a20040aa18df [0x00, 0x13, 0xa2, 0x00, 0x40, 0xaa, 0x18, 0xdf]
if (addr) {
msg.payload.destination64 = addr;
var payload = msg.payload;
if (!Buffer.isBuffer(payload)) {
// not buffer so buildFrame
payload.type = C.FRAME_TYPE[payload.type];
payload = node.xbee.xbee.buildFrame(payload);
node.xbee.write(payload,function(err,res) {
if (err) {
node.error(err);
}
});
} else {
// send direct if we receive a buffer
node.xbee.write(payload, function(err, res) {
if (err) {
node.error(err);
}
})
}
}
});
node.xbee.on('ready', function() {
node.status({fill:"green",shape:"dot",text:"connected"});
});
node.xbee.on('closed', function() {
node.status({fill:"red",shape:"ring",text:"not connected"});
});
} else {
this.error("missing serial config");
}
this.on("close", function(done) {
if (this.serialConfig) {
xbeePool.close(this.serialConfig.serialport,done);
} else {
done();
}
});
}
RED.nodes.registerType("xbee-api out",XbeeAPIOutNode);
function XbeeAPIInNode(n) {
RED.nodes.createNode(this,n);
this.serial = n.serial;
this.serialConfig = RED.nodes.getNode(this.serial);
this.xbee = n.xbee;
if (this.serialConfig) {
var node = this;
node.tout = null;
var buf;
if (node.serialConfig.out != "count") { buf = new Buffer(bufMaxSize); }
else { buf = new Buffer(Number(node.serialConfig.newline)); }
node.status({fill:"grey",shape:"dot",text:"unknown"});
node.xbee = xbeePool.get(this.serialConfig.serialport,
this.serialConfig.serialbaud
);
this.xbee.on('data', function(msg) {
var newMsg = { "source": msg.remote64, "payload": msg };
node.send(newMsg);
});
} else {
this.error("missing serial config");
}
this.on("close", function(done) {
if (this.serialConfig) {
xbeePool.close(this.serialConfig.serialport,done);
} else {
done();
}
});
}
RED.nodes.registerType("xbee-api in",XbeeAPIInNode);
var xbeePool = function() {
var connections = {};
return {
get:function(port,baud,callback) {
var id = port;
if (!connections[id]) {
connections[id] = function() {
var obj = {
_emitter: new events.EventEmitter(),
serial: null,
_closing: false,
tout: null,
xbee: null,
on: function(a,b) { this._emitter.on(a,b); },
close: function(cb) { this.serial.close(cb); },
write: function(m,cb) { this.serial.write(m,cb); }
}
var setupXbee = function() {
obj.xbee = new xbee_api.XBeeAPI({
api_mode:2,
module: "ZigBee"
});
obj.xbee.on('frame_object', function (frame) {
obj._emitter.emit('data',frame);
});
obj.serial = new serialp.SerialPort(port,{
baudrate: baud,
parser: obj.xbee.rawParser()
},true, function(err, results) { if (err) { obj.serial.emit('error',err); } });
obj.serial.on('error', function(err) {
util.log("[xbee] serial port "+port+" error "+err);
obj._emitter.emit('closed');
obj.tout = setTimeout(function() {
setupXbee();
}, settings.serialReconnectTime);
});
obj.serial.on('close', function() {
if (!obj._closing) {
util.log("[xbee] serial port "+port+" closed unexpectedly");
obj._emitter.emit('closed');
obj.tout = setTimeout(function() {
setupXbee();
}, settings.serialReconnectTime);
}
});
obj.serial.on('open',function() {
util.log("[xbee] serial port "+port+" opened at "+baud+" baud ");
if (obj.tout) { clearTimeout(obj.tout); }
//obj.serial.flush();
obj._emitter.emit('ready');
var frame = {
"type": 0x08,
"command": "ND",
"commandParameter": []
}
obj.serial.write(obj.xbee.buildFrame(frame));
});
obj.serial.on("disconnect",function() {
util.log("[xbee] serial port "+port+" disconnected");
});
}
setupXbee();
return obj;
}();
}
return connections[id];
},
close: function(port,done) {
if (connections[port]) {
if (connections[port].tout != null) {
clearTimeout(connections[port].tout);
}
connections[port]._closing = true;
try {
connections[port].close(function() {
util.log("[xbee] serial port closed");
done();
});
}
catch(err) { }
delete connections[port];
} else {
done();
}
}
}
}();
RED.httpAdmin.get("/xbeeports",function(req,res) {
serialp.list(function (err, ports) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.write(JSON.stringify(ports));
res.end();
});
});
}