photocellServer

slave/photocellServer.js

@@ -0,0 +1,75 @@
+/**
+ * Created by rpodiuc on 8/9/14.
+ */
+var http = require("http");
+var url = require("url");
+var express = require('express');
+var getRawBody = require('raw-body');
+var cors = require('cors');
+var gpio = require("pi-gpio");
+
+var argv = process.argv;
+var port = argv[2];
+var pin = argv[3];
+if (pin == undefined)
+  pin = 7;
+console.log("arguments are port", port, " pin", pin);
+var app = express();
+
+//handle post/put
+app.use(function (req, res, next) {
+  getRawBody(req, {
+    length: req.headers['content-length'],
+    limit: '1mb',
+    encoding: 'utf8'
+  }, function (err, string) {
+    if (err)
+      return next(err);
+    req.text = string;
+    next();
+  })
+});
+
+app.use(cors());
+
+function setDirection(pin){
+  console.log("I am in set dirrection");
+  gpio.open(pin, "input", function(err) {
+    console.log("---set direction to pin ", pin, " to input---");
+    console.log("---error is ------:", err);
+    setInterval(function(){readLightState(pin);},3000);
+    //gpio.setDirection(pin, "input" , function(){
+    //console.log("-----i am in set dirrection------");
+    //readLightState(pin, undefined);
+    //});
+  });
+}
+
+function readLightState(pin, res) {
+  gpio.read(pin,  function(err, value) {
+    console.log("READ pin------------------", pin, " value-----", value);
+    if(err) throw err;
+    console.log("on pin" +  pin + " state is: " , value);    // The current state of the pin
+    var state = value;
+    if (res !== undefined) {
+      console.log("send a response with led state:  ", value);
+      if (state == 1) {
+        res.send("something's there ^_^");
+      } else {
+        res.send("nothing detected");
+      }
+    }
+    return state;
+    //gpio.close(pin);
+  });
+}
+
+app.get("/", function(req, res) {
+  console.log("GET /,  led state is: ", ledState);
+  readLightState(pin, res);
+})
+
+
+app.listen(port);
+setDirection(pin);
+//startReading(pin);

slave/proximityServer.js

@@ -37,7 +37,7 @@ function setDirection(pin){
     setInterval(function(){readProximityState(pin);},3000);
     //gpio.setDirection(pin, "input" , function(){
     //console.log("-----i am in set dirrection------");
-    //readProximityState(pin, undefined);
+    //readLightState(pin, undefined);
     //});
   });
 }
@@ -56,6 +56,7 @@ function readProximityState(pin, res) {
           res.send("nothing detected");
         }
     }
+    return state;
     //gpio.close(pin);
   });
 }
@@ -65,13 +66,6 @@ app.get("/", function(req, res) {
   readProximityState(pin, res);
 })
 
-function startReading(pin)
-{
-  //setDirection(pin);
-  console.log("-----------proximity sensor on--------------");
-
-  setInterval(readProximityState(pin),3000);
-}
 
 app.listen(port);
 setDirection(pin);