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Software/Scratch/s2pifiles/piGrovePiExtension.js

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+// Modified piGPIOExtension.js for GrovePi
+// Ver 2.25Feb18 
+new (function() {
+    var ext = this;
+    var fs = require('fs');
+    var websocket;
+    var sensorSplit; 
+    var sensorDict = {};
+    var variableDict = {};
+
+
+    function doConnect() 
+    {
+      websocket = new WebSocket('ws://localhost:8000/')
+      websocket.onopen = function(evt) { onOpen(evt) }
+      websocket.onclose = function(evt) { onClose(evt) }
+      websocket.onmessage = function(evt) { onMessage(evt) }
+      websocket.onerror = function(evt) { onError(evt) }
+      console.log('websocket connected from piGrovePiExtension')
+    }
+
+    function onOpen(evt) {
+      console.log('websocket opened')
+    }
+
+    function onClose(evt) {
+      console.log('websocket closed')
+    }
+
+    function onMessage(evt) {
+      var data = evt.data
+      console.log('msg from sgh:' + data)
+      sensorSplit = data.split(":");
+      sensorDict[sensorSplit[0]] = sensorSplit[1];
+      // console.log('sensorDict=' + JSON.stringify(sensorDict))
+    }
+
+    function onError(evt) {
+      var error = evt.data
+      console.log('websocket error', error);
+      
+      websocket.close();
+    }
+
+    function sendMessage(message) {
+      websocket.send(message);
+      console.log('msg to sgh:' + message)
+    }
+
+    function doDisconnect() {
+      websocket.close();
+     }
+     
+
+
+    doConnect();
+
+    // Cleanup function when the extension is unloaded
+    ext._shutdown = function ()
+    {
+        for (pin = 2; pin < 28; pin++)
+        {
+            if (fs.existsSync("/sys/class/gpio/gpio" + pin))
+                fs.writeFileSync("/sys/class/gpio/unexport", pin, "utf8");
+        }
+    };
+
+    // Status reporting code
+    // Use this to report missing hardware, plugin or unsupported browser
+    ext._getStatus = function ()
+    {
+        return {status: 2, msg: 'Ready'};
+    };
+
+    ext.set_gpio = function (pin, val) 
+    {
+        if (pin === '' || pin < 0 || pin > 27) return;
+
+        var dir = 0, lev;
+        if (val == 'output high') lev = 1;
+        else if (val == 'output low') lev = 0;
+        else dir = 1;
+
+		// check the pin is exported
+		if (!fs.existsSync("/sys/class/gpio/gpio" + pin)) 
+
+			fs.writeFileSync("/sys/class/gpio/export", pin, "utf8");
+
+		// the ownership of direction takes time to establish, so try this until it succeeds
+		while (true)
+		{
+			try {
+				fs.writeFileSync("/sys/class/gpio/gpio" + pin + "/direction", dir == 0 ? "out" : "in", "utf8");
+				break;
+			}
+			catch (error) {
+				continue;
+			}
+		}
+
+		// set the output value
+        if (dir == 0)
+            sendMessage('pin ' + pin + ' = ' + (lev == 1 ? "1" : "0"));
+            fs.writeFileSync("/sys/class/gpio/gpio" + pin + "/value", lev == 1 ? "1" : "0", "utf8");
+    };
+  
+    ext.get_gpio = function (pin) 
+    {
+        if (pin === '' || pin < 0 || pin > 27) return;
+
+		// check the pin is exported
+		if (!fs.existsSync("/sys/class/gpio/gpio" + pin)) 
+			fs.writeFileSync("/sys/class/gpio/export", pin);
+
+		// read the pin value
+		var data = fs.readFileSync ("/sys/class/gpio/gpio" + pin + "/value", 'utf8');
+
+		if (data.slice(0,1) == "1") return true;
+		else return false;
+    };
+    
+//my code
+
+    ext.send_broadcast1 = function (bmsg1 ,bmsg2) 
+    {
+        sendMessage('broadcast "' + bmsg1 + bmsg2 + '"');
+    };
+
+    ext.send_broadcast2 = function (bmsg1 ,bmsg2,bmsg3) 
+    {
+        sendMessage('broadcast "' + bmsg1 + bmsg2 + bmsg3 + '"');
+    };
+    
+    ext.send_broadcast0 = function (bmsg1) 
+    {
+        sendMessage('broadcast "' + bmsg1 + '"');
+    };
+
+    ext.get_sensorMsgs = function (sensorName) 
+    {
+    console.log(sensorName.toLowerCase() + ':' + sensorDict[sensorName.toLowerCase()])
+    //fs.writeFileSync("/home/pi/GrovePiSensors.json", JSON.stringify(sensorDict), "utf8");
+    return sensorDict[sensorName.toLowerCase()];
+    };
+
+    
+    // Block and block menu descriptions
+    var descriptor = {
+        blocks: [
+
+            [' ', 'broadcast %m.broadcastType %s', 'send_broadcast1', 'digitalRead','0'],
+            [' ', 'broadcast %m.broadcastType2 %m.ports %s', 'send_broadcast2', 'analogWrite','0','0'],
+            [' ', 'broadcast %m.broadcastType0', 'send_broadcast0', 'take_picture'],
+            ['r', '%m.sensorvals value', 'get_sensorMsgs', 'digitalread'],
+ 
+ 
+        ],
+        menus: {
+            sensorvals: ['digitalread','analogread','moisture','light','sound','rotary','distance','temp','humidty','folder','camera'],
+            broadcastType: ['digitalRead','analogRead','digitalWriteHigh','moisture','light','sound','rotary','distance','button','relay','temp','humidty','folder','take_picture','speak','lcdcol','lcdtxt'],
+            broadcastType2: ['analogWrite','buzzer','led'],
+            broadcastType0: ['take_picture'],
+            ports: ['0','1','2','3','4','5','6','7']
+
+		}
+    };
+
+    // Register the extension
+    ScratchExtensions.register('GrovePi', descriptor, ext);
+})();