- gatttool read

lib/linux/bindings.js

@@ -62,6 +62,7 @@ nobleBindings.connect = function(peripheralUuid) {
   this._gatttool[address].on('disconnect', this.onDisconnect.bind(this));
   this._gatttool[address].on('servicesDiscover', this.onServicesDiscovered.bind(this));
   this._gatttool[address].on('characteristicsDiscover', this.onCharacteristicsDiscovered.bind(this));
+  this._gatttool[address].on('read', this.onRead.bind(this));
 
   this._gatttool[address].connect();
 };
@@ -124,7 +125,15 @@ nobleBindings.onCharacteristicsDiscovered = function(address, serviceUuid, chara
 };
 
 nobleBindings.read = function(peripheralUuid, serviceUuid, characteristicUuid) {
+  var address = this._addresses[peripheralUuid];
+
+  this._gatttool[address].read(serviceUuid, characteristicUuid);
+};
+
+nobleBindings.onRead = function(address, serviceUuid, characteristicUuid, data) {
+  var uuid = address.split(':').join('').toLowerCase();
 
+  this.emit('read', uuid, serviceUuid, characteristicUuid, data, false);
 };
 
 nobleBindings.write = function(peripheralUuid, serviceUuid, characteristicUuid, data, notify) {

lib/linux/gatttool.js

@@ -81,6 +81,8 @@ Gatttool.prototype.executeCommand = function(command, callback) {
 };
 
 Gatttool.prototype.connect = function() {
+  // TODO: handle 'public' and 'random'
+
   this.executeCommand('connect', function(output) {
     // console.log('connect output: ' + JSON.stringify(output));
   }.bind(this));
@@ -210,4 +212,26 @@ Gatttool.prototype.discoverCharacteristics = function(serviceUuid) {
   }.bind(this));
 };
 
+Gatttool.prototype.read = function(serviceUuid, characteristicUuid) {
+  var characteristic = this._characteristics[serviceUuid][characteristicUuid];
+
+  this.executeCommand('char-read-hnd ' + characteristic.valueHandle, function(output) {
+    console.log('read output: ' + JSON.stringify(output));
+
+     for (var i in output) {
+      var line = output[i].trim();
+
+      if(found = line.match(/^Characteristic value\/descriptor: (.*)$/)) {
+        var bytes = found[1].trim().split(' ');
+
+        for (var i in bytes) {
+          bytes[i] = parseInt(bytes[i], 16);
+        }
+
+        this.emit('read', this._address, serviceUuid, characteristicUuid, new Buffer(bytes));
+      }
+    }
+  }.bind(this));
+};
+
 module.exports = Gatttool;

test.js

@@ -102,11 +102,11 @@ noble.on('discover', function(peripheral) {
       });
 
 
-      //characteristics[characteristicIndex].read();
+      characteristics[characteristicIndex].read();
       //characteristics[characteristicIndex].write(new Buffer('hello'));
       //characteristics[characteristicIndex].broadcast(true);
       //characteristics[characteristicIndex].notify(true);
-      characteristics[characteristicIndex].discoverDescriptors();
+      // characteristics[characteristicIndex].discoverDescriptors();
     });