Bumped to version 0.2.1

README.md

@@ -4,6 +4,16 @@ An Android Things libray to control RFID readers based on the RC522 reader.
 
 Based on [pi-rc522](https://github.com/ondryaso/pi-rc522) by user **ondryaso**
 
+### Features
+* Detect MIFARE 1k tags (not tested in other tags)
+* Authenticate, read and write to tags
+* Change authentication keys and access bits (must be done manually)
+
+### Planned features
+* Increment, decrement, transfer and restore for value blocks
+* Easier way of changing keys and access bits
+* Helper functions
+
 ## Connections
 The connections vary based on the [board](https://developer.android.com/things/hardware/developer-kits.html) used.
 
@@ -15,7 +25,7 @@ This library is available at jCenter. To install add this to your module's build
 
 
 dependencies {
-    compile 'com.galarzaa.android-things:rc522:0.2.0'
+    compile 'com.galarzaa.android-things:rc522:0.2.1'
 }
 ```
 
@@ -33,6 +43,7 @@ the RST pin.
 
 ### Polling state
 ```java
+import com.galarzaa.androidthings.Rc522;
 public class MainActivty extends AppCompatActivity{
     private Rc522 mRc522;
     @Override
@@ -51,20 +62,55 @@ public class MainActivty extends AppCompatActivity{
 
     private void readRFid(){
         while(true){
-            boolean success = rc522.request();
-            if(success){
-                success = rc522.antiCollisionDetect();
-                if(success){
-                    byte[] uuid = rc522.getUid();
-                    /* Perform any operations here */
-                    break;
-                }
+            boolean success = mRc522.request();
+            if(!success){
+                continue;
             }
+            success = mRc522.antiCollisionDetect();
+            if(!success){
+                continue;
+            }
+            byte[] uid = mRc522.getUid();
+            mRc522.selectTag(uid);
+            break;
+        }
+        // Factory Key A:
+        byte[] key = {(byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF};
+        // Data that will be written
+        byte[] newData = {0x0F,0x0E,0x0D,0x0C,0x0B,0x0A,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x01,0x00};
+        // Get the address of the desired block
+        byte block = Rc522.getBlockAddress(3, 2);
+        //We need to authenticate the card, each sector can have a different key
+        boolean result = rc522.authenticateCard(Rc522.AUTH_A, block, key);
+        if (!result) {
+            //Authentication failed
+            return;
         }
+        result = rc522.writeBlock(block, newData);
+        if(!result){
+            //Could not write, key might have permission to read but not write
+            return;
+        }
+        //Buffer to hold read data
+        byte[] buffer = new byte[16];
+        //Since we're still using the same block, we don't need to authenticate again
+        result = rc522.readBlock(block, buffer);
+        if(!result){
+            //Could not read card
+            return;
+        }
+        //Stop crypto to allow subsequent readings
+        rc522.stopCrypto();
+
+
     }
 }
 ```
 
 ## Contributing
 This library is still in development, suggestions, improvements and fixes are welcome. Please 
 submit a **pull request**
+
+## Resources
+* [MFRC522 product data sheet, pdf, 95 pages](http://www.nxp.com/docs/en/data-sheet/MFRC522.pdf)
+* [MIFARE Classic EV1 1K tags data product data sheet, pdf, 20 pages](http://www.nxp.com/docs/en/data-sheet/MFRC522.pdf)

dependencies.gradle

@@ -2,8 +2,8 @@ ext.versions = [
         minSdk: 24,
         compileSdk: 25,
         buildTools: '25.0.3',
-        publishVersion: '0.2.0',
-        publishVersionCode: 4,
+        publishVersion: '0.2.1',
+        publishVersionCode: 5,
         gradleVersion: '2.3.3',
 
         thingsLib: '0.2-devpreview'