add Char readFloat() and writeFloat()

Author: hathach

libraries/Bluefruit52Lib/src/BLECharacteristic.cpp

@@ -609,6 +609,11 @@ uint16_t BLECharacteristic::write32(int num)
   return write32( (uint32_t) num );
 }
 
+uint16_t BLECharacteristic::writeFloat(float num)
+{
+  return write( (uint8_t*) &num, sizeof(num) );
+}
+
 /*------------------------------------------------------------------*/
 /* READ
  *------------------------------------------------------------------*/
@@ -652,6 +657,12 @@ uint32_t BLECharacteristic::read32(void)
   return read(&num, sizeof(num)) ? num : 0;
 }
 
+float BLECharacteristic::readFloat(void)
+{
+  float num;
+  return read(&num, sizeof(num)) ? num : 0;
+}
+
 uint16_t BLECharacteristic::getCccd(uint16_t conn_hdl)
 {
   VERIFY( Bluefruit.connected(conn_hdl) && (_handles.cccd_handle != BLE_GATT_HANDLE_INVALID), 0 );

libraries/Bluefruit52Lib/src/BLECharacteristic.h

@@ -121,17 +121,19 @@ class BLECharacteristic
     uint16_t write   (const void* data, uint16_t len);
     uint16_t write   (const char* str);
 
-    uint16_t write8  (uint8_t  num);
-    uint16_t write16 (uint16_t num);
-    uint16_t write32 (uint32_t num);
-    uint16_t write32 (int      num);
+    uint16_t write8     (uint8_t  num);
+    uint16_t write16    (uint16_t num);
+    uint16_t write32    (uint32_t num);
+    uint16_t write32    (int      num);
+    uint16_t writeFloat (float    num);
 
     /*------------- Read -------------*/
     uint16_t read  (void* buffer, uint16_t bufsize, uint16_t offset = 0);
 
-    uint8_t  read8 (void);
-    uint16_t read16(void);
-    uint32_t read32(void);
+    uint8_t  read8     (void);
+    uint16_t read16    (void);
+    uint32_t read32    (void);
+    float    readFloat (void);
 
     uint16_t getCccd(uint16_t conn_hdl);