diff --git a/Multiprotocol/A7105_SPI.ino b/Multiprotocol/A7105_SPI.ino
index e3b59d1..1698725 100644
--- a/Multiprotocol/A7105_SPI.ino
+++ b/Multiprotocol/A7105_SPI.ino
@@ -196,19 +196,8 @@ const uint8_t PROGMEM FLYSKY_A7105_regs[] = {
 	0x13, 0xc3, 0x00, 0xff, 0x00, 0x00, 0x3b, 0x00, 0x17, 0x47, 0x80, 0x03, 0x01, 0x45, 0x18, 0x00,
 	0x01, 0x0f, 0xff
 };
-
 #define ID_NORMAL 0x55201041
 #define ID_PLUS   0xAA201041
-
-/*
-static const uint8_t a7105Regs[] = {
-	-1,  0x42, 0x00, 0x14, 0x00,  -1 ,  -1 , 0x00, 0x00, 0x00, 0x00, 0x01, 0x21, 0x05, 0x00, 0x50,
-	0x9e, 0x4b, 0x00, 0x02, 0x16, 0x2b, 0x12, 0x00, 0x62, 0x80, 0x80, 0x00, 0x0a, 0x32, 0xc3, 0x0f,
-	0x13, 0xc3, 0x00,  -1,  0x00, 0x00, 0x3b, 0x00, 0x17, 0x47, 0x80, 0x03, 0x01, 0x45, 0x18, 0x00,
-	0x01, 0x0f,  -1,
-};
-*/
-
 void A7105_Init(uint8_t protocol)
 {
 	void *A7105_Regs;
diff --git a/Multiprotocol/Hubsan_a7105.ino b/Multiprotocol/Hubsan_a7105.ino
index d13bdb7..760cb4e 100644
--- a/Multiprotocol/Hubsan_a7105.ino
+++ b/Multiprotocol/Hubsan_a7105.ino
@@ -181,14 +181,15 @@ static void __attribute__((unused)) hubsan_build_packet()
 }
 
 #if defined(TELEMETRY)
-/*static uint8_t hubsan_check_integrity() 
+static uint8_t __attribute__((unused)) hubsan_check_integrity() 
 {
-    int sum = 0;
+    if( (packet[0]&0xFE) != 0xE0 )
+		return 0;
+	uint8_t sum = 0;
     for(uint8_t i = 0; i < 15; i++)
         sum += packet[i];
-    return packet[15] == ((256 - (sum % 256)) & 0xFF);
+	return ( packet[15] == (uint8_t)(-sum) );
 }
-*/
 #endif
 
 uint16_t ReadHubsan() 
@@ -295,7 +296,8 @@ uint16_t ReadHubsan()
 			}
 			else {
 #if defined(TELEMETRY)
-				if( rfMode == A7105_TX) {// switch to rx mode 3ms after packet sent
+				if( rfMode == A7105_TX)
+				{// switch to rx mode 3ms after packet sent
 					for( i=0; i<10; i++)
 					{
 						if( !(A7105_ReadReg(A7105_00_MODE) & 0x01)) {// wait for tx completion
@@ -306,15 +308,23 @@ uint16_t ReadHubsan()
 						}
 					}
 				}
-				if( rfMode == A7105_RX) { // check for telemetry frame
-					for( i=0; i<10; i++) {
-						if( !(A7105_ReadReg(A7105_00_MODE) & 0x01)) { // data received
+				if( rfMode == A7105_RX)
+				{ // check for telemetry frame
+					for( i=0; i<10; i++)
+					{
+						if( !(A7105_ReadReg(A7105_00_MODE) & 0x01))
+						{ // data received
 							A7105_ReadData();
-							if( !(A7105_ReadReg(A7105_00_MODE) & 0x01)){ // data received
-								v_lipo=packet[13];// hubsan lipo voltage 8bits the real value is h_lipo/10(0x2A=42-4.2V)
+							if( hubsan_check_integrity() )
+							{
+								v_lipo=packet[13];// hubsan lipo voltage 8bits the real value is h_lipo/10(0x2A=42 -> 4.2V)
 								telemetry_link=1;
 							}	
 							A7105_Strobe(A7105_RX);
+							// Read TX RSSI
+							RSSI_dBm=256-(A7105_ReadReg(A7105_1D_RSSI_THOLD)*8)/5;		// value from A7105 is between 8 for maximum signal strength to 160 or less
+							if(RSSI_dBm<0) RSSI_dBm=0;
+							else if(RSSI_dBm>255) RSSI_dBm=255;
 							break;
 						}
 					}
@@ -344,7 +354,6 @@ uint16_t initHubsan() {
 	packet_count=0;
 	id_data=ID_NORMAL;
 #if defined(TELEMETRY)
-	v_lipo=0;
 	telemetry_link=0;
 #endif
 	return 10000;
diff --git a/Multiprotocol/Multiprotocol.ino b/Multiprotocol/Multiprotocol.ino
index 469fbdd..d9a8430 100644
--- a/Multiprotocol/Multiprotocol.ino
+++ b/Multiprotocol/Multiprotocol.ino
@@ -100,7 +100,6 @@ uint8_t pktt[MAX_PKT];//telemetry receiving packets
 	int16_t RSSI_dBm;
 	//const uint8_t RSSI_offset=72;//69 71.72 values db
 	uint8_t telemetry_link=0; 
-	#include "telemetry.h"
 #endif 
 
 // Callback
@@ -623,11 +622,11 @@ uint16_t limit_channel_100(uint8_t ch)
 #if defined(TELEMETRY)
 void Serial_write(uint8_t data)
 {
-	uint8_t t=tx_head;
-	if(++t>=TXBUFFER_SIZE)
-		t=0;
-	tx_buff[t]=data;
-	tx_head=t;
+	cli();	// disable global int
+	if(++tx_head>=TXBUFFER_SIZE)
+		tx_head=0;
+	tx_buff[tx_head]=data;
+	sei();	// enable global int
 	UCSR0B |= (1<<UDRIE0);//enable UDRE interrupt
 }
 #endif
@@ -647,6 +646,7 @@ static void Mprotocol_serial_init()
 	UCSR0B |= (1<<TXEN0);//tx enable
 }
 
+#if defined(TELEMETRY)
 static void PPM_Telemetry_serial_init()
 {
 	//9600 bauds
@@ -656,6 +656,7 @@ static void PPM_Telemetry_serial_init()
 	UCSR0C |= (1<<UCSZ01)|(1<<UCSZ00);
 	UCSR0B |= (1<<TXEN0);//tx enable
 }
+#endif
 
 // Convert 32b id to rx_tx_addr
 static void set_rx_tx_addr(uint32_t id)
diff --git a/Multiprotocol/telemetry.h b/Multiprotocol/Telemetry.ino
similarity index 86%
rename from Multiprotocol/telemetry.h
rename to Multiprotocol/Telemetry.ino
index f6fe07d..48f8f2c 100644
--- a/Multiprotocol/telemetry.h
+++ b/Multiprotocol/Telemetry.ino
@@ -22,7 +22,7 @@ void frskySendStuffed()
 		if ((frame[i] == 0x7e) || (frame[i] == 0x7d))
 		{
 			Serial_write(0x7D);	    	  
-			frame[i] ^= 0x20;			
+			frame[i] ^= 0x20;	
 		}
 		Serial_write(frame[i]);
 	}
@@ -39,25 +39,24 @@ void compute_RSSIdbm(){
 
 void frsky_link_frame()
 {
-	frame[0] = 0xfe;
+	frame[0] = 0xFE;
 	if ((cur_protocol[0]&0x1F)==MODE_FRSKY)
 	{		
-				compute_RSSIdbm();
-				frame[1] = pktt[3];
-				frame[2] = pktt[4];
-				frame[3] = (uint8_t)RSSI_dBm; 
+		compute_RSSIdbm();				
+		frame[1] = pktt[3];
+		frame[2] = pktt[4];
+		frame[3] = (uint8_t)RSSI_dBm; 
 		frame[4] = pktt[5]*2;
-				frame[5] = frame[6] = frame[7] = frame[8] = 0;
-			}
+	}
 	else
 		if ((cur_protocol[0]&0x1F)==MODE_HUBSAN)
 		{	
 			frame[1] = v_lipo*2; //v_lipo; common 0x2A=42/10=4.2V
 			frame[2] = frame[1];			
-			frame[3] =0X6e;
-			frame[4] =2*0x6e;				
-				frame[5] = frame[6] = frame[7] = frame[8] = 0;
-			}	
+			frame[3] = 0x00;
+			frame[4] = (uint8_t)RSSI_dBm;
+		}
+	frame[5] = frame[6] = frame[7] = frame[8] = 0;			
 	frskySendStuffed();
 }
 
@@ -129,7 +128,7 @@ void frsky_user_frame()
 	}
 	else
 		pass=0;
-}
+}	   
 #endif
 
 void frskyUpdate()
@@ -141,9 +140,9 @@ void frskyUpdate()
 		return;
 	}
 	#if defined HUB_TELEMETRY
-	if(!telemetry_link)
+	if(!telemetry_link && (cur_protocol[0]&0x1F) != MODE_HUBSAN )
 		frsky_user_frame();
 	#endif
 }
 
-#endif
+#endif
\ No newline at end of file
diff --git a/Multiprotocol/multi.lua b/Multiprotocol/multi.lua
index 4b18f5e..07721ae 100644
--- a/Multiprotocol/multi.lua
+++ b/Multiprotocol/multi.lua
@@ -44,7 +44,7 @@ local function run_func(proto, sw)
 	
 	-- delais init
 	if proto ~= debut then
-		tps = getTime() + 500 	-- delai pour mini 12 cycle PPM
+		tps = getTime() + 250 	-- delai pour mini 12 cycle PPM
 		tpsact = 1024
 		debut = proto
 	end
@@ -54,7 +54,7 @@ local function run_func(proto, sw)
 	local dir = 0
 	local pro = 0
 	
-	if tpsact == 0 and sw < 200 then
+	if tpsact == 0 and sw < 100 then
 		-- reprise valeur input
 		pro = getValue(1)
 		ail = getValue(2)
@@ -82,7 +82,10 @@ local function run_func(proto, sw)
 		if proto % 3 == 1 then dir = -1024 end
 		if proto % 3 == 0 then dir = 1024 end
 		
-		if tps < getTime() then tpsact = 0 end
+		if tps < getTime() then
+			tpsact = tpsact - 512
+			if tpsact>-20 then tps = getTime() + 250 end
+		end
 		sw = tpsact
 	end
 	
diff --git a/Multiprotocol/multiprotocol.h b/Multiprotocol/multiprotocol.h
index ab72a2f..793645e 100644
--- a/Multiprotocol/multiprotocol.h
+++ b/Multiprotocol/multiprotocol.h
@@ -13,6 +13,14 @@
  along with Multiprotocol.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+// Check selected board type
+#ifndef ARDUINO_AVR_PRO
+	#error You must select the board type "Arduino Pro or Pro Mini"
+#endif
+#if F_CPU != 16000000L || not defined(__AVR_ATmega328P__)
+	#error You must select the processor type "ATmega328(5V, 16MHz)"
+#endif
+
 //******************
 // Protocols
 //******************
diff --git a/sync.ffs_db b/sync.ffs_db
index 59c8138..f8a7ae0 100644
Binary files a/sync.ffs_db and b/sync.ffs_db differ
diff --git a/telemetryFRSKY.fzz b/telemetryFRSKY.fzz
index 7f3aed1..0a6f49a 100644
Binary files a/telemetryFRSKY.fzz and b/telemetryFRSKY.fzz differ
diff --git a/telemetryFRSKY.jpg b/telemetryFRSKY.jpg
index 2ce22d2..5876793 100644
Binary files a/telemetryFRSKY.jpg and b/telemetryFRSKY.jpg differ