diff --git a/Multiprotocol/A7105_SPI.ino b/Multiprotocol/A7105_SPI.ino
index 56d31f8..00d08c0 100644
--- a/Multiprotocol/A7105_SPI.ino
+++ b/Multiprotocol/A7105_SPI.ino
@@ -217,6 +217,14 @@ void A7105_Init(void)
 	for (uint8_t i = 0; i < 0x32; i++)
 	{
 		uint8_t val=pgm_read_byte_near(&A7105_Regs[i]);
+		#ifdef FLYSKY_A7105_INO
+			if(protocol==MODE_FLYSKY && sub_protocol==CX20)
+			{
+				if(i==0x0E) val=0x01
+				if(i==0x1F) val=0x1F
+				if(i==0x20) val=0x1E
+			}
+		#endif
 		if( val != 0xFF)
 			A7105_WriteReg(i, val);
 	}
diff --git a/Multiprotocol/FlySky_a7105.ino b/Multiprotocol/FlySky_a7105.ino
index c1632e7..538f019 100644
--- a/Multiprotocol/FlySky_a7105.ino
+++ b/Multiprotocol/FlySky_a7105.ino
@@ -55,7 +55,6 @@ const uint8_t PROGMEM V912_X17_SEQ[10] =  { 0x14, 0x31, 0x40, 0x49, 0x49,    //
 
 static void __attribute__((unused)) flysky_apply_extension_flags()
 {
-	static uint8_t seq_counter;
 	switch(sub_protocol)
 	{
 		case V9X9:
@@ -100,9 +99,9 @@ static void __attribute__((unused)) flysky_apply_extension_flags()
 			break;
 			
 		case V912:
-			seq_counter++;
-			if( seq_counter > 9)
-				seq_counter = 0;
+			packet_count++;
+			if( packet_count > 9)
+				packet_count = 0;
 			packet[12] |= 0x20; // bit 6 is always set ?
 			packet[13] = 0x00;  // unknown
 			packet[14] = 0x00;
@@ -112,8 +111,8 @@ static void __attribute__((unused)) flysky_apply_extension_flags()
 				packet[14] |= FLAG_V912_TOPBTN;
 			packet[15] = 0x27; // [15] and [16] apparently hold an analog channel with a value lower than 1000
 			packet[16] = 0x03; // maybe it's there for a pitch channel for a CP copter ?
-			packet[17] = pgm_read_byte( &V912_X17_SEQ[seq_counter] ) ; // not sure what [17] & [18] are for
-			if(seq_counter == 0)                    // V912 Rx does not even read those bytes... [17-20]
+			packet[17] = pgm_read_byte( &V912_X17_SEQ[packet_count] ) ; // not sure what [17] & [18] are for
+			if(packet_count == 0)                    // V912 Rx does not even read those bytes... [17-20]
 				packet[18] = 0x02;
 			else
 				packet[18] = 0x00;
@@ -121,6 +120,11 @@ static void __attribute__((unused)) flysky_apply_extension_flags()
 			packet[20] = 0x00; // unknown
 			break;
 			
+		case CX20:
+			packet_count++;
+			packet[19] = 0x00; // unknown
+			packet[20] = (packet_count<<4)|0x0A;
+			break;
 		default:
 			break; 
 	}
@@ -164,7 +168,11 @@ uint16_t ReadFlySky()
         hopping_frequency_no = (hopping_frequency_no + 1) & 0x0F;
 		A7105_SetPower();
     }
-	return 1510;	//1460 on deviation but not working with the latest V911 bricks... Turnigy 9X v2 is 1533, Flysky TX for 9XR/9XR Pro is 1510, V911 TX is 1490.
+
+	if(sub_protocol=CX20)
+		return 3984;
+	else
+		return 1510;	//1460 on deviation but not working with the latest V911 bricks... Turnigy 9X v2 is 1533, Flysky TX for 9XR/9XR Pro is 1510, V911 TX is 1490.
 }
 
 const uint8_t PROGMEM tx_channels[8][4] = {
@@ -205,7 +213,12 @@ uint16_t initFlySky()
 		hopping_frequency[((chanrow&1)?15-i:i)]=temp-chanoffset;
 	}
 	hopping_frequency_no=0;
-	
+	if(sub_protocol==CX20)
+	{//Haven't figured yet the relation between TX ID and Frequencies
+		memcpy(rx_tx_addr,"\x06\x35\x89\x72",4);
+		memcpy(hopping_frequency,"\x35\x85\x21\x71\x2B\x7B\x3A\x53\x49\x26\x0D\x5D\x3F\x8F\x17\x6",16);
+	}
+	packet_count=0;
 	if(IS_AUTOBIND_FLAG_on)
 		bind_counter = FLYSKY_BIND_COUNT;
 	else
diff --git a/Multiprotocol/Multiprotocol.h b/Multiprotocol/Multiprotocol.h
index 0b10aae..3c0ff9a 100644
--- a/Multiprotocol/Multiprotocol.h
+++ b/Multiprotocol/Multiprotocol.h
@@ -55,7 +55,8 @@ enum Flysky
 	Flysky	= 0,
 	V9X9	= 1,
 	V6X6	= 2,
-	V912	= 3
+	V912	= 3,
+	CX20	= 4
 };
 enum AFHDS2A
 {
@@ -240,14 +241,14 @@ struct PPM_Parameters
 //***  AUX flags  ***
 //*******************
 #define GET_FLAG(ch, mask) ( ch ? mask : 0)
-#define Servo_AUX1	Servo_AUX & _BV(0)
-#define Servo_AUX2	Servo_AUX & _BV(1)
-#define Servo_AUX3	Servo_AUX & _BV(2)
-#define Servo_AUX4	Servo_AUX & _BV(3)
-#define Servo_AUX5	Servo_AUX & _BV(4)
-#define Servo_AUX6	Servo_AUX & _BV(5)
-#define Servo_AUX7	Servo_AUX & _BV(6)
-#define Servo_AUX8	Servo_AUX & _BV(7)
+#define Servo_AUX1	(Servo_AUX & _BV(0))
+#define Servo_AUX2	(Servo_AUX & _BV(1))
+#define Servo_AUX3	(Servo_AUX & _BV(2))
+#define Servo_AUX4	(Servo_AUX & _BV(3))
+#define Servo_AUX5	(Servo_AUX & _BV(4))
+#define Servo_AUX6	(Servo_AUX & _BV(5))
+#define Servo_AUX7	(Servo_AUX & _BV(6))
+#define Servo_AUX8	(Servo_AUX & _BV(7))
 
 //************************
 //***  Power settings  ***
@@ -415,6 +416,7 @@ Serial: 100000 Baud 8e2      _ xxxx xxxx p --
 			V9x9		1
 			V6x6		2
 			V912		3
+			CX20		4
 		sub_protocol==Hisky
 			Hisky		0
 			HK310		1
diff --git a/Multiprotocol/_Config.h b/Multiprotocol/_Config.h
index 4a1d950..e5d27bc 100644
--- a/Multiprotocol/_Config.h
+++ b/Multiprotocol/_Config.h
@@ -178,6 +178,7 @@ const PPM_Parameters PPM_prot[15]=	{
 		V9X9
 		V6X6
 		V912
+		CX20
 	MODE_HUBSAN
 		NONE
 	MODE_FRSKYD