diff --git a/Multiprotocol/Bayang_nrf24l01.ino b/Multiprotocol/Bayang_nrf24l01.ino
index 87053b5..b485a66 100644
--- a/Multiprotocol/Bayang_nrf24l01.ino
+++ b/Multiprotocol/Bayang_nrf24l01.ino
@@ -265,11 +265,7 @@ uint16_t BAYANG_callback()
 #ifdef ENABLE_BAYANG_TELEMETRY
 		if(sub_protocol == BAYANG_TELEM)
 		{
-			Bayang_process();
-			// Return 0 here so that Bayang_process is called as often as possible
-			// to check for the incomming telemetry data. When telemetry is enabled
-			// the packet period is handled in the Bayang_process function.
-			return 0; 
+			return Bayang_process();
 		}
 		else
 #endif
@@ -317,6 +313,9 @@ uint16_t initBAYANG(void)
 
 #ifdef ENABLE_BAYANG_TELEMETRY
 	extern float    telemetry_voltage;
+extern uint16_t  telemetry_rx_recv_pps;
+extern uint16_t  telemetry_tx_recv_pps;
+extern uint16_t  telemetry_tx_sent_pps;
 	extern uint8_t  telemetry_rx_rssi;
 	extern uint8_t  telemetry_tx_rssi;
 	extern uint8_t  telemetry_datamode;
@@ -326,13 +325,21 @@ uint16_t initBAYANG(void)
 	extern uint16_t telemetry_flighttime;
 	extern uint8_t  telemetry_flightmode;
 
-	uint8_t telemetry_tx_rssi_count;
-	uint8_t telemetry_tx_rssi_next;
-
-
+	uint16_t telemetry_tx_sent_pkt_count;
+	uint32_t telemetry_tx_sent_pps_time;
+	uint16_t telemetry_tx_recv_pkt_count;
+	uint32_t telemetry_tx_recv_pps_time;
+	
+	
+	
+	
+	
+	
+	
+	static uint32_t bayang_tx_time = 0;
 	uint8_t BAYANG_recv_packet() {
 		uint8_t received = 0;
-		if (NRF24L01_ReadReg(NRF24L01_07_STATUS) & _BV(NRF24L01_07_RX_DR)) {
+		if (NRF24L01_Strobe(NRF24L01_FF_NOP) & _BV(NRF24L01_07_RX_DR)) {
 			int sum = 0;
 			uint16_t roll, pitch, yaw, throttle;
 
@@ -357,7 +364,13 @@ uint16_t initBAYANG(void)
 					v.bytes[1] = packet[2];
 					telemetry_voltage = v.v / 100.f;
 
-					telemetry_rx_rssi = packet[3];
+					telemetry_rx_recv_pps = packet[3]*2;
+					telemetry_rx_rssi = (uint8_t)(telemetry_rx_recv_pps*100/telemetry_tx_sent_pps);
+					if (telemetry_rx_rssi > 100)
+						telemetry_rx_rssi = 100;
+					telemetry_tx_rssi = (uint8_t)(telemetry_tx_recv_pps*100/telemetry_rx_recv_pps);
+					if (telemetry_tx_rssi > 100)
+						telemetry_tx_rssi = 100;
 					
 
 					v.bytes[0] = packet[4];
@@ -401,60 +414,83 @@ uint16_t initBAYANG(void)
 	BayangState Bayang_state = BAYANG_STATE_IDLE;
 	uint32_t Bayang_next_send = 0;
 
-	void Bayang_process() {
+	uint16_t Bayang_process() {
 		uint32_t time_micros = micros();
 		
+		uint16_t callback_period = 30; // asap
 		if (BAYANG_STATE_TRANSMITTING == Bayang_state) {
-			if (NRF24L01_ReadReg(NRF24L01_07_STATUS) & _BV(NRF24L01_07_TX_DS)) {
+			if (NRF24L01_Strobe(NRF24L01_FF_NOP) & _BV(NRF24L01_07_TX_DS) || time_micros - bayang_tx_time > 1100) {
 				// send finished, switch to rx to receive telemetry
 				XN297_Configure(_BV(NRF24L01_00_EN_CRC) | _BV(NRF24L01_00_CRCO) | _BV(NRF24L01_00_PWR_UP) | _BV(NRF24L01_00_PRIM_RX));
 				NRF24L01_WriteReg(NRF24L01_07_STATUS, 0x70);
-				NRF24L01_FlushTx();
 				NRF24L01_FlushRx();
 				
-				telemetry_tx_rssi_count++;
+			Bayang_state = BAYANG_STATE_RECEIEVING;
 				
-				Bayang_state = BAYANG_STATE_RECEIEVING;
+			callback_period = Bayang_next_send - time_micros - 550; // wait a while for quad to receive then send a packet
 			}
 		}
 		else if (BAYANG_STATE_RECEIEVING == Bayang_state) {
+		uint8_t change_state = 1;
 			// 250us is about the time it takes to read a packet over spi
-			if (time_micros > (Bayang_next_send-250)) {
-				// didnt receive telemetry in time
-				Bayang_state = BAYANG_STATE_IDLE;
-
+			if (time_micros > (Bayang_next_send-250))
+			{				
 				// if it's been a while since receiving telemetry data,
 				// stop sending the telemetry data to the transmitter
-				if (millis() - bayang_telemetry_last_rx > 1000)
+				if (time_micros - bayang_telemetry_last_rx > 1000000)
 					telemetry_lost = 1;
 			}
-			else if (BAYANG_recv_packet()) {
-				telemetry_tx_rssi_next++;
+		else if (BAYANG_recv_packet())
+		{
+			telemetry_tx_recv_pkt_count++;
 				// received telemetry packet
 				telemetry_lost = 0;
-				bayang_telemetry_last_rx = millis();
+			bayang_telemetry_last_rx = time_micros;
 			}
 			else
 			{
-				return;
+				change_state = 0;
 			}
 		
-			if (100 == telemetry_tx_rssi_count)
+			if (telemetry_tx_recv_pps_time < time_micros)
 			{
-				telemetry_tx_rssi = telemetry_tx_rssi_next;
-				telemetry_tx_rssi_next = 0;
-				telemetry_tx_rssi_count = 0;
+				telemetry_tx_recv_pps = telemetry_tx_recv_pps + telemetry_tx_recv_pkt_count - telemetry_tx_recv_pps/10;
+				telemetry_tx_recv_pkt_count = 0;
+				telemetry_tx_recv_pps_time += 100000;
 			}
 			
+			if (change_state)
+			{
 			Bayang_state = BAYANG_STATE_IDLE;
-			XN297_Configure(_BV(NRF24L01_00_EN_CRC) | _BV(NRF24L01_00_CRCO) | _BV(NRF24L01_00_PWR_UP));
-			NRF24L01_FlushRx();
+				XN297_Configure(_BV(NRF24L01_00_EN_CRC) | _BV(NRF24L01_00_CRCO) | _BV(NRF24L01_00_PWR_UP));
+				NRF24L01_WriteReg(NRF24L01_07_STATUS, 0x70);
+				NRF24L01_FlushRx();
+			}
 		}
-		else if (time_micros > Bayang_next_send) {
+		else if (time_micros > Bayang_next_send)
+		{
+			bayang_tx_time = time_micros;
+
 			BAYANG_send_packet(0);
 			Bayang_state = BAYANG_STATE_TRANSMITTING;
 			Bayang_next_send = time_micros + BAYANG_PACKET_PERIOD_TELEM;
+			callback_period = 600; // takes about 1ms to send(spi transfer + tx send)
+	
+			telemetry_tx_sent_pkt_count++;
+			if (telemetry_tx_sent_pps_time < time_micros)
+			{
+				telemetry_tx_sent_pps = telemetry_tx_sent_pps + telemetry_tx_sent_pkt_count - telemetry_tx_sent_pps/10;
+				telemetry_tx_sent_pkt_count = 0;
+				telemetry_tx_sent_pps_time += 100000;
+			}
+	
+			
 		}
+		else
+		{
+			callback_period = Bayang_next_send - time_micros;
+		}
+	return callback_period;
 	}
 #endif //ENABLE_BAYANG_TELEMETRY
 #endif
diff --git a/Multiprotocol/FlySky_a7105.ino b/Multiprotocol/FlySky_a7105.ino
index 4c76806..29c01aa 100644
--- a/Multiprotocol/FlySky_a7105.ino
+++ b/Multiprotocol/FlySky_a7105.ino
@@ -196,7 +196,9 @@ uint16_t initFlySky()
 
 	A7105_Init();
 	
-	if ((rx_tx_addr[3]&0xF0) > 0x90) // limit offset to 9 as higher values don't work with some RX (ie V912)
+	// limit offset to 9 as higher values don't work with some RX (ie V912)
+	// limit offset to 9 as CX20 repeats the same channels after that
+	if ((rx_tx_addr[3]&0xF0) > 0x90)
 		rx_tx_addr[3]=rx_tx_addr[3]-0x70;
 
 	// Build frequency hop table
@@ -213,11 +215,18 @@ uint16_t initFlySky()
 		if(i&0x01)
 			temp+=0x50;
 		if(sub_protocol==CX20)
-		{//Might need more dumps to be 100% sure but this is how it looks like to work
+		{
 			if(temp==0x0A)
 				temp+=0x37;
 			if(temp==0xA0)
-				temp-=0x73;
+			{
+				if (chanoffset<4)
+					temp=0x37;
+				else if (chanoffset<9)
+					temp=0x2D;
+				else
+					temp=0x29;
+			}
 		}
 		hopping_frequency[((chanrow&1)?15-i:i)]=temp-chanoffset;
 	}
diff --git a/Multiprotocol/Multiprotocol.ino b/Multiprotocol/Multiprotocol.ino
index 0823634..e8e4692 100644
--- a/Multiprotocol/Multiprotocol.ino
+++ b/Multiprotocol/Multiprotocol.ino
@@ -420,7 +420,10 @@ void loop()
 		{
 			TX_MAIN_PAUSE_on;
 			tx_pause();
-			next_callback=remote_callback();
+			if(IS_INPUT_SIGNAL_on)
+				next_callback=remote_callback();
+			else
+				next_callback=2000;					// No PPM/serial signal check again in 2ms...
 			TX_MAIN_PAUSE_off;
 			tx_resume();
 			while(next_callback>4000)
@@ -536,8 +539,8 @@ static void update_channels_aux(void)
 static void update_led_status(void)
 {
 	if(IS_INPUT_SIGNAL_on)
-		if(millis()-last_signal>50)
-			INPUT_SIGNAL_off;						//no valid signal (PPM or Serial) received for 50ms
+		if(millis()-last_signal>70)
+			INPUT_SIGNAL_off;							//no valid signal (PPM or Serial) received for 70ms
 	if(blink<millis())
 	{
 		if(IS_INPUT_SIGNAL_off)
diff --git a/Multiprotocol/NRF24l01_SPI.ino b/Multiprotocol/NRF24l01_SPI.ino
index 37faed1..c844e9d 100644
--- a/Multiprotocol/NRF24l01_SPI.ino
+++ b/Multiprotocol/NRF24l01_SPI.ino
@@ -101,11 +101,13 @@ static uint8_t NRF24L01_GetDynamicPayloadSize(void)
 	return res;
 }
 
-static void  NRF24L01_Strobe(uint8_t state)
+static uint8_t NRF24L01_Strobe(uint8_t state)
 {
+	uint8_t result;
 	NRF_CSN_off;
-	SPI_Write(state);
+	result =SPI_Write(state);
 	NRF_CSN_on;
+	return result;
 }
 
 void NRF24L01_FlushTx()
@@ -389,9 +391,17 @@ void XN297_ReadPayload(uint8_t* msg, uint8_t len)
 	NRF24L01_ReadPayload(msg, len);
 	for(uint8_t i=0; i<len; i++)
 	{
-		msg[i] = bit_reverse(msg[i]);
-		if(xn297_scramble_enabled)
-			msg[i] ^= bit_reverse(xn297_scramble[i+xn297_addr_len]);
+		if (protocol == MODE_BAYANG) {
+			if(xn297_scramble_enabled)
+				msg[i] = bit_reverse(msg[i] ^ xn297_scramble[i+xn297_addr_len]);
+			else
+				msg[i] = bit_reverse(msg[i]);
+		}
+		else {
+			msg[i] = bit_reverse(msg[i]);
+			if(xn297_scramble_enabled)
+				msg[i] ^= bit_reverse(xn297_scramble[i+xn297_addr_len]);
+		}
 	}
 }
 
diff --git a/Multiprotocol/Telemetry.ino b/Multiprotocol/Telemetry.ino
index 295bb73..b37007c 100644
--- a/Multiprotocol/Telemetry.ino
+++ b/Multiprotocol/Telemetry.ino
@@ -21,7 +21,10 @@
 	float    telemetry_voltage      = 0.f;
 	uint8_t  telemetry_rx_rssi      = 100;
 	#ifdef ENABLE_BAYANG_TELEMETRY
+		uint16_t telemetry_rx_recv_pps  = 100;
 		uint8_t  telemetry_tx_rssi      = 100;
+		uint16_t telemetry_tx_recv_pps  = 100;
+		uint16_t telemetry_tx_sent_pps  = 100;
 		uint8_t  telemetry_datamode     = 0;
 		uint8_t  telemetry_dataitem     = 0;
 		float    telemetry_data[3]      = {0};
@@ -51,7 +54,7 @@ uint8_t frame[18];
 
 #ifdef BASH_SERIAL
 // For bit-bashed serial output
-	struct t_serial_bash
+	volatile struct t_serial_bash
 	{
 		uint8_t head ;
 		uint8_t tail ;
@@ -71,12 +74,12 @@ void DSM_frame()
 #endif
 
 #if defined AFHDS2A_TELEMETRY
-void AFHDSA_short_frame()
-{
-	Serial_write(0xAA);					// Telemetry packet
-	for (uint8_t i = 0; i < 29; i++)	// RSSI value followed by 4*7 bytes of telemetry data
-		Serial_write(pkt[i]);
-}
+	void AFHDSA_short_frame()
+	{
+		Serial_write(0xAA);					// Telemetry packet
+		for (uint8_t i = 0; i < 29; i++)	// RSSI value followed by 4*7 bytes of telemetry data
+			Serial_write(pkt[i]);
+	}
 #endif
 
 void frskySendStuffed()
@@ -371,10 +374,7 @@ void sportSendFrame()
 				case 2: //BATT
 					frame[2] = 0x04;
 					frame[3] = 0xf1;
-					if (protocol == MODE_BAYANG)
-						frame[4] = telemetry_voltage/4.f * 255.f/3.3f;//a1;
-					else
-						frame[4] = telemetry_voltage;
+					frame[4] = telemetry_voltage/4.f * 255.f/3.3f;//a1;
 					break;
 				case 3: //FCS VOLTAGE
 					frame[2] = 0x10;
@@ -447,12 +447,14 @@ void sportSendFrame()
 				case 12: // xjt t1
 					frame[2] = 0x02;
 					frame[3] = 0x00;
-					frame[4] = 0;
+					frame[4] = telemetry_tx_sent_pps >> 1; // divided by 2
+					frame[5] = telemetry_rx_recv_pps >> 1; // divided by 2
 					break;								
 				case 13: // xjt t2
 					frame[2] = 0x05;
 					frame[3] = 0x00;
-					frame[4] = 0;
+					frame[4] = telemetry_tx_recv_pps >> 1; // divided by 2
+					frame[5] = 0;
 					break;
 				default:
 					if(sport)
@@ -963,7 +965,7 @@ ISR(TIMER0_COMPB_vect)
 		else
 		{
 			// prepare next byte and allow for 2 stop bits
-			struct t_serial_bash *ptr = &SerialControl ;
+			volatile struct t_serial_bash *ptr = &SerialControl ;
 			if ( ptr->head != ptr->tail )
 			{
 				GPIOR0 = ptr->data[ptr->tail] ;
@@ -1014,7 +1016,7 @@ ISR(TIMER0_OVF_vect)
 	if ( --GPIOR1 == 0 )
 	{
 		// prepare next byte
-		struct t_serial_bash *ptr = &SerialControl ;
+		volatile struct t_serial_bash *ptr = &SerialControl ;
 		if ( ptr->head != ptr->tail )
 		{
 			GPIOR0 = ptr->data[ptr->tail] ;
diff --git a/Multiprotocol/_Config.h b/Multiprotocol/_Config.h
index 0ecc831..bc16d7d 100644
--- a/Multiprotocol/_Config.h
+++ b/Multiprotocol/_Config.h
@@ -151,6 +151,7 @@
 //In this section you can configure the NUNCHUCK.
 //If you do not plan to use the NUNCHUCK mode comment this line using "//" to save Flash space, you don't need to configure anything below in this case
 #define ENABLE_NUNCHUCK
+//	pont diviseur		VCC --------------- 240K ------------- analogRead(0) -------------- 75K ----------- GND
 #define VBAT_PIN 3 // for Tx adapters with battery
 #define VBAT_VAL 340 // for Tx adapters with battery (attention pont divisieur pour avoir 1,1V max ,~=3,404V)
 #define VBAT_LIM 330 // for Tx adapters with battery (attention pont divisieur pour avoir 1,1V max , ~=3,302V)
diff --git a/Multiprotocol/sync.ffs_db b/Multiprotocol/sync.ffs_db
index bfdd61b..30f54e3 100644
Binary files a/Multiprotocol/sync.ffs_db and b/Multiprotocol/sync.ffs_db differ