diff --git a/Multiprotocol/FrSkyR9_sx1276.ino b/Multiprotocol/FrSkyR9_sx1276.ino
index 177ff90..10512ca 100644
--- a/Multiprotocol/FrSkyR9_sx1276.ino
+++ b/Multiprotocol/FrSkyR9_sx1276.ino
@@ -5,7 +5,7 @@
 
 // TODO the channel spacing is equal, consider calculating the new channel instead of using lookup tables (first_chan + index * step)
 
-static uint32_t _freq_map_915[FREQ_MAP_SIZE] =
+static uint32_t FrSkyR9_freq_map_915[FREQ_MAP_SIZE] =
 {
 	914472960,
 	914972672,
@@ -35,12 +35,12 @@ static uint32_t _freq_map_915[FREQ_MAP_SIZE] =
 	926965760,
 	927465472,
 
-	// last two determined by _step
+	// last two determined by FrSkyR9_step
 	0,
 	0
 };
 
-static uint32_t _freq_map_868[FREQ_MAP_SIZE] =
+static uint32_t FrSkyR9_freq_map_868[FREQ_MAP_SIZE] =
 {
 	859504640,
 	860004352,
@@ -70,26 +70,26 @@ static uint32_t _freq_map_868[FREQ_MAP_SIZE] =
 	871997440,
 	872497152,
 
-	// last two determined by _step
+	// last two determined by FrSkyR9_step
 	0,
 	0
 };
 
-static uint8_t _step = 1;
-static uint32_t* _freq_map = _freq_map_915;
+static uint8_t FrSkyR9_step = 1;
+static uint32_t* FrSkyR9_freq_map = FrSkyR9_freq_map_915;
 
 uint16_t initFrSkyR9()
 {
 	set_rx_tx_addr(MProtocol_id_master);
 
-	if(sub_protocol == 0) // 915MHz
-		_freq_map = _freq_map_915;
-	else if(sub_protocol == 1) // 868MHz
-		_freq_map = _freq_map_868;
+	if(sub_protocol == R9_915) // 915MHz
+		FrSkyR9_freq_map = FrSkyR9_freq_map_915;
+	else if(sub_protocol == R9_868) // 868MHz
+		FrSkyR9_freq_map = FrSkyR9_freq_map_868;
 
-	_step = 1 + (random(0xfefefefe) % 24);
-    _freq_map[27] = _freq_map[_step];
-	_freq_map[28] = _freq_map[_step+1];
+	FrSkyR9_step = 1 + (random(0xfefefefe) % 24);
+    FrSkyR9_freq_map[27] = FrSkyR9_freq_map[FrSkyR9_step];
+	FrSkyR9_freq_map[28] = FrSkyR9_freq_map[FrSkyR9_step+1];
 
 	SX1276_SetMode(true, false, SX1276_OPMODE_SLEEP);
 	SX1276_SetMode(true, false, SX1276_OPMODE_STDBY);
@@ -109,14 +109,14 @@ uint16_t initFrSkyR9()
 	SX1276_SetHopPeriod(0); // 0 = disabled, we hope frequencies manually
 	SX1276_SetPaDac(true);
 
+	hopping_frequency_no = 0;
+
 	// TODO this can probably be shorter
 	return 20000; // start calling FrSkyR9_callback in 20 milliseconds
 }
 
 uint16_t FrSkyR9_callback()
 {
-    static uint16_t freq_hop_index = 0;
-	
 	SX1276_SetMode(true, false, SX1276_OPMODE_STDBY);
 
 	//SX1276_WriteReg(SX1276_11_IRQFLAGSMASK, 0xbf); // use only RxDone interrupt
@@ -140,75 +140,61 @@ uint16_t FrSkyR9_callback()
 	// max power: 15dBm (10.8 + 0.6 * MaxPower [dBm])
 	// output_power: 2 dBm (17-(15-OutputPower) (if pa_boost_pin == true))
 	SX1276_SetPaConfig(true, 7, 0);
-	SX1276_SetFrequency(_freq_map[freq_hop_index]); // set current center frequency
+	SX1276_SetFrequency(FrSkyR9_freq_map[hopping_frequency_no]); // set current center frequency
 	
 	delayMicroseconds(500);
 
-	uint8_t payload[26];
-
-	payload[0] = 0x3C; // ????
-	payload[1] = rx_tx_addr[3]; // unique radio id
-	payload[2] = rx_tx_addr[2]; // unique radio id
-	payload[3] = freq_hop_index; // current channel index
-	payload[4] = _step; // step size and last 2 channels start index
-	payload[5] = RX_num; // receiver number from OpenTX
+	packet[0] = 0x3C; // ????
+	packet[1] = rx_tx_addr[3]; // unique radio id
+	packet[2] = rx_tx_addr[2]; // unique radio id
+	packet[3] = hopping_frequency_no; // current channel index
+	packet[4] = FrSkyR9_step; // step size and last 2 channels start index
+	packet[5] = RX_num; // receiver number from OpenTX
 
 	// binding mode: 0x00 regular / 0x41 bind?
 	if(IS_BIND_IN_PROGRESS)
-		payload[6] = 0x41; 
+		packet[6] = 0x41; 
 	else
-		payload[6] = 0x00;
+		packet[6] = 0x00;
 
 	// TODO
-	payload[7] = 0x00; // fail safe related (looks like the same sequence of numbers as FrskyX protocol)
+	packet[7] = 0x00; // fail safe related (looks like the same sequence of numbers as FrskyX protocol)
 
 	// two channel are spread over 3 bytes.
 	// each channel is 11 bit + 1 bit (msb) that states whether
 	// it's part of the upper channels (9-16) or lower (1-8) (0 - lower 1 - upper)
 
-	const int payload_offset = 8;
+	const uint8_t packet_offset = 8;
 	const bool is_upper = false;
 
-	int chan_index = 0;
+	uint8_t chan_index = 0;
 
 	for(int i = 0; i < 8; i += 3)
 	{
 		// map channel values (0-2047) to (64-1984)
-		//uint16_t ch1 = 64 + (uint16_t)((1920.0f / 2047.0f) * Channel_data[chan_index]);
-		//uint16_t ch2 = 64 + (uint16_t)((1920.0f / 2047.0f) * Channel_data[chan_index + 1]);
-
 		uint16_t ch1 = FrSkyX_scaleForPXX(chan_index);
 		uint16_t ch2 = FrSkyX_scaleForPXX(chan_index + 1);
 
+		packet[packet_offset + i] = ch1;
+		packet[packet_offset + i + 1] = (ch1 >> 8) | (ch2 << 4);
+		packet[packet_offset + i + 2] = (ch2 >> 4);
+
 		chan_index += 2;
-
-		payload[payload_offset + i] = ch1;
-
-		if(is_upper)
-		{
-			payload[payload_offset + i + 1] = ((ch1 >> 8) | 0b1000) | (ch2 << 4);
-			payload[payload_offset + i + 2] = (ch2 >> 4) | 0b10000000;
-		}
-		else
-		{
-			payload[payload_offset + i + 1] = ((ch1 >> 8) & 0b0111) | (ch2 << 4);
-			payload[payload_offset + i + 2] = (ch2 >> 4) & 0b01111111;
-		}
 	}
 	
-	payload[20] = 0x08; // ????
-	payload[21] = 0x00; // ????
-	payload[22] = 0x00; // ????
-	payload[23] = 0x00; // ????
+	packet[20] = 0x08; // ????
+	packet[21] = 0x00; // ????
+	packet[22] = 0x00; // ????
+	packet[23] = 0x00; // ????
 
-	uint16_t crc = FrSkyX_crc(payload, 24);
+	uint16_t crc = FrSkyX_crc(packet, 24);
 
-	payload[24] = crc; // low byte
-	payload[25] = crc >> 8; // high byte
+	packet[24] = crc; // low byte
+	packet[25] = crc >> 8; // high byte
 
-	SX1276_WritePayloadToFifo(payload, 26);
+	SX1276_WritePayloadToFifo(packet, 26);
 
-	freq_hop_index = (freq_hop_index + _step) % FREQ_MAP_SIZE;
+	hopping_frequency_no = (hopping_frequency_no + FrSkyR9_step) % FREQ_MAP_SIZE;
 
 	SX1276_SetMode(true, false, SX1276_OPMODE_TX);
 
diff --git a/Multiprotocol/Multi.txt b/Multiprotocol/Multi.txt
index 740d650..ab0e36f 100644
--- a/Multiprotocol/Multi.txt
+++ b/Multiprotocol/Multi.txt
@@ -62,3 +62,4 @@
 62,XK,X450,X420
 63,XN_DUMP,250K,1M,2M,AUTO
 64,FrskyX2,CH_16,CH_8,EU_16,EU_8
+65,FrSkyR9,915MHz,868MHz
diff --git a/Multiprotocol/Multiprotocol.h b/Multiprotocol/Multiprotocol.h
index 7f56565..80b2f64 100644
--- a/Multiprotocol/Multiprotocol.h
+++ b/Multiprotocol/Multiprotocol.h
@@ -19,7 +19,7 @@
 #define VERSION_MAJOR		1
 #define VERSION_MINOR		3
 #define VERSION_REVISION	0
-#define VERSION_PATCH_LEVEL	65
+#define VERSION_PATCH_LEVEL	66
 
 //******************
 // Protocols
@@ -91,7 +91,7 @@ enum PROTOCOLS
 	PROTO_XK		= 62,	// =>NRF24L01
 	PROTO_XN297DUMP	= 63,	// =>NRF24L01
 	PROTO_FRSKYX2	= 64,	// =>CC2500
-	PROTO_FRSKY_R9	= 65	// =>SX1276
+	PROTO_FRSKY_R9	= 65,	// =>SX1276
 };
 
 enum Flysky
@@ -327,6 +327,11 @@ enum XN297DUMP
 	XN297DUMP_2M	= 2,
 	XN297DUMP_AUTO	= 3,
 };
+enum FRSKY_R9
+{
+	R9_915	= 0,
+	R9_868	= 1,
+};
 
 #define NONE 		0
 #define P_HIGH		1
@@ -720,6 +725,8 @@ Serial: 100000 Baud 8e2      _ xxxx xxxx p --
 				TIGER		61
 				XK			62
 				XN297DUMP	63
+				FRSKYX2		64
+				FRSKY_R9	65
    BindBit=>		0x80	1=Bind/0=No
    AutoBindBit=>	0x40	1=Yes /0=No
    RangeCheck=>		0x20	1=Yes /0=No
@@ -873,6 +880,9 @@ Serial: 100000 Baud 8e2      _ xxxx xxxx p --
 		sub_protocol==V911S
 			V911S_STD	0
 			V911S_E119	1
+		sub_protocol==FRSKY_R9
+			R9_915	0
+			R9_868	1
 
    Power value => 0x80	0=High/1=Low
   Stream[3]   = option_protocol;
diff --git a/Multiprotocol/Validate.h b/Multiprotocol/Validate.h
index 910426c..0c554b6 100644
--- a/Multiprotocol/Validate.h
+++ b/Multiprotocol/Validate.h
@@ -180,6 +180,7 @@
 	#undef CC25_CSN_pin
 	#undef NRF24L01_INSTALLED	// Disable NRF for OrangeTX module
 	#undef NRF_CSN_pin
+	#undef SX1276_INSTALLED		// Disable NRF for OrangeTX module
 	#define TELEMETRY			// Enable telemetry
 	#define INVERT_TELEMETRY	// Enable invert telemetry
 	#define DSM_TELEMETRY		// Enable DSM telemetry
@@ -256,6 +257,12 @@
 	#undef	TIGER_NRF24L01_INO
 	#undef	XK_NRF24L01_INO
 #endif
+#if not defined(STM32_BOARD)
+	#undef SX1276_INSTALLED
+#endif
+#ifndef SX1276_INSTALLED
+	#undef FRSKYR9_SX1276_INO
+#endif
 
 //Make sure telemetry is selected correctly
 #ifndef TELEMETRY
diff --git a/Multiprotocol/_Config.h b/Multiprotocol/_Config.h
index 5c6e6c6..5fa85f0 100644
--- a/Multiprotocol/_Config.h
+++ b/Multiprotocol/_Config.h
@@ -77,7 +77,7 @@
 #define CYRF6936_INSTALLED
 #define CC2500_INSTALLED
 #define NRF24L01_INSTALLED
-//#define SX1276_INSTALLED
+//#define SX1276_INSTALLED		// only supported on STM32 modules
 
 /** OrangeRX TX **/
 //If you compile for the OrangeRX TX module you need to select the correct board type.
@@ -563,6 +563,9 @@ const PPM_Parameters PPM_prot[14*NBR_BANKS]=	{
 		NONE
 	PROTO_FRSKYD
 		NONE
+	PROTO_FRSKYR9
+		R9_915
+		R9_868
 	PROTO_FRSKYV
 		NONE
 	PROTO_FRSKYX
diff --git a/Protocols_Details.md b/Protocols_Details.md
index 697f55b..93c085c 100644
--- a/Protocols_Details.md
+++ b/Protocols_Details.md
@@ -88,6 +88,7 @@ CFlie|38|CFlie||||||||NRF24L01|
 [Flyzone](Protocols_Details.md#FLYZONE---53)|53|FZ410||||||||A7105|
 [FQ777](Protocols_Details.md#FQ777---23)|23|FQ777||||||||NRF24L01|SSV7241
 [FrskyD](Protocols_Details.md#FRSKYD---3)|3|FrskyD||||||||CC2500|
+[FrskyR9](Protocols_Details.md#FRSKYR9---65)|65|FrskyR9|R9_915|R9_868||||||SX1276|
 [FrskyV](Protocols_Details.md#FRSKYV---25)|25|FrskyV||||||||CC2500|
 [FrskyX](Protocols_Details.md#FRSKYX---15)|15|CH_16|CH_8|EU_16|EU_8|||||CC2500|
 [FrskyX_RX](Protocols_Details.md#FRSKYX_RX---55)|55|FCC|EU_LBT|||||CC2500|
@@ -1338,7 +1339,23 @@ CH1|CH2|CH3|CH4|CH5
 ---|---|---|---|---
 ||T|R|LIGHT
 
+# SX1276 RF Module
+
+## FRSKYR9 - *65*
+Extended limits supported
+
+CH1|CH2|CH3|CH4|CH5|CH6|CH7|CH8
+---|---|---|---|---|---|---|---
+A|E|T|R|CH5|CH6|CH7|CH8
+
+### Sub_protocol R9_915 - *0*
+915MHz
+
+### Sub_protocol R9_868 - *1*
+868MHz
+
 # OpenLRS module
 
 ## OpenLRS - *27*
 This is a reservation for OpenLRSng which is using Multi's serial protocol for their modules: https://openlrsng.org/. On the Multi side there is no protocol affected on 27 so it's just ignored.
+