diff --git a/src/main/rx/ibus.c b/src/main/rx/ibus.c
index f59f1ad44d..2921ac3cb5 100755
--- a/src/main/rx/ibus.c
+++ b/src/main/rx/ibus.c
@@ -44,15 +44,25 @@
 #include "rx/rx.h"
 #include "rx/ibus.h"
 
-#define IBUS_MAX_CHANNEL 10
+#define IBUS_MAX_CHANNEL 14
 #define IBUS_BUFFSIZE 32
-#define IBUS_SYNCBYTE 0x20
+#define IBUS_MODEL_IA6B 0
+#define IBUS_MODEL_IA6 1
+#define IBUS_FRAME_GAP 500
 
 #define IBUS_BAUDRATE 115200
 
+static uint8_t ibusModel;
+static uint8_t ibusSyncByte;
+static uint8_t ibusFrameSize;
+static uint8_t ibusChannelOffset;
+static uint16_t ibusChecksum;
+
 static bool ibusFrameDone = false;
 static uint32_t ibusChannelData[IBUS_MAX_CHANNEL];
 
+    ibusSyncByte = 0;
+
 static uint8_t ibus[IBUS_BUFFSIZE] = { 0, };
 
 // Receive ISR callback
@@ -64,17 +74,36 @@ static void ibusDataReceive(uint16_t c)
 
     ibusTime = micros();
 
-    if ((ibusTime - ibusTimeLast) > 3000)
+    if ((ibusTime - ibusTimeLast) > IBUS_FRAME_GAP)
         ibusFramePosition = 0;
 
     ibusTimeLast = ibusTime;
 
-    if (ibusFramePosition == 0 && c != IBUS_SYNCBYTE)
-        return;
+    if (ibusFramePosition == 0) {
+        if (ibusSyncByte == 0) {
+            // detect the frame type based on the STX byte.
+            if (c == 0x55) {
+                ibusModel = IBUS_MODEL_IA6;
+                ibusSyncByte = 0x55;
+                ibusFrameSize = 31;
+                ibusChecksum = 0x0000;
+                ibusChannelOffset = 1;
+            } else if (c == 0x20) {
+                ibusModel = IBUS_MODEL_IA6B;
+                ibusSyncByte = 0x20;
+                ibusFrameSize = 32;
+                ibusChannelOffset = 2;
+                ibusChecksum = 0xFFFF;
+            } else
+                return;
+        } else if (ibusSyncByte != c) {
+            return;
+        }
+    }
 
     ibus[ibusFramePosition] = (uint8_t)c;
 
-    if (ibusFramePosition == IBUS_BUFFSIZE - 1) {
+    if (ibusFramePosition == ibusFrameSize - 1) {
         ibusFrameDone = true;
     } else {
         ibusFramePosition++;
@@ -93,14 +122,18 @@ uint8_t ibusFrameStatus(void)
 
     ibusFrameDone = false;
 
-    chksum = 0xFFFF;
-    for (i = 0; i < 30; i++)
-        chksum -= ibus[i];
-
-    rxsum = ibus[30] + (ibus[31] << 8);
+    chksum = ibusChecksum;
+    rxsum = ibus[ibusFrameSize - 2] + (ibus[ibusFrameSize - 1] << 8);
+    if (ibusModel == IBUS_MODEL_IA6) {
+        for (i = 0, offset = ibusChannelOffset; i < IBUS_MAX_CHANNEL; i++, offset += 2)
+            chksum += ibus[offset] + (ibus[offset + 1] << 8);
+    } else {
+        for (i = 0; i < 30; i++)
+            chksum -= ibus[i];
+    }
 
     if (chksum == rxsum) {
-        for (i = 0, offset = 2; i < IBUS_MAX_CHANNEL; i++, offset += 2) {
+        for (i = 0, offset = ibusChannelOffset; i < IBUS_MAX_CHANNEL; i++, offset += 2) {
             ibusChannelData[i] = ibus[offset] + (ibus[offset + 1] << 8);
         }
         frameStatus = RX_FRAME_COMPLETE;
diff --git a/src/main/target/KISSFC/target.h b/src/main/target/KISSFC/target.h
index e532b9d782..7eff58c7bf 100644
--- a/src/main/target/KISSFC/target.h
+++ b/src/main/target/KISSFC/target.h
@@ -69,7 +69,7 @@
 #define DEFAULT_FEATURES        FEATURE_VBAT
 #define DEFAULT_RX_FEATURE      FEATURE_RX_SERIAL
 #define SERIALRX_PROVIDER       SERIALRX_SBUS
-#define SERIALRX_UART           SERIAL_PORT_USART2
+#define SERIALRX_UART           SERIAL_PORT_USART3
 
 #define AVOID_UART2_FOR_PWM_PPM