diff --git a/.vscode/arduino.json b/.vscode/arduino.json
index 8b7bafb..bfcb771 100644
--- a/.vscode/arduino.json
+++ b/.vscode/arduino.json
@@ -1,6 +1,6 @@
 {
     "board": "bsfrance:avr:lora32u4",
     "sketch": "crossbow.ino",
-    "port": "COM15",
+    "port": "COM19",
     "output": "./build"
 }
\ No newline at end of file
diff --git a/crossbow.ino b/crossbow.ino
index 02c31d4..95dc25a 100644
--- a/crossbow.ino
+++ b/crossbow.ino
@@ -272,14 +272,14 @@ void loop(void)
 
 #ifdef DEVICE_MODE_TX
     if (txDeviceState.readPacket) {
-        int incomingByte = LoRa.read();
-        if (incomingByte > -1) {
+        int incomingByte;
+        while (incomingByte = LoRa.read(), incomingByte > -1)
+        {
             qspDecodeIncomingFrame(&qsp, incomingByte, ppm, &rxDeviceState, &txDeviceState);
-        } else {
-            txDeviceState.rssi = getRadioRssi();
-            txDeviceState.snr = getRadioSnr();
-            txDeviceState.readPacket = false;
         }
+        txDeviceState.rssi = getRadioRssi();
+        txDeviceState.snr = getRadioSnr();
+        txDeviceState.readPacket = false;
     }
 #endif
 
diff --git a/qsp.cpp b/qsp.cpp
index 942210d..4db0014 100644
--- a/qsp.cpp
+++ b/qsp.cpp
@@ -161,7 +161,7 @@ void qspDecodeIncomingFrame(
         {
             qsp->frameDecodingStartedAt = millis();
             qsp->protocolState = QSP_STATE_CHANNEL_RECEIVED;
-            qsp->crc ^= incomingByte;
+            qsp->crc = 0 ^ incomingByte;
 
             qspClearPayload(qsp);
 
diff --git a/variables.h b/variables.h
index 7c1d135..dea7656 100644
--- a/variables.h
+++ b/variables.h
@@ -18,7 +18,7 @@
 #define CHANNEL_ID 0x01
 #define QSP_PAYLOAD_LENGTH 32
 
-#define QSP_MAX_FRAME_DECODE_TIME 10 //max time that frame can be decoded in ms
+#define QSP_MAX_FRAME_DECODE_TIME 5 //max time that frame can be decoded in ms
 
 #define QSP_FRAME_RC_DATA 0x0
 #define QSP_FRAME_RX_HEALTH 0x1