diff --git a/main.cpp b/main.cpp
index 140b77c..211302b 100644
--- a/main.cpp
+++ b/main.cpp
@@ -46,7 +46,7 @@ void sendData(uint8_t *data, size_t len) {
 }
 
 void transferSPI(uint8_t address, uint8_t *data, size_t datalen) {
-	SPI.beginTransaction(SPISettings(14000000, MSBFIRST, SPI_MODE0));
+	SPI.beginTransaction(SPISettings(14000000, MSBFIRST, SPI_MODE3));
 	CS_PORT = ~address;
 	SPI.transfer(data, datalen);
 	delay(100);
@@ -63,14 +63,14 @@ void handlePacket(uint8_t *packet, size_t packetLen) {
 	uint16_t crc = Calculate_CRC(packet, packetLen);
 
 	if (crc != 0) {
-		//Serial.println("invalid Checksum");
+		Serial.println("invalid Checksum");
 		return;
 	}
 
 	uint16_t payloadLen = (packet[2] << 8) | packet[3];
 
 	if (payloadLen != packetLen - 6) {
-		//Serial.println("invalid len");
+		Serial.println("invalid len");
 		return;
 	}
 
@@ -85,7 +85,7 @@ void handlePacket(uint8_t *packet, size_t packetLen) {
 		sendData(packet, packetLen);
 		break;
 	default:
-		//Serial.println("invalid command");
+		Serial.println("invalid command");
 		break;
 	}