diff --git a/RNode_Firmware.ino b/RNode_Firmware.ino
index fda5a46..8921fd9 100644
--- a/RNode_Firmware.ino
+++ b/RNode_Firmware.ino
@@ -363,7 +363,7 @@ void transmit(uint16_t size) {
       LoRa.beginPacket();
       LoRa.write(header); written++;
 
-      for (uint16_t i; i < size; i++) {
+      for (int i=0; i < size; i++) {
         LoRa.write(tbuf[i]);  
 
         written++;
@@ -400,7 +400,7 @@ void transmit(uint16_t size) {
         LoRa.beginPacket(size);
       }
 
-      for (uint16_t i; i < size; i++) {
+      for (int i=0; i < size; i++) {
         LoRa.write(tbuf[i]);
 
         written++;
@@ -805,7 +805,7 @@ void buffer_serial() {
       // Discard GPS data for now
       c = 0;
       while (c < MAX_CYCLES && Serial1.available()) {
-        uint8_t void_c = Serial1.read();
+        Serial1.read();
       }
     #endif
 
diff --git a/Utilities.h b/Utilities.h
index 5be1ccf..8589491 100644
--- a/Utilities.h
+++ b/Utilities.h
@@ -210,10 +210,10 @@ int8_t  led_standby_direction = 0;
 	}
 #endif
 
-void escapedSerialWrite(uint8_t byte) {
-	if (byte == FEND) { Serial.write(FESC); byte = TFEND; }
-    if (byte == FESC) { Serial.write(FESC); byte = TFESC; }
-    Serial.write(byte);
+void escapedSerialWrite(uint8_t vbyte) {
+	if (vbyte == FEND) { Serial.write(FESC); vbyte = TFEND; }
+    if (vbyte == FESC) { Serial.write(FESC); vbyte = TFESC; }
+    Serial.write(vbyte);
 }
 
 void kiss_indicate_reset() {
@@ -327,10 +327,10 @@ void kiss_indicate_frequency() {
 	Serial.write(FEND);
 }
 
-void kiss_indicate_random(uint8_t byte) {
+void kiss_indicate_random(uint8_t vbyte) {
 	Serial.write(FEND);
 	Serial.write(CMD_RANDOM);
-	Serial.write(byte);
+	Serial.write(vbyte);
 	Serial.write(FEND);
 }
 
@@ -474,22 +474,22 @@ bool eeprom_info_locked() {
 
 void eeprom_dump_info() {
 	for (int addr = ADDR_PRODUCT; addr <= ADDR_INFO_LOCK; addr++) {
-		uint8_t byte = EEPROM.read(eeprom_addr(addr));
-		escapedSerialWrite(byte);
+		uint8_t vbyte = EEPROM.read(eeprom_addr(addr));
+		escapedSerialWrite(vbyte);
 	}
 }
 
 void eeprom_dump_config() {
 	for (int addr = ADDR_CONF_SF; addr <= ADDR_CONF_OK; addr++) {
-		uint8_t byte = EEPROM.read(eeprom_addr(addr));
-		escapedSerialWrite(byte);
+		uint8_t vbyte = EEPROM.read(eeprom_addr(addr));
+		escapedSerialWrite(vbyte);
 	}
 }
 
 void eeprom_dump_all() {
 	for (int addr = 0; addr < EEPROM_RESERVED; addr++) {
-		uint8_t byte = EEPROM.read(eeprom_addr(addr));
-		escapedSerialWrite(byte);
+		uint8_t vbyte = EEPROM.read(eeprom_addr(addr));
+		escapedSerialWrite(vbyte);
 	}
 }
 
@@ -500,12 +500,12 @@ void kiss_dump_eeprom() {
 	Serial.write(FEND);
 }
 
-void eeprom_update(int mapped_addr, uint8_t byte) {
+void eeprom_update(int mapped_addr, uint8_t vbyte) {
 	#if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
-		EEPROM.update(mapped_addr, byte);
+		EEPROM.update(mapped_addr, vbyte);
 	#elif MCU_VARIANT == MCU_ESP32
-		if (EEPROM.read(mapped_addr) != byte) {
-			EEPROM.write(mapped_addr, byte);
+		if (EEPROM.read(mapped_addr) != vbyte) {
+			EEPROM.write(mapped_addr, vbyte);
 			EEPROM.commit();
 		}
 	#endif
@@ -565,8 +565,8 @@ bool eeprom_hwrev_valid() {
 bool eeprom_checksum_valid() {
 	char *data = (char*)malloc(CHECKSUMMED_SIZE);
 	for (uint8_t  i = 0; i < CHECKSUMMED_SIZE; i++) {
-		char byte = EEPROM.read(eeprom_addr(i));
-		data[i] = byte;
+		char vbyte = EEPROM.read(eeprom_addr(i));
+		data[i] = vbyte;
 	}
 	
 	unsigned char *hash = MD5::make_hash(data, CHECKSUMMED_SIZE);