diff --git a/src/Module.cpp b/src/Module.cpp
index 6e907f01..7d02d9a0 100644
--- a/src/Module.cpp
+++ b/src/Module.cpp
@@ -472,7 +472,7 @@ void Module::hexdump(const char* level, uint8_t* data, size_t len, uint32_t offs
   size_t rem_len = len;
   for(size_t i = 0; i < len; i+=16) {
     char str[120];
-    sprintf(str, "%07" PRIx32 "  ", i+offset);
+    sprintf(str, "%07" PRIx32 "  ", (uint32_t)i+offset);
     size_t line_len = 16;
     if(rem_len < line_len) {
       line_len = rem_len;
diff --git a/src/modules/SX126x/SX126x.cpp b/src/modules/SX126x/SX126x.cpp
index de010d68..105d1fda 100644
--- a/src/modules/SX126x/SX126x.cpp
+++ b/src/modules/SX126x/SX126x.cpp
@@ -638,7 +638,7 @@ int16_t SX126x::startReceiveDutyCycleAuto(uint16_t senderPreambleLength, uint16_
 
   uint32_t symbolLength = ((uint32_t)(10 * 1000) << this->spreadingFactor) / (10 * this->bandwidthKhz);
   uint32_t sleepPeriod = symbolLength * sleepSymbols;
-  RADIOLIB_DEBUG_BASIC_PRINTLN("Auto sleep period: %lu", sleepPeriod);
+  RADIOLIB_DEBUG_BASIC_PRINTLN("Auto sleep period: %lu", (long unsigned int)sleepPeriod);
 
   // when the unit detects a preamble, it starts a timer that will timeout if it doesn't receive a header in time.
   // the duration is sleepPeriod + 2 * wakePeriod.
@@ -649,7 +649,7 @@ int16_t SX126x::startReceiveDutyCycleAuto(uint16_t senderPreambleLength, uint16_
   uint32_t wakePeriod = RADIOLIB_MAX(
     (symbolLength * (senderPreambleLength + 1) - (sleepPeriod - 1000)) / 2, // (A)
     symbolLength * (minSymbols + 1)); //(B)
-  RADIOLIB_DEBUG_BASIC_PRINTLN("Auto wake period: %lu", wakePeriod);
+  RADIOLIB_DEBUG_BASIC_PRINTLN("Auto wake period: %lu", (long unsigned int)wakePeriod);
 
   // If our sleep period is shorter than our transition time, just use the standard startReceive
   if(sleepPeriod < this->tcxoDelay + 1016) {
diff --git a/src/modules/Si443x/Si443x.cpp b/src/modules/Si443x/Si443x.cpp
index f25ac9d6..c6a225af 100644
--- a/src/modules/Si443x/Si443x.cpp
+++ b/src/modules/Si443x/Si443x.cpp
@@ -771,7 +771,7 @@ int16_t Si443x::updateClockRecovery() {
   // print that whole mess
   RADIOLIB_DEBUG_BASIC_PRINTLN("%X\n%X\n%X", bypass, decRate, manch);
   RADIOLIB_DEBUG_BASIC_PRINT_FLOAT(rxOsr, 2);
-  RADIOLIB_DEBUG_BASIC_PRINTLN("\t%d\t%X\n%lu\t%lX\n%d\t%X", rxOsr_fixed, rxOsr_fixed, ncoOff, ncoOff, crGain, crGain);
+  RADIOLIB_DEBUG_BASIC_PRINTLN("\t%d\t%X\n%lu\t%lX\n%d\t%X", rxOsr_fixed, rxOsr_fixed, (long unsigned int)ncoOff, (long unsigned int)ncoOff, crGain, crGain);
 
   // update oversampling ratio
   int16_t state = this->mod->SPIsetRegValue(RADIOLIB_SI443X_REG_CLOCK_REC_OFFSET_2, (uint8_t)((rxOsr_fixed & 0x0700) >> 3), 7, 5);
diff --git a/src/protocols/LoRaWAN/LoRaWAN.cpp b/src/protocols/LoRaWAN/LoRaWAN.cpp
index 03d2a7f0..24ea83ed 100644
--- a/src/protocols/LoRaWAN/LoRaWAN.cpp
+++ b/src/protocols/LoRaWAN/LoRaWAN.cpp
@@ -543,7 +543,7 @@ int16_t LoRaWANNode::beginOTAA(uint64_t joinEUI, uint64_t devEUI, uint8_t* nwkKe
   // check received length
   size_t lenRx = this->phyLayer->getPacketLength(true);
   if((lenRx != RADIOLIB_LORAWAN_JOIN_ACCEPT_MAX_LEN) && (lenRx != RADIOLIB_LORAWAN_JOIN_ACCEPT_MAX_LEN - RADIOLIB_LORAWAN_JOIN_ACCEPT_CFLIST_LEN)) {
-    RADIOLIB_DEBUG_PROTOCOL_PRINTLN("joinAccept reply length mismatch, expected %luB got %luB", RADIOLIB_LORAWAN_JOIN_ACCEPT_MAX_LEN, lenRx);
+    RADIOLIB_DEBUG_PROTOCOL_PRINTLN("joinAccept reply length mismatch, expected %dB got %luB", RADIOLIB_LORAWAN_JOIN_ACCEPT_MAX_LEN, lenRx);
     return(RADIOLIB_ERR_DOWNLINK_MALFORMED);
   }
 
@@ -1179,7 +1179,7 @@ int16_t LoRaWANNode::downlinkCommon() {
 
     // open Rx window by starting receive with specified timeout
     state = this->phyLayer->startReceive(timeoutMod, irqFlags, irqMask, 0);
-    RADIOLIB_DEBUG_PROTOCOL_PRINTLN("Opening Rx%d window (%d us timeout)... <-- Rx Delay end ", i+1, timeoutHost);
+    RADIOLIB_DEBUG_PROTOCOL_PRINTLN("Opening Rx%d window (%d us timeout)... <-- Rx Delay end ", i+1, (int)timeoutHost);
     
     // wait for the timeout to complete (and a small additional delay)
     mod->hal->delay(timeoutHost / 1000 + scanGuard / 2);
diff --git a/src/protocols/Morse/Morse.cpp b/src/protocols/Morse/Morse.cpp
index 90cc2a68..b41dae76 100644
--- a/src/protocols/Morse/Morse.cpp
+++ b/src/protocols/Morse/Morse.cpp
@@ -104,7 +104,7 @@ int MorseClient::read(uint8_t* symbol, uint8_t* len, float low, float high) {
       (*symbol) |= (RADIOLIB_MORSE_DASH << (*len));
       (*len)++;
     } else {
-      RADIOLIB_DEBUG_PROTOCOL_PRINTLN("<len=%lums>", signalLen);
+      RADIOLIB_DEBUG_PROTOCOL_PRINTLN("<len=%lums>", (long unsigned int)signalLen);
     }
   }
 
diff --git a/src/protocols/Pager/Pager.cpp b/src/protocols/Pager/Pager.cpp
index 50151877..48edee62 100644
--- a/src/protocols/Pager/Pager.cpp
+++ b/src/protocols/Pager/Pager.cpp
@@ -554,7 +554,7 @@ uint32_t PagerClient::read() {
     codeWord = ~codeWord;
   }
 
-  RADIOLIB_DEBUG_PROTOCOL_PRINTLN("R\t%lX", codeWord);
+  RADIOLIB_DEBUG_PROTOCOL_PRINTLN("R\t%lX", (long unsigned int)codeWord);
   // TODO BCH error correction here
   return(codeWord);
 }
diff --git a/src/protocols/PhysicalLayer/PhysicalLayer.cpp b/src/protocols/PhysicalLayer/PhysicalLayer.cpp
index 55e69329..293402ae 100644
--- a/src/protocols/PhysicalLayer/PhysicalLayer.cpp
+++ b/src/protocols/PhysicalLayer/PhysicalLayer.cpp
@@ -419,7 +419,7 @@ void PhysicalLayer::updateDirectBuffer(uint8_t bit) {
     this->syncBuffer <<= 1;
     this->syncBuffer |= bit;
 
-    RADIOLIB_DEBUG_PROTOCOL_PRINTLN("S\t%lu", this->syncBuffer);
+    RADIOLIB_DEBUG_PROTOCOL_PRINTLN("S\t%lu", (long unsigned int)this->syncBuffer);
 
     if((this->syncBuffer & this->directSyncWordMask) == this->directSyncWord) {
       this->gotSync = true;