diff --git a/src/BLECharacteristic.cpp b/src/BLECharacteristic.cpp
index 6db7b72e..956f74d9 100644
--- a/src/BLECharacteristic.cpp
+++ b/src/BLECharacteristic.cpp
@@ -383,7 +383,7 @@ bool BLECharacteristic::hasDescriptor(const char* uuid, int index) const
     for (int i = 0; i < numDescriptors; i++) {
       BLERemoteDescriptor* d = _remote->descriptor(i);
 
-      if (strcmp(uuid, d->uuid()) == 0) {
+      if (strcasecmp(uuid, d->uuid()) == 0) {
         if (count == index) {
           return true;
         }
@@ -419,7 +419,7 @@ BLEDescriptor BLECharacteristic::descriptor(const char * uuid, int index) const
     for (int i = 0; i < numDescriptors; i++) {
       BLERemoteDescriptor* d = _remote->descriptor(i);
 
-      if (strcmp(uuid, d->uuid()) == 0) {
+      if (strcasecmp(uuid, d->uuid()) == 0) {
         if (count == index) {
           return BLEDescriptor(d);
         }
diff --git a/src/BLEDevice.cpp b/src/BLEDevice.cpp
index a74c1d9c..fa806104 100644
--- a/src/BLEDevice.cpp
+++ b/src/BLEDevice.cpp
@@ -310,7 +310,7 @@ bool BLEDevice::hasService(const char* uuid, int index) const
     for (int i = 0; i < numServices; i++) {
       BLERemoteService* s = device->service(i);
 
-      if (strcmp(uuid, s->uuid()) == 0) {
+      if (strcasecmp(uuid, s->uuid()) == 0) {
         if (count == index) {
           return true;
         }
@@ -352,7 +352,7 @@ BLEService BLEDevice::service(const char * uuid, int index) const
     for (int i = 0; i < numServices; i++) {
       BLERemoteService* s = device->service(i);
 
-      if (strcmp(uuid, s->uuid()) == 0) {
+      if (strcasecmp(uuid, s->uuid()) == 0) {
         if (count == index) {
           return BLEService(s);
         }
@@ -405,7 +405,7 @@ bool BLEDevice::hasCharacteristic(const char* uuid, int index) const
         BLERemoteCharacteristic* c = s->characteristic(j);
 
 
-        if (strcmp(c->uuid(), uuid) == 0) {
+        if (strcasecmp(c->uuid(), uuid) == 0) {
           if (count == index) {
             return true;
           }
@@ -468,7 +468,7 @@ BLECharacteristic BLEDevice::characteristic(const char * uuid, int index) const
       for (int j = 0; j < numCharacteristics; j++) {
         BLERemoteCharacteristic* c = s->characteristic(j);
 
-        if (strcmp(c->uuid(), uuid) == 0) {
+        if (strcasecmp(c->uuid(), uuid) == 0) {
           if (count == index) {
 
             return BLECharacteristic(c);
diff --git a/src/BLEService.cpp b/src/BLEService.cpp
index 7f80663a..7b5df148 100644
--- a/src/BLEService.cpp
+++ b/src/BLEService.cpp
@@ -122,7 +122,7 @@ bool BLEService::hasCharacteristic(const char* uuid, int index) const
     for (int i = 0; i < numCharacteristics; i++) {
       BLERemoteCharacteristic* c = _remote->characteristic(i);
 
-      if (strcmp(uuid, c->uuid()) == 0) {
+      if (strcasecmp(uuid, c->uuid()) == 0) {
         if (count == index) {
           return true;
         }
@@ -158,7 +158,7 @@ BLECharacteristic BLEService::characteristic(const char * uuid, int index) const
     for (int i = 0; i < numCharacteristics; i++) {
       BLERemoteCharacteristic* c = _remote->characteristic(i);
 
-      if (strcmp(uuid, c->uuid()) == 0) {
+      if (strcasecmp(uuid, c->uuid()) == 0) {
         if (count == index) {
           return BLECharacteristic(c);
         }
diff --git a/src/utility/ATT.cpp b/src/utility/ATT.cpp
index d46b2e2f..dfa0838a 100644
--- a/src/utility/ATT.cpp
+++ b/src/utility/ATT.cpp
@@ -193,7 +193,7 @@ bool ATTClass::discoverAttributes(uint8_t peerBdaddrType, uint8_t peerBdaddr[6],
     for (int i = 0; i < serviceCount; i++) {
       BLERemoteService* service = device->service(i);
 
-      if (strcmp(service->uuid(), serviceUuidFilter) == 0) {
+      if (strcasecmp(service->uuid(), serviceUuidFilter) == 0) {
         // found an existing service with same UUID
         return true;
       }
diff --git a/src/utility/GAP.cpp b/src/utility/GAP.cpp
index 78b1556e..e4ab45f9 100644
--- a/src/utility/GAP.cpp
+++ b/src/utility/GAP.cpp
@@ -328,11 +328,11 @@ void GAPClass::handleLeAdvertisingReport(uint8_t type, uint8_t addressType, uint
 
 bool GAPClass::matchesScanFilter(const BLEDevice& device)
 {
-  if (_scanAddressFilter.length() > 0 && _scanAddressFilter != device.address()) {
+  if (_scanAddressFilter.length() > 0 && !(_scanAddressFilter.equalsIgnoreCase(device.address()))) {
     return false; // drop doesn't match
   } else if (_scanNameFilter.length() > 0 && _scanNameFilter != device.localName()) {
     return false; // drop doesn't match
-  } else if (_scanUuidFilter.length() > 0 && _scanUuidFilter != device.advertisedServiceUuid()) {
+  } else if (_scanUuidFilter.length() > 0 && !(_scanUuidFilter.equalsIgnoreCase(device.advertisedServiceUuid()))) {
     return false; // drop doesn't match
   }