diff --git a/examples/application/soracom-gps-tracker/soracom-gps-tracker.ino b/examples/application/soracom-gps-tracker/soracom-gps-tracker.ino
index a29f499..8d4fdd2 100644
--- a/examples/application/soracom-gps-tracker/soracom-gps-tracker.ino
+++ b/examples/application/soracom-gps-tracker/soracom-gps-tracker.ino
@@ -9,6 +9,7 @@
 //   http://librarymanager#ArduinoJson 7.0.4
 
 #include <Adafruit_TinyUSB.h>
+#include <csignal>
 #include <WioCellular.h>
 #include <ArduinoJson.h>
 
@@ -28,6 +29,15 @@ static constexpr int RECEIVE_TIMEOUT = 1000 * 10;   // [ms]
     if ((result) != WioCellularResult::Ok) abort(); \
   } while (0)
 
+static void abortHandler(int sig) {
+  while (true) {
+    ledOn(LED_BUILTIN);
+    delay(100);
+    ledOff(LED_BUILTIN);
+    delay(100);
+  }
+}
+
 static uint32_t MeasureTime = -INTERVAL;
 static String LatestGpsData;
 
@@ -36,6 +46,7 @@ static constexpr int SOCKET_ID = 0;
 static JsonDocument JsonDoc;
 
 void setup(void) {
+  signal(SIGABRT, abortHandler);
   Serial.begin(115200);
   {
     const auto start = millis();
diff --git a/examples/basic/flash/flash.ino b/examples/basic/flash/flash.ino
index eabe6e6..2f528f8 100644
--- a/examples/basic/flash/flash.ino
+++ b/examples/basic/flash/flash.ino
@@ -10,8 +10,18 @@
 //   http://librarymanager#SdFat%20-%20Adafruit%20Fork 2.2.3
 
 #include <Adafruit_TinyUSB.h>
+#include <csignal>
 #include <Adafruit_SPIFlash.h>
 
+static void abortHandler(int sig) {
+  while (true) {
+    ledOn(LED_BUILTIN);
+    delay(100);
+    ledOff(LED_BUILTIN);
+    delay(100);
+  }
+}
+
 static const SPIFlash_Device_t SPIFLASH_DEVICE = FERAM_DEVICE_CONFIG;
 
 static SPIClass FlashSpi(FERAM_SPI, PIN_FERAM_SO, PIN_FERAM_SCK, PIN_FERAM_SI);
@@ -19,6 +29,7 @@ static Adafruit_FlashTransport_SPI FlashTransport(PIN_FERAM_CS, FlashSpi);
 static Adafruit_SPIFlash Flash(&FlashTransport);
 
 void setup(void) {
+  signal(SIGABRT, abortHandler);
   Serial.begin(115200);
   {
     const auto start = millis();
diff --git a/examples/cellular/cellular-status/cellular-status.ino b/examples/cellular/cellular-status/cellular-status.ino
index 6e79f97..fbc8f14 100644
--- a/examples/cellular/cellular-status/cellular-status.ino
+++ b/examples/cellular/cellular-status/cellular-status.ino
@@ -5,12 +5,23 @@
  */
 
 #include <Adafruit_TinyUSB.h>
+#include <csignal>
 #include <WioCellular.h>
 
 static constexpr int INTERVAL = 1000 * 5;           // [ms]
 static constexpr int POWER_ON_TIMEOUT = 1000 * 20;  // [ms]
 
+static void abortHandler(int sig) {
+  while (true) {
+    ledOn(LED_BUILTIN);
+    delay(100);
+    ledOff(LED_BUILTIN);
+    delay(100);
+  }
+}
+
 void setup(void) {
+  signal(SIGABRT, abortHandler);
   Serial.begin(115200);
   {
     const auto start = millis();
diff --git a/examples/cellular/shell/shell.ino b/examples/cellular/shell/shell.ino
index f9ab602..cf80b98 100644
--- a/examples/cellular/shell/shell.ino
+++ b/examples/cellular/shell/shell.ino
@@ -9,6 +9,7 @@
 //   https://github.com/matsujirushi/ntshell 0.3.1
 
 #include <Adafruit_TinyUSB.h>
+#include <csignal>
 #include <nrfx_power.h>
 #include <ntshell.h>     // Natural Tiny Shell
 #include <util/ntopt.h>  // Natural Tiny Shell
@@ -21,6 +22,15 @@ static const char APN[] = "soracom.io";
 static constexpr int POWER_ON_TIMEOUT = 1000 * 20;  // [ms]
 static constexpr int RECEIVE_TIMEOUT = 1000 * 10;   // [ms]
 
+static void abortHandler(int sig) {
+  while (true) {
+    ledOn(LED_BUILTIN);
+    delay(100);
+    ledOff(LED_BUILTIN);
+    delay(100);
+  }
+}
+
 static constexpr int SOCKET_ID = 0;
 
 static ntshell_t Shell;
@@ -71,6 +81,7 @@ static const CommandType CommandList[] = {
 };
 
 void setup(void) {
+  signal(SIGABRT, abortHandler);
   Serial.begin(115200);
   {
     const auto start = millis();
diff --git a/examples/cellular/transparent/transparent.ino b/examples/cellular/transparent/transparent.ino
index a831321..78301a7 100644
--- a/examples/cellular/transparent/transparent.ino
+++ b/examples/cellular/transparent/transparent.ino
@@ -5,11 +5,22 @@
  */
 
 #include <Adafruit_TinyUSB.h>
+#include <csignal>
 #include <WioCellular.h>
 
 static constexpr int POWER_ON_TIMEOUT = 1000 * 20;  // [ms]
 
+static void abortHandler(int sig) {
+  while (true) {
+    ledOn(LED_BUILTIN);
+    delay(100);
+    ledOff(LED_BUILTIN);
+    delay(100);
+  }
+}
+
 void setup(void) {
+  signal(SIGABRT, abortHandler);
   Serial.begin(115200);
   {
     const auto start = millis();
diff --git a/examples/soracom/soracom-connectivity-diagnostics/soracom-connectivity-diagnostics.ino b/examples/soracom/soracom-connectivity-diagnostics/soracom-connectivity-diagnostics.ino
index 2b9f2a9..1071b09 100644
--- a/examples/soracom/soracom-connectivity-diagnostics/soracom-connectivity-diagnostics.ino
+++ b/examples/soracom/soracom-connectivity-diagnostics/soracom-connectivity-diagnostics.ino
@@ -13,6 +13,7 @@
  */
 
 #include <Adafruit_TinyUSB.h>
+#include <csignal>
 #include <WioCellular.h>
 
 static constexpr int POWER_ON_TIMEOUT = 1000 * 20;  // [ms]
@@ -23,6 +24,15 @@ static constexpr int POWER_ON_TIMEOUT = 1000 * 20;  // [ms]
     if ((result) != WioCellularResult::Ok) abort(); \
   } while (0)
 
+static void abortHandler(int sig) {
+  while (true) {
+    ledOn(LED_BUILTIN);
+    delay(100);
+    ledOff(LED_BUILTIN);
+    delay(100);
+  }
+}
+
 static WioCellularResult queryCommand(const char *command, int timeout) {
   CONSOLE.print("> ");
   CONSOLE.println(command);
@@ -162,6 +172,7 @@ static void pingToSoracomNetwork(void) {
 }
 
 void setup(void) {
+  signal(SIGABRT, abortHandler);
   Serial.begin(115200);
   {
     const auto start = millis();
diff --git a/examples/soracom/soracom-uptime-httpclient/soracom-uptime-httpclient.ino b/examples/soracom/soracom-uptime-httpclient/soracom-uptime-httpclient.ino
index 4743012..669b5ac 100644
--- a/examples/soracom/soracom-uptime-httpclient/soracom-uptime-httpclient.ino
+++ b/examples/soracom/soracom-uptime-httpclient/soracom-uptime-httpclient.ino
@@ -10,6 +10,7 @@
 //   http://librarymanager#ArduinoHttpClient 0.6.1
 
 #include <Adafruit_TinyUSB.h>
+#include <csignal>
 #include <map>
 #include <WioCellular.h>
 #include <ArduinoJson.h>
@@ -27,17 +28,26 @@ static constexpr int INTERVAL = 1000 * 60 * 5;      // [ms]
 static constexpr int POWER_ON_TIMEOUT = 1000 * 20;  // [ms]
 static constexpr int RECEIVE_TIMEOUT = 1000 * 10;   // [ms]
 
-#define ABORT_IF_FAILED(result) \
-  do { \
-    if ((result) != WioCellularResult::Ok) abort(); \
-  } while (0)
-
 struct HttpResponse {
   int statusCode;
   std::map<std::string, std::string> headers;
   std::string body;
 };
 
+#define ABORT_IF_FAILED(result) \
+  do { \
+    if ((result) != WioCellularResult::Ok) abort(); \
+  } while (0)
+
+static void abortHandler(int sig) {
+  while (true) {
+    ledOn(LED_BUILTIN);
+    delay(100);
+    ledOff(LED_BUILTIN);
+    delay(100);
+  }
+}
+
 static constexpr int PDP_CONTEXT_ID = 1;
 static constexpr int SOCKET_ID = 0;
 
@@ -45,6 +55,7 @@ static JsonDocument JsonDoc;
 static WioCellularTcpClient<WioCellularModule> TcpClient{ WioCellular, PDP_CONTEXT_ID, SOCKET_ID };
 
 void setup(void) {
+  signal(SIGABRT, abortHandler);
   Serial.begin(115200);
   {
     const auto start = millis();
diff --git a/examples/soracom/soracom-uptime-lp/soracom-uptime-lp.ino b/examples/soracom/soracom-uptime-lp/soracom-uptime-lp.ino
index 9897a56..be3a75f 100644
--- a/examples/soracom/soracom-uptime-lp/soracom-uptime-lp.ino
+++ b/examples/soracom/soracom-uptime-lp/soracom-uptime-lp.ino
@@ -9,6 +9,7 @@
 //   http://librarymanager#ArduinoJson 7.0.4
 
 #include <Adafruit_TinyUSB.h>
+#include <csignal>
 #include <WioCellular.h>
 #include <ArduinoJson.h>
 
@@ -31,6 +32,15 @@ static constexpr int RECEIVE_TIMEOUT = 1000 * 10;     // [ms]
     if ((result) != WioCellularResult::Ok) abort(); \
   } while (0)
 
+static void abortHandler(int sig) {
+  while (true) {
+    ledOn(LED_BUILTIN);
+    delay(100);
+    ledOff(LED_BUILTIN);
+    delay(100);
+  }
+}
+
 static SemaphoreHandle_t CellularWorkSem;
 static SemaphoreHandle_t CellularStartSem;
 static SemaphoreHandle_t MeasureSem;
@@ -39,6 +49,7 @@ static QueueSetHandle_t QueueSet;
 static JsonDocument JsonDoc;
 
 void setup(void) {
+  signal(SIGABRT, abortHandler);
   Serial.begin(115200);
   {
     const auto start = millis();
diff --git a/examples/soracom/soracom-uptime-tcpclient/soracom-uptime-tcpclient.ino b/examples/soracom/soracom-uptime-tcpclient/soracom-uptime-tcpclient.ino
index ba3764d..a51b1d8 100644
--- a/examples/soracom/soracom-uptime-tcpclient/soracom-uptime-tcpclient.ino
+++ b/examples/soracom/soracom-uptime-tcpclient/soracom-uptime-tcpclient.ino
@@ -9,6 +9,7 @@
 //   http://librarymanager#ArduinoJson 7.0.4
 
 #include <Adafruit_TinyUSB.h>
+#include <csignal>
 #include <WioCellular.h>
 #include <ArduinoJson.h>
 
@@ -28,6 +29,15 @@ static constexpr int RECEIVE_TIMEOUT = 1000 * 10;   // [ms]
     if ((result) != WioCellularResult::Ok) abort(); \
   } while (0)
 
+static void abortHandler(int sig) {
+  while (true) {
+    ledOn(LED_BUILTIN);
+    delay(100);
+    ledOff(LED_BUILTIN);
+    delay(100);
+  }
+}
+
 static constexpr int PDP_CONTEXT_ID = 1;
 static constexpr int SOCKET_ID = 0;
 
@@ -35,6 +45,7 @@ static JsonDocument JsonDoc;
 static WioCellularTcpClient<WioCellularModule> TcpClient{ WioCellular, PDP_CONTEXT_ID, SOCKET_ID };
 
 void setup(void) {
+  signal(SIGABRT, abortHandler);
   Serial.begin(115200);
   {
     const auto start = millis();
diff --git a/examples/soracom/soracom-uptime/soracom-uptime.ino b/examples/soracom/soracom-uptime/soracom-uptime.ino
index a7bc6cd..8d5b1f6 100644
--- a/examples/soracom/soracom-uptime/soracom-uptime.ino
+++ b/examples/soracom/soracom-uptime/soracom-uptime.ino
@@ -9,6 +9,7 @@
 //   http://librarymanager#ArduinoJson 7.0.4
 
 #include <Adafruit_TinyUSB.h>
+#include <csignal>
 #include <WioCellular.h>
 #include <ArduinoJson.h>
 
@@ -23,9 +24,19 @@ static constexpr int INTERVAL = 1000 * 60 * 5;      // [ms]
 static constexpr int POWER_ON_TIMEOUT = 1000 * 20;  // [ms]
 static constexpr int RECEIVE_TIMEOUT = 1000 * 10;   // [ms]
 
+static void abortHandler(int sig) {
+  while (true) {
+    ledOn(LED_BUILTIN);
+    delay(100);
+    ledOff(LED_BUILTIN);
+    delay(100);
+  }
+}
+
 static JsonDocument JsonDoc;
 
 void setup(void) {
+  signal(SIGABRT, abortHandler);
   Serial.begin(115200);
   {
     const auto start = millis();