diff --git a/examples/OBDII_PIDs/OBDII_PIDs.ino b/examples/OBDII_PIDs/OBDII_PIDs.ino
index ff923a6..f3fa1e4 100644
--- a/examples/OBDII_PIDs/OBDII_PIDs.ino
+++ b/examples/OBDII_PIDs/OBDII_PIDs.ino
@@ -19,28 +19,32 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
 
 
 #ifdef CAN_2518FD
 #include "mcp2518fd_can.h"
-const int SPI_CS_PIN = 9;
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #endif
 
 #ifdef CAN_2515
 #include "mcp2515_can.h"
-const int SPI_CS_PIN = 9;
 mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
 #endif
 
@@ -82,11 +86,8 @@ void sendPid(unsigned char __pid) {
 void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
     while(!Serial){};
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#else
+
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
-#endif 
         SERIAL_PORT_MONITOR.println("CAN init fail, retry...");
         delay(100);
     }
diff --git a/examples/canbus-monitor/canbus-monitor.ino b/examples/canbus-monitor/canbus-monitor.ino
index 60af5be..44248eb 100644
--- a/examples/canbus-monitor/canbus-monitor.ino
+++ b/examples/canbus-monitor/canbus-monitor.ino
@@ -15,13 +15,13 @@
 #include "mcp_can.h"
 #include "can-serial.h"
 
-//#define CAN_2518FD
+// #define CAN_2518FD
 #define CAN_2515
 
 #ifdef CAN_2518FD
   #include "mcp2518fd_can.h"
   const int SPI_CS_PIN = BCM8;
-  const int CAN_INT_PIN = BCM25;
+  const int CAN_INT_PIN = BCM25;;
   mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #endif
 
@@ -30,8 +30,7 @@
   const int SPI_CS_PIN = 9;
   const int CAN_INT_PIN = 2;
   mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
-#endif                              // Set CS pin
-
+#endif
 
 
 void setup() {
diff --git a/examples/gpioRead/gpioRead.ino b/examples/gpioRead/gpioRead.ino
index 88895e4..d40cb82 100644
--- a/examples/gpioRead/gpioRead.ino
+++ b/examples/gpioRead/gpioRead.ino
@@ -7,19 +7,24 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
 
-#define SPI_CS_PIN 9
 
 #ifdef CAN_2518FD
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
@@ -31,13 +36,8 @@ mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
 
 void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#endif
-#ifdef CAN_2515
+
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {
-#endif
-   
         SERIAL_PORT_MONITOR.println("CAN init failed, retry...");
         delay(100);
     }
diff --git a/examples/gpioWrite/gpioWrite.ino b/examples/gpioWrite/gpioWrite.ino
index 35dae4b..5751169 100644
--- a/examples/gpioWrite/gpioWrite.ino
+++ b/examples/gpioWrite/gpioWrite.ino
@@ -7,19 +7,24 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
 
-#define SPI_CS_PIN 9
 
 #ifdef CAN_2518FD
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
@@ -33,12 +38,7 @@ mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
 void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
 
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#endif
-#ifdef CAN_2515
-    while (CAN_OK != CAN.begin(CAN_500KBPS)) {
-#endif         // init can bus : baudrate = 500k
+    while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
         SERIAL_PORT_MONITOR.println("CAN init failed, retry");
         delay(100);
     }
diff --git a/examples/receive_Blink/receive_Blink.ino b/examples/receive_Blink/receive_Blink.ino
index 8241ecc..66be957 100644
--- a/examples/receive_Blink/receive_Blink.ino
+++ b/examples/receive_Blink/receive_Blink.ino
@@ -7,31 +7,34 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
+
 
 #ifdef CAN_2518FD
 #include "mcp2518fd_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #endif
 
 #ifdef CAN_2515
 #include "mcp2515_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
-#endif                              // Set CS pin
+#endif
 
 const int LED        = 8;
 boolean ledON        = 1;
@@ -40,11 +43,7 @@ void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
     pinMode(LED, OUTPUT);
 
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#else
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
-#endif 
         SERIAL_PORT_MONITOR.println("CAN init fail, retry...");
         delay(100);
     }
diff --git a/examples/receive_check/receive_check.ino b/examples/receive_check/receive_check.ino
index a955b7b..304ff33 100644
--- a/examples/receive_check/receive_check.ino
+++ b/examples/receive_check/receive_check.ino
@@ -6,40 +6,39 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
+
 
 #ifdef CAN_2518FD
 #include "mcp2518fd_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #endif
 
 #ifdef CAN_2515
 #include "mcp2515_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
 #endif                           
 
 void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
 
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#else
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
-#endif
         SERIAL_PORT_MONITOR.println("CAN init fail, retry...");
         delay(100);
     }
diff --git a/examples/receive_interrupt/receive_interrupt.ino b/examples/receive_interrupt/receive_interrupt.ino
index fb7da83..c65ad16 100644
--- a/examples/receive_interrupt/receive_interrupt.ino
+++ b/examples/receive_interrupt/receive_interrupt.ino
@@ -7,31 +7,34 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
+
 
 #ifdef CAN_2518FD
 #include "mcp2518fd_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #endif
 
 #ifdef CAN_2515
 #include "mcp2515_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
-#endif                              // Set CS pin
+#endif
 
 
 unsigned char flagRecv = 0;
@@ -45,11 +48,7 @@ void setup() {
         ; // wait for serial port to connect. Needed for native USB port only
     }
     attachInterrupt(digitalPinToInterrupt(CAN_INT_PIN), MCP2515_ISR, FALLING); // start interrupt
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#else
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
-#endif            // init can bus : baudrate = 500k
         SERIAL_PORT_MONITOR.println("CAN init fail, retry...");
         delay(100);
     }
diff --git a/examples/receive_monitor/receive_monitor.ino b/examples/receive_monitor/receive_monitor.ino
index 2f199bc..e0f5d68 100644
--- a/examples/receive_monitor/receive_monitor.ino
+++ b/examples/receive_monitor/receive_monitor.ino
@@ -9,42 +9,42 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
+
 
 #ifdef CAN_2518FD
 #include "mcp2518fd_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #define MAX_DATA_SIZE 64
 #endif
 
 #ifdef CAN_2515
 #include "mcp2515_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
 #define MAX_DATA_SIZE 8
 #endif
 
 void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
+    while (!SERIAL_PORT_MONITOR) {}
 
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#else
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
-#endif
         SERIAL_PORT_MONITOR.println(F("CAN init fail, retry..."));
         delay(100);
     }
@@ -62,7 +62,7 @@ void loop() {
         return;
     }
 
-    char prbuf[0x40];
+    char prbuf[32 + MAX_DATA_SIZE * 3];
     int i, n;
 
     unsigned long t = millis();
diff --git a/examples/recv_sd/recv_sd.ino b/examples/recv_sd/recv_sd.ino
index b791cba..811b078 100644
--- a/examples/recv_sd/recv_sd.ino
+++ b/examples/recv_sd/recv_sd.ino
@@ -11,31 +11,34 @@ File myFile;
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
+
 
 #ifdef CAN_2518FD
 #include "mcp2518fd_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #endif
 
 #ifdef CAN_2515
 #include "mcp2515_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
-#endif                              // Set CS pin
+#endif
 
 unsigned char flagRecv = 0;
 unsigned char len = 0;
@@ -45,11 +48,7 @@ char str[20];
 void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
     attachInterrupt(digitalPinToInterrupt(CAN_INT_PIN), MCP2515_ISR, FALLING); // start interrupt
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#else
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
-#endif  
         SERIAL_PORT_MONITOR.println("CAN init fail, retry...");
         delay(100);
     }
diff --git a/examples/send/send.ino b/examples/send/send.ino
index 186c129..b44ae14 100644
--- a/examples/send/send.ino
+++ b/examples/send/send.ino
@@ -7,41 +7,40 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
+
 
 #ifdef CAN_2518FD
 #include "mcp2518fd_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #endif
 
 #ifdef CAN_2515
 #include "mcp2515_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
-#endif                              // Set CS pin
+#endif
 
 void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
     while(!Serial){};
 
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#else
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
-#endif        
         SERIAL_PORT_MONITOR.println("CAN init fail, retry...");
         delay(100);
     }
diff --git a/examples/send_Blink/send_Blink.ino b/examples/send_Blink/send_Blink.ino
index 78377ee..40f2902 100644
--- a/examples/send_Blink/send_Blink.ino
+++ b/examples/send_Blink/send_Blink.ino
@@ -4,31 +4,34 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
+
 
 #ifdef CAN_2518FD
 #include "mcp2518fd_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #endif
 
 #ifdef CAN_2515
 #include "mcp2515_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
-#endif                              // Set CS pin
+#endif
 
 const int ledHIGH    = 1;
 const int ledLOW     = 0;
@@ -37,11 +40,7 @@ const int ledLOW     = 0;
 void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
 
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#else
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
-#endif
         SERIAL_PORT_MONITOR.println("CAN init fail, retry...");
         delay(100);
     }
diff --git a/examples/send_random/send_random.ino b/examples/send_random/send_random.ino
index 8878e85..45ed51d 100644
--- a/examples/send_random/send_random.ino
+++ b/examples/send_random/send_random.ino
@@ -9,43 +9,42 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
+
 
 #ifdef CAN_2518FD
 #include "mcp2518fd_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #define MAX_DATA_SIZE 64
 #endif
 
 #ifdef CAN_2515
 #include "mcp2515_can.h"
-const int SPI_CS_PIN = 9;
-const int CAN_INT_PIN = 2;
 mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
 #define MAX_DATA_SIZE 8
 #endif
 
 void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
-    while(!Serial){};
+    while(!SERIAL_PORT_MONITOR){}
 
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#else
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
-#endif
         SERIAL_PORT_MONITOR.println("CAN init fail, retry...");
         delay(100);
     }
@@ -86,7 +85,8 @@ void loop() {
     CAN.sendMsgBuf(id, bool(type & 0x1),
                        bool(type & 0x2),
                        len, cdata);
-    char prbuf[0x40];
+
+    char prbuf[32 + MAX_DATA_SIZE * 3];
     int n;
 
     /* Displayed type:
diff --git a/examples/send_sleep/send_sleep.ino b/examples/send_sleep/send_sleep.ino
index 04c9b28..ae1f0ef 100644
--- a/examples/send_sleep/send_sleep.ino
+++ b/examples/send_sleep/send_sleep.ino
@@ -1,4 +1,6 @@
 // demo: CAN Sleep Example - send
+// *** only works on AVR + MCP2515 platform
+// 
 // by Kai, based on the send example by loovee and the additions from Zak Kemble (https://github.com/coryjfowler/MCP_CAN_lib/pull/10/files)
 //
 // See receive_sleep example for additional notes.
diff --git a/examples/set_mask_filter_recv/set_mask_filter_recv.ino b/examples/set_mask_filter_recv/set_mask_filter_recv.ino
index ead31dd..69c5181 100644
--- a/examples/set_mask_filter_recv/set_mask_filter_recv.ino
+++ b/examples/set_mask_filter_recv/set_mask_filter_recv.ino
@@ -8,31 +8,35 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
+
 
 #ifdef CAN_2518FD
 #include "mcp2518fd_can.h"
-const int SPI_CS_PIN = 9;
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #endif
 
 #ifdef CAN_2515
 #include "mcp2515_can.h"
-const int SPI_CS_PIN = 9;
 mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
 #endif                              
 
-const byte interruptPin = 2;
 unsigned char flagRecv = 0;
 unsigned char len = 0;
 unsigned char buf[8];
@@ -41,12 +45,8 @@ char str[20];
 void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
     while(!Serial){};
-    attachInterrupt(digitalPinToInterrupt(interruptPin), MCP2515_ISR, FALLING); // start interrupt
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#else
+    attachInterrupt(digitalPinToInterrupt(CAN_INT_PIN), MCP2515_ISR, FALLING); // start interrupt
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
-#endif          
         SERIAL_PORT_MONITOR.println("CAN init fail, retry...");
         delay(100);
     }
@@ -69,7 +69,6 @@ void setup() {
     CAN.init_Filt(3, 0, 0x07);                          // there are 6 filter in mcp2515
     CAN.init_Filt(4, 0, 0x08);                          // there are 6 filter in mcp2515
     CAN.init_Filt(5, 0, 0x09);                          // there are 6 filter in mcp2515
-
 }
 
 void MCP2515_ISR() {
@@ -91,7 +90,6 @@ void loop() {
             SERIAL_PORT_MONITOR.print("\t");
         }
         SERIAL_PORT_MONITOR.println();
-
     }
 }
 
diff --git a/examples/set_mask_filter_send/set_mask_filter_send.ino b/examples/set_mask_filter_send/set_mask_filter_send.ino
index 6c98ec1..bb1b294 100644
--- a/examples/set_mask_filter_send/set_mask_filter_send.ino
+++ b/examples/set_mask_filter_send/set_mask_filter_send.ino
@@ -5,27 +5,32 @@
 #define CAN_2515
 // #define CAN_2518FD
 
-// the cs pin of the version after v1.1 is default to D9
-// v0.9b and v1.0 is default D10
-
 // Set SPI CS Pin according to your hardware
+
+#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)
 // For Wio Terminal w/ MCP2518FD RPi Hat：
 // Channel 0 SPI_CS Pin: BCM 8
 // Channel 1 SPI_CS Pin: BCM 7
 // Interupt Pin: BCM25
-// *****************************************
+const int SPI_CS_PIN  = BCM8;
+const int CAN_INT_PIN = BCM25;
+#else
+
 // For Arduino MCP2515 Hat:
-// SPI_CS Pin: D9
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = 9;
+const int CAN_INT_PIN = 2;
+#endif
+
 
 #ifdef CAN_2518FD
 #include "mcp2518fd_can.h"
-const int SPI_CS_PIN = 9;
 mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
 #endif
 
 #ifdef CAN_2515
 #include "mcp2515_can.h"
-const int SPI_CS_PIN = 9;
 mcp2515_can CAN(SPI_CS_PIN); // Set CS pin
 #endif  
                          
@@ -34,11 +39,7 @@ void setup() {
     SERIAL_PORT_MONITOR.begin(115200);
     while(!Serial){};
     
-#ifdef CAN_2518FD
-    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k
-#else
     while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k
-#endif 
         SERIAL_PORT_MONITOR.println("CAN init fail, retry...");
         delay(100);
     }
diff --git a/src/mcp2518fd_can_dfs.h b/src/mcp2518fd_can_dfs.h
index b249d6a..de37af7 100644
--- a/src/mcp2518fd_can_dfs.h
+++ b/src/mcp2518fd_can_dfs.h
@@ -1607,6 +1607,32 @@ static const uint32_t canFilterObjectResetValues[] = {0x00000000, 0x00000000};
 static const uint32_t mcp25xxfdControlResetValues[] = {
     0x00000460, 0x00000003, 0x00000000, 0x00000000, 0x00000000};
 #endif
+
+
+
+// compatible layer for MCP2515
+typedef enum {
+    CAN_NOBPS,
+    CAN_5KBPS,
+    CAN_10KBPS,
+    CAN_20KBPS,
+    CAN_25KBPS,
+    CAN_31K25BPS,
+    CAN_33KBPS  ,
+    CAN_40KBPS  ,
+    CAN_50KBPS  ,
+    CAN_80KBPS  ,
+    CAN_83K3BPS ,
+    CAN_95KBPS  ,
+    CAN_100KBPS ,
+    CAN_125KBPS = CAN_125K_500K,
+    CAN_200KBPS ,
+    CAN_250KBPS = CAN_250K_500K,
+    CAN_500KBPS = CAN_500K_1M,
+    CAN_666KBPS ,
+    CAN_1000KBPS = CAN_1000K_4M,
+} MCP2515_BITTIME_SETUP;
+
 #ifdef __cplusplus // Provide C++ Compatibility
 }
 #endif