diff --git a/src/ACAN2517FD.cpp b/src/ACAN2517FD.cpp
index 0ded4da..272ecde 100644
--- a/src/ACAN2517FD.cpp
+++ b/src/ACAN2517FD.cpp
@@ -171,7 +171,7 @@ static uint16_t u16FromBufferAtIndex (uint8_t ioBuffer [], const uint8_t inIndex
 
 //----------------------------------------------------------------------------------------------------------------------
 
-ACAN2517FD::ACAN2517FD (const CanCmn::eCanBusId busId,
+ACAN2517FD::ACAN2517FD (const CanCmn::eCanBusFdId busId,
                         const uint8_t inCS, // CS input of MCP2517FD
                         SPIClass & inSPI, // Hardware SPI object
                         const uint8_t inINT) : // INT output of MCP2517FD
@@ -351,7 +351,7 @@ uint32_t ACAN2517FD::begin (const ACAN2517FDSettings & inSettings,
     }
   }
 //----------------------------------- Set full speed clock
-  mSPISettings = SPISettings (inSettings.sysClock () / 2, MSBFIRST, SPI_MODE0) ;
+  mSPISettings = SPISettings (8000UL*1000, MSBFIRST, SPI_MODE0) ; 
 //----------------------------------- Checking SPI connection is on (with a full speed clock)
 //    We write and read back 2517 RAM at address 0x400
   for (uint32_t i=1 ; (i != 0) && (errorCode == 0) ; i <<= 1) {
@@ -1260,3 +1260,18 @@ uint32_t ACAN2517FD::diagInfos (const int inIndex) { // thanks to Flole998 and t
 }
 
 //----------------------------------------------------------------------------------------------------------------------
+//Gpio
+    void ACAN2517FD::ledRedToggle() { //rxobfOn; avaible on CAN1,2
+      if (readRegister8(IOCON_REGISTER) & 0x01) {
+        ledRedOn();
+      }
+      else{
+        ledRedOff();
+      }
+    }
+  void ACAN2517FD::ledRedOn() {
+    writeRegister8 (IOCON_REGISTER, 0) ; // write 1 to gpio0
+  }
+  void ACAN2517FD::ledRedOff() {
+    writeRegister8 (IOCON_REGISTER, 1) ; // write 0 to gpio0
+  }
\ No newline at end of file
diff --git a/src/ACAN2517FD.h b/src/ACAN2517FD.h
index 2cff178..cf0583d 100644
--- a/src/ACAN2517FD.h
+++ b/src/ACAN2517FD.h
@@ -27,7 +27,7 @@ class ACAN2517FD {
 //   CONSTRUCTOR
 //······················································································································
 
-  public: ACAN2517FD (const CanCmn::eCanBusId busId,
+  public: ACAN2517FD (const CanCmn::eCanBusFdId busId,
                       const uint8_t inCS, // CS input of MCP2517FD
                       SPIClass & inSPI, // Hardware SPI object
                       const uint8_t inINT) ; // INT output of MCP2517FD
@@ -137,7 +137,7 @@ class ACAN2517FD {
   #endif
   private: SPISettings mSPISettings ;
   private: SPIClass & mSPI ;
-  private: CanCmn::eCanBusId mBusId;
+  private: CanCmn::eCanBusFdId mBusId;
   private: const uint8_t mCS ;
   private: const uint8_t mINT ;
   private: bool mUsesTXQ ;
@@ -173,6 +173,11 @@ class ACAN2517FD {
   public: uint32_t driverTransmitBufferCount (void) const { return mDriverTransmitBuffer.count () ; }
 
   public: uint32_t driverTransmitBufferPeakCount (void) const { return mDriverTransmitBuffer.peakCount () ; }
+// Gpio
+  public:
+    void ledRedToggle();
+    void ledRedOn();
+    void ledRedOff();
 
 //······················································································································
 //    Private methods
@@ -308,13 +313,7 @@ class ACAN2517FD {
     }
     private: inline void assertCS() {
       switch (mBusId) {
-        case CanCmn::eCanBusId::eCan0:
-          digitalWrite(mCS, LOW);
-          break;
-        case CanCmn::eCanBusId::eCan1:
-          _Mux.can1Cs();
-          break;
-        case CanCmn::eCanBusId::eCan2:
+        case CanCmn::eCanBusFdId::eCanFd2:
           _Mux.can2Cs();
           break;
     
@@ -324,13 +323,7 @@ class ACAN2517FD {
     }   
     private: inline void deassertCS() {
       switch (mBusId) {
-        case CanCmn::eCanBusId::eCan0:
-          digitalWrite(mCS, HIGH);
-          break;
-        case CanCmn::eCanBusId::eCan1:
-          _Mux.can1UnCs();
-          break;
-        case CanCmn::eCanBusId::eCan2:
+        case CanCmn::eCanBusFdId::eCanFd2:
           _Mux.can2UnCs();
           break;
         default: