diff --git a/lib/ETH/WS_RTC.cpp b/lib/ETH/WS_RTC.cpp
index 77ee290..8e37f11 100644
--- a/lib/ETH/WS_RTC.cpp
+++ b/lib/ETH/WS_RTC.cpp
@@ -79,7 +79,7 @@ void TimerEvent_handling(Timing_RTC event){
     } 
     printf("\r\nCHx Closs  : ");         
     for (j = 0; j < Relay_Number_MAX; j++) {
-      if(*(&(event.Relay_CH1)+j) == STATE_Closs)                          
+      if(*(&(event.Relay_CH1)+j) == STATE_Close)                          
         printf("CH%d    ", j+1); 
     }
     if(Retain_channels){
@@ -233,7 +233,7 @@ void TimerEvent_CHxn_Set(datetime_t time,Status_adjustment *Relay_n, Repetition_
     for (int i = 0; i < Relay_Number_MAX; i++) {
       if(Relay_n[i] == STATE_Open)
         printf("Open     ");
-      else if(Relay_n[i] == STATE_Closs)
+      else if(Relay_n[i] == STATE_Close)
         printf("Closs    ");
       else if(Relay_n[i] == STATE_Retain)
         printf("Retain   ");
@@ -253,7 +253,7 @@ void TimerEvent_CHxn_Set(datetime_t time,Status_adjustment *Relay_n, Repetition_
     for (int i = 0; i < Relay_Number_MAX; i++) {
       if (Relay_n[i] == STATE_Open)
         len += snprintf(Event_content + len, sizeof(Event_content) - len, "Open&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;");
-      else if(Relay_n[i] == STATE_Closs)
+      else if(Relay_n[i] == STATE_Close)
         len += snprintf(Event_content + len, sizeof(Event_content) - len, "Closs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;");
       else if(Relay_n[i] == STATE_Retain)
         len += snprintf(Event_content + len, sizeof(Event_content) - len, "Retain&nbsp;&nbsp;&nbsp;");
@@ -312,7 +312,7 @@ void TimerEvent_printf(Timing_RTC event){
     } 
     printf("\r\nCHx Closs  : ");         
     for (j = 0; j < Relay_Number_MAX; j++) {
-      if(open[j] == STATE_Closs)                          
+      if(open[j] == STATE_Close)                          
         printf("CH%d    ", j+1); 
     }
     printf("\r\nCHx Retain : ");         
diff --git a/lib/GPIO/WS_Relay.cpp b/lib/GPIO/WS_Relay.cpp
index 31a92e4..1f8ab07 100644
--- a/lib/GPIO/WS_Relay.cpp
+++ b/lib/GPIO/WS_Relay.cpp
@@ -11,7 +11,7 @@ bool Relay_Open(uint8_t CHx)
   }
   return 1;
 }
-bool Relay_Closs(uint8_t CHx)
+bool Relay_Close(uint8_t CHx)
 {
   if(!Set_EXIO(CHx, false)){
     printf("Failed to Closs CH%d!!!\r\n", CHx);
@@ -35,7 +35,7 @@ bool Relay_CHx(uint8_t CHx, bool State)
   if(State)
     result = Relay_Open(CHx);
   else
-    result = Relay_Closs(CHx);
+    result = Relay_Close(CHx);
   if(!result)
     Failure_Flag = 1;
   return result;
@@ -233,12 +233,12 @@ void Relay_Immediate_CHxn(Status_adjustment * Relay_n, uint8_t Mode_Flag)
   else if(Mode_Flag == RTC_Mode)
     printf("RTC Data :\r\n");            
   for (int i = 0; i < 8; i++) {
-    if(Relay_n[i] == STATE_Open || Relay_n[i] == STATE_Closs){
+    if(Relay_n[i] == STATE_Open || Relay_n[i] == STATE_Close){
       Relay_Flag[i] = (bool)Relay_n[i];
       ret = Relay_CHx(i+1,Relay_n[i]);  
       if(Relay_n[i] == STATE_Open)
         printf("|***  Relay CH%d on  ***|\r\n",i+1);
-      else if(Relay_n[i] == STATE_Closs)
+      else if(Relay_n[i] == STATE_Close)
         printf("|***  Relay CH%d off ***|\r\n",i+1);
     }
   }
diff --git a/lib/GPIO/WS_Relay.h b/lib/GPIO/WS_Relay.h
index bbf95b0..ac8b742 100644
--- a/lib/GPIO/WS_Relay.h
+++ b/lib/GPIO/WS_Relay.h
@@ -36,7 +36,7 @@
 #define RTC_Mode          6
 
 typedef enum {
-  STATE_Closs = 0,    // Closs Relay
+  STATE_Close = 0,    // Closs Relay
   STATE_Open = 1,     // Open Relay
   STATE_Retain = 2,   // Stay in place
 } Status_adjustment;
@@ -44,7 +44,7 @@ typedef enum {
 extern bool Relay_Flag[8];  // Relay current status flag
 
 void Relay_Init(void);
-bool Relay_Closs(uint8_t CHx);
+bool Relay_Close(uint8_t CHx);
 bool Relay_Open(uint8_t CHx);
 bool Relay_CHx_Toggle(uint8_t CHx);
 bool Relay_CHx(uint8_t CHx, bool State);
diff --git a/lib/GPIO/WS_TCA9554PWR.cpp b/lib/GPIO/WS_TCA9554PWR.cpp
index ffbfc22..e9ade32 100644
--- a/lib/GPIO/WS_TCA9554PWR.cpp
+++ b/lib/GPIO/WS_TCA9554PWR.cpp
@@ -11,7 +11,7 @@ namespace drivers
 
   const bool TCA9554PWR::writeRegister(const uint8_t reg, const uint8_t val)
   {
-    if (m_i2c.Write(m_address, reg, {val}))
+    if (m_i2c.write(m_address, reg, {val}))
       return true;
     log_e("Unable to write register: reg[%d], val[%d] ", reg, val);
     return false;
@@ -20,7 +20,7 @@ namespace drivers
   const bool TCA9554PWR::readRegister(const uint8_t reg, uint8_t &val)
   {
     std::vector<uint8_t> data;
-    if (m_i2c.Read(m_address, reg, 1, data))
+    if (m_i2c.read(m_address, reg, 1, data))
     {
       val = data.back();
       return true;
diff --git a/lib/I2C/I2C_Driver.cpp b/lib/I2C/I2C_Driver.cpp
index 837f4db..f4e16b5 100644
--- a/lib/I2C/I2C_Driver.cpp
+++ b/lib/I2C/I2C_Driver.cpp
@@ -15,7 +15,7 @@ namespace drivers
     isInitialized = true;
   }
 
-  const bool I2C::Read(const uint8_t deviceAddr, const uint8_t deviceReg, const uint8_t len, std::vector<uint8_t> &data)
+  const bool I2C::read(const uint8_t deviceAddr, const uint8_t deviceReg, const uint8_t len, std::vector<uint8_t> &data)
   {
     busy.try_lock();
     Wire.beginTransmission(deviceAddr);
@@ -49,7 +49,7 @@ namespace drivers
     return true;
   }
 
-  const bool I2C::Write(const uint8_t deviceAddr, const uint8_t deviceReg, const std::vector<uint8_t> &data)
+  const bool I2C::write(const uint8_t deviceAddr, const uint8_t deviceReg, const std::vector<uint8_t> &data)
   {
     busy.lock();
     Wire.beginTransmission(deviceAddr);
diff --git a/lib/I2C/I2C_Driver.h b/lib/I2C/I2C_Driver.h
index f32a870..cb53f3c 100644
--- a/lib/I2C/I2C_Driver.h
+++ b/lib/I2C/I2C_Driver.h
@@ -19,8 +19,8 @@ namespace drivers
         I2C(void);
         ~I2C(void);
 
-        const bool Read(const uint8_t deviceAddr, const uint8_t deviceReg, const uint8_t len, std::vector<uint8_t> &data);
-        const bool Write(const uint8_t deviceAddr, const uint8_t deviceReg, const std::vector<uint8_t> &data);
+        const bool read(const uint8_t deviceAddr, const uint8_t deviceReg, const uint8_t len, std::vector<uint8_t> &data);
+        const bool write(const uint8_t deviceAddr, const uint8_t deviceReg, const std::vector<uint8_t> &data);
     };
 
 }