diff --git a/config/CLK.yaml b/config/CLK.yaml
index 90cd7ff3f61f2f7ac4f07d08a048708f1e8255b9..02bb6475215b10a056cf109e877265f6c4275fa3 100644
--- a/config/CLK.yaml
+++ b/config/CLK.yaml
@@ -8,7 +8,7 @@ drivers:
  - name: I2C_CLK
    type: i2c_dev #I2C devices
    parent: I2C
-   mask: CLK_I2C_OK
+   status: CLK_I2C_STATUS
  - name: SPIbb1 
    type: spibitbang2 #SPI bitbang via GPIO expander: CLK, SDI,SDO,CS
    parent: I2C_CLK
@@ -43,10 +43,10 @@ device_registers:
 
 
 variables:
-  - name: CLK_I2C_OK
+  - name: CLK_I2C_STATUS
     driver: I2C_CLK
-    rw:  variable #server RW variable, not linked to IO
-    dtype: boolean
+    rw:  ro #server RW variable, not linked to IO
+    dtype: uint8
 
   - name: CLK_Enable_PWR
     description: Power enabled
@@ -109,7 +109,7 @@ methods:
     driver: I2C_CLK
     debug: True
     instructions:   
-      - CLK_I2C_OK : 1
+      - CLK_I2C_STATUS : 0
       - RCU_IO1_GPIO1 : Update
       - IO1.CONF1: Update
       - CLK_Enable_PWR: Update
@@ -119,7 +119,7 @@ methods:
   - name: CLK_on  
     driver: I2C_CLK
     instructions:   
-     - CLK_I2C_OK : 1
+     - CLK_I2C_STATUS : 0
      - IO1.CONF1: 0x2C #0010 1100 PPS/PWR output, SCLK,CS,SDI
      - IO1.GPIO1: 0x42 #0100 0010 high:PWR enable, CS
      - CLK_Enable_PWR: Update
@@ -131,7 +131,7 @@ methods:
   - name: CLK_off  
     driver: I2C_CLK
     instructions:   
-     - CLK_I2C_OK : 1
+     - CLK_I2C_STATUS : 0
      - IO1.CONF1: 0x2C #0010 1100 PPS/PWR output, SCLK,CS,SDI
      - IO1.GPIO1: 0x00 #all low
      - CLK_Enable_PWR: Update
diff --git a/i2cserv/i2c_dev.py b/i2cserv/i2c_dev.py
index cd86b724f8493087e7a42bd8a401dda27fe511e6..2f73afaad2f28220342175219b4b1ad2d80c8de4 100644
--- a/i2cserv/i2c_dev.py
+++ b/i2cserv/i2c_dev.py
@@ -146,7 +146,7 @@ class i2c_dev(hwdev):
             return;
         for Vari in range(Step):
                 if not(mask[Vari]): continue
-                if not(self.I2Cmask[0]):
+                if not(self.I2Cmask[0]==0):
                   mask[Vari]=False;
                   continue;
                 i0=(Vari)*Step
@@ -156,13 +156,13 @@ class i2c_dev(hwdev):
                 bitoffset=GetField(var1,'bitoffset',Vari,0)
                 res=self.SetVarValue(devreg,width,bitoffset,data[i0:i1])
                 if not(res):
-                  self.I2Cmask[0]=False;
+                  self.I2Cmask[0]=1;
                   mask[Vari]=False;
                   continue;
                 value2=value1[i0:i1]
                 res=self.GetVarValue(devreg,width,bitoffset,value2)
                 if not(res):
-                  self.I2Cmask[0]=False;
+                  self.I2Cmask[0]=1;
                   mask[Vari]=False;
                   continue;
                 value1[i0:i1]=value2
@@ -181,7 +181,7 @@ class i2c_dev(hwdev):
             return;
         for Vari in range(Step):
                 if not(mask[Vari]): continue
-                if not(self.I2Cmask[0]):
+                if not(self.I2Cmask[0]==0):
                   mask[Vari]=False;
                   continue;
                 i0=( Vari)*Step
@@ -192,7 +192,7 @@ class i2c_dev(hwdev):
                 value2=value1[i0:i1]
                 res=self.GetVarValue(devreg,width,bitoffset,value2)
                 if not(res):
-                  self.I2Cmask[0]=False;
+                  self.I2Cmask[0]=1;
                   mask[Vari]=False;
                   continue;
                 value1[i0:i1]=value2
@@ -209,10 +209,10 @@ class i2c_dev(hwdev):
     def Setdevreg(self,devreg,value,mask=[]):
 #        if devreg.get('store'): logging.debug("Stored")
 #        print(devreg['store'])
-        if not(self.I2Cmask[0]): return False;
+        if not(self.I2Cmask[0]==0): return False;
         res=self.SetVarValue(devreg,8,0,value)
         if not(res):
-          self.I2Cmask[0]=False;
+          self.I2Cmask[0]=1;
           return False;
         if devreg.get('store'):
            devreg['storeval']=value[0];
@@ -220,10 +220,10 @@ class i2c_dev(hwdev):
 
     def Getdevreg(self,devreg,mask=[]):
         value=[0];
-        if not(self.I2Cmask[0]): return False;
+        if not(self.I2Cmask[0]==0): return False;
         res=self.GetVarValue(devreg,8,0,value)
         if not(res):
-          self.I2Cmask[0]=False;
+          self.I2Cmask[0]=1;
           return False;
         if devreg.get('store'):
                 devreg['storeval']=value[0];