diff --git a/ohmpi/hardware_components/mb_2023_0_X.py b/ohmpi/hardware_components/mb_2023_0_X.py
index 288f5502f8bb8a9596a5e916b35c1ff16be4a966..ab23d29c13f7e6cd61803e283ab4dcb8712bdd55 100644
--- a/ohmpi/hardware_components/mb_2023_0_X.py
+++ b/ohmpi/hardware_components/mb_2023_0_X.py
@@ -156,7 +156,6 @@ class Tx(TxAbstract):
 
     @polarity.setter
     def polarity(self, polarity):
-        print(f'mcp address : {self.mcp_board._device.device_address}')
         assert polarity in [-1, 0, 1]
         self._polarity = polarity
         if polarity == 1:
diff --git a/ohmpi/hardware_components/mb_2024_0_2.py b/ohmpi/hardware_components/mb_2024_0_2.py
index 7d22b5791d6ce9be4a8cb7c96857344f6ba96371..f318c54df9b0804aa73900aa0cd351da0e0b94c9 100644
--- a/ohmpi/hardware_components/mb_2024_0_2.py
+++ b/ohmpi/hardware_components/mb_2024_0_2.py
@@ -64,7 +64,7 @@ class Tx(Tx_mb_2023):
     def __init__(self, **kwargs):
         super().__init__(**kwargs)
         # I2C connexion to MCP23008, for current injection
-        self.mcp_board = MCP23008(self.connection, address=kwargs['mcp_address'])
+        # self.mcp_board = MCP23008(self.connection, address=kwargs['mcp_address'])
 
         # Initialize LEDs
         self.pin4 = self.mcp_board.get_pin(4)  # Ohmpi_run
@@ -81,6 +81,7 @@ class Tx(Tx_mb_2023):
         Tx_mb_2023.inject(self, polarity=polarity, injection_duration=injection_duration)
         self.pin6.value = False
 
+
 class Rx(Rx_mb_2023):
     def __init__(self, **kwargs):
         super().__init__(**kwargs)