diff --git a/README.md b/README.md
index 65b88e6..6cac20e 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,8 @@ Several things could be the cause of it:
 
 After modifying the oximeter2_init function and changing the EXAMPLE_I2C_MASTER's MSDAT value to 0x46(the correct value), the value goes back to the previous wrong value after `I2C_MasterTransferNonBlocking` in `i2c_master_write`.
 
+To be more precise, 0x46 is changed to 200 after `I2C_EnableInterrupts(base, (uint32_t)kI2C_MasterIrqFlags)` in function `I2C_MasterTransferNonBlocking`.
+
 Another observation is that the value `final_result` read in function oximeter2_logs_results is always 92, regardless if the click sensor oximeter2 is connected to the board or not.