diff --git a/README.md b/README.md
index 6cac20e..abb4784 100644
--- a/README.md
+++ b/README.md
@@ -12,13 +12,17 @@ Several things could be the cause of it:
   - `extern` not done properly maybe? maybe I should use `static`?
 - `EXAMPLE_I2C_MASTER` incorrect
 
-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`.
+After modifying the oximeter2_init function and changing the EXAMPLE_I2C_MASTER's MSTDAT 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.
 
 
+---
+
+The I2C_MasterTransferNonBlocking in function i2c_master_write_then_read would return kStatus_I2C_Busy because the transaction is in progress. This is related to the problem of being stuck in `while(!g_MasterCompletionFlag)` (for the moment this while loop is commented out).
+
 # 2022-09-05
 
 ##### yu-capteurs branch in function "oximeter2_read_data" optimisation