I started working on a low energy microphone based on SPBTLE-1S. I bought a STEVAL-BLUEMIC-1 module and designed a custom PCB with only a digital MEMS microphone MP34DT05-A and removed the LSM6DSL. Other buttons and LEDs are the same as the evaluation board. I used the same sample code in the ST website(STSW-BLUEMIC-1) and commented out the INERTIAL_APP_Init() and MFT_Configuration() from the original code in the main.c file. Then modify the APP_Status PER_APP_Advertise function to stop advertising the Acc and Gyro. That is all the modification to the code. Evaluation board is working as expected with the modified code. But the custom design board is having trouble. I am here attaching the screenshot of the trouble wave form and the custom PCB design. Can you please help to identify the bug?
Thanks in advance.
