e_ganochkin The FSC-BT986's GPIO33 serves as the default connection indicator and will set to high upon successful pairing.
For custom control of PIN 9/10, enable them first using the commandAT+PIOCFG=1. Configuration details are in the FSC-BT986 Programming Guide
Regarding your request to read and write the configuration of other GPIO lines: this advanced functionality is not available in the standard firmware. If your project requires custom control over specific GPIO pins, we can implement this through a custom firmware solution.
Please contact our sales team to discuss your specific requirements, and we will be glad to explore a tailored solution for you.
