You set BlueSnap M6A baudrate on the BlueSnap M6A Wireless RS-232 (DB9) Adapter quickly and easily. Simply launch the yACK BLE app, connect to the M6A then you select the menu option to change baudrate. Then tap the desired baudrate from the list, and the app changes the baudrate and reboots the BlueSnap M6A. Also note, your battery M6A will power off after reset. Following shows the BlueSnap M6A baudrate selection dialog on yACK BLE on iOS running on iPhone 13.
When you set BlueSnap M6A baudrate on yACK BLE Android, you pick the menu option, then tap the drop-down for the list of baudrates.