CommentStreams:E55ef79c7ef84ffc84e77980d48f359c

Hello,

1/ X728 V2.1 add a buzzer controlled by CPIO 20; please plug in the power supply to the X728 without raspberry pi , and turn it on to check if it is still calling; if not, please check GPIO 20 is occupied.

Raspberry Pi Tutorial: How to Use a Buzzer: please refer to :X728-Software#FAQ