Jerry's power on automatic pairing [chapter]

If there are paired headphones , Connect the headset back first . If not, a pairing message is initiated 、 Send a message back to the mobile phone . remarks ： This way of pairing , If the production line starts multiple devices , Will also pair with each other . But the advantage is , When starting up, the prototype is first connected back The equipment （ The headset ）, Re initiate pairing .