问题
Can we change passkey (4 digit pin) in Bluetooth Low Energy? How to change it programmatically ? FYI : I using sensortag cc2650 and https://github.com/don/cordova-plugin-ble-central
回答1:
No, it's generated by the internal bluetooth stack. By the way it is 6 digits, not 4. You shouldn't change it anyway since it should be a randomly generated code. The standard says:
If the IO capabilities of a device are DisplayOnly or if Table 2.8 defines that the device displays the passkey, then that device shall display a randomly generated passkey value between 000,000 and 999,999.
If you don't need a code you should use the "Just Works" pairing method.
Why would you like to change the code?
来源：https://stackoverflow.com/questions/41999532/how-to-change-ble-pin-programmatically