Devices that require password pairing cannot be paired successfully.

[tenutos]

I can successfully pair with the correct password 0000 in the Bluetooth settings of Android.
But it cannot be paired with rx_ble.
Except for this, other ble devices can be paired normally.

[yiguozhen0510]

可以尝试一下这种方式：

//发现服务
Future discoverChars() async {
final value = await RxBle.discoverChars(deviceId);
if (!mounted) return null;
setState(() {
chars = value;
});
//发现服务之后，设置连接密码
// RxBle.observeChar(deviceId, '0783b03e-8535-b5a0-7140-a304d2495cb8');

RxBle.writeChar(deviceId, '0783b03e-8535-b5a0-7140-a304d2495cba', RxBle.stringToChar('AB12'));
RxBle.observeChar(deviceId, '0783b03e-8535-b5a0-7140-a304d2495cb8')
print('发现服务之后，设置连接密码');

return JsonEncoder.withIndent(" " * 2).convert(chars);
}