1. For Bluetooth antenna, please refer to the test board provided by us and copy it directly

2. Bluetooth is a very mature technology, so don't worry about the poor performance or short distance of PCB.

Because the RF inside the chip has been optimized very well

3. If an external antenna is needed, you can also refer to the module given by us. If the ground is locally grounded, the antenna is locally grounded

4. The line width with unclear identification can be handled flexibly.