RDA5851S 2.1 Bluetooth audio module / support AT command SPP data transmission high-quality speaker amplifier DIY Master chip RDA5851S Bluetooth stereo audio Bluetooth headset module can call AT commands control the audio and SPP SPP can transfer data at the same time absolutely transparent transmission only section can be modified online Bluetooth name and password Read more about RDA5851S 2.1 Bluetooth audio module / support AT command SPP data transmission high-quality speaker amplifier DIY[…]