HC-05 master all-in-one Bluetooth module HC-05 with base plate HC-05 Bluetooth module with base plate wireless

note!!! Do not attach power to the signal feet and burn it directly! The following situations are not product quality problems, which are caused by wrong wiring and are not guaranteed or returned: 1. After successful self-acceptance test, TXD or RXD is short-circuited to the ground in use 2, no power supply anti-reverse module back-to-back power caused damage 1.1 Common Sense (very important): TXD: sender, which is generally expressed as its own sender.The normal communication is connected to the RXD of another device. RXD: The receiving end, generally expressed as its own receiving end,The normal communication is connected to the TXD of another device. RXD of its own TXD connection device during normal communication! Self receiving: during normal communication, RXD is connected to the TXD of other devices, so if you want to receive the data sent by yourself, as the name suggests, that is, you want to receive the data sent by yourself, that is, your TXD is directly connected to RX