BT485 serial Bluetooth adapter can replace the traditional -485 cable within a range of about 100 meters, convert -485 connection into a Bluetooth connection, and thus realize wireless -485 communication. BT485 can be set as a Bluetooth master or slave by an Android app, and be used in a pair with one slave and one master, or in a network with one slave and multiple . The slave is connected to -485 master device, and the master is connected to -485 slave device, a BT485 slave can connect to up to 20 at the same time, and further connect up to 255 -485 slave devices through the BT485 . Adapt to -485 physical layer, support Modbus RTU and ASCII protocols. Simpler and more flexible networking than traditional wired -485 connection. The default Bluetooth role is slave, and can be set as a Bluetooth master. A Bluetooth slave can be connected to up to 20 Bluetooth at the same time. Bluetooth pairing encryption can enhance the security of wireless communication. Fast and large data transfer ability, the max -485 baud rate is up to 921600 bps. 10dBm transmiting power, communication distance up to 100 meters in open area. Built-in Watchdog, long-term reliable and stable working. An Android app is supplied to set the adapter, without sending AT commands. 5V~36V wide DC power range, meet almost all power voltage of -485 devices. Serial TXD/RXD indicator can display the data activity on -485 serial port. Specifications • Bluetooth protocol: Version 5.1 BLE • Selectable -485 baud rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 • TX power: 10dBm • RX sensitivity: -98dBm • Max wireless communication distance: 100 meters (line of sight) • Default -485 communication settings: 115200, N, 8, 1 • Typical working current: 5 mA • Working Temperature Range: -20℃~85℃ Color: White Material: plastic Package Contents: 1 * RS485 Bluetooth Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.