[Chip Solution]：-

[Communication Interface]：UART

[Operating Frequency]：2.400-2.480 GHz

[Bluetooth Protocol]：V4.2 + V3.0 SPP

[Communication diatance]：40m

[Size]：16*13mm

[Introduction]：The E104-BT40 Bluetooth module is a serial-to-dual-mode Bluetooth slave module based on Bluetooth 4.2+3.0, supporting Bluetooth Low Energy (BLE) and Classic Bluetooth SPP Profile. It can freely switch between BLE and Classic Bluetooth, operating in the 2.4GHz frequency band. Parameters are set using common AT commands, making operation simple and fast.