[IC]：DA14580

[Frequency]： 2.379~2.496GHz

[Protocol]：BLE 4.2

[Distance]：70m

[Interface]：UART

[Size]： 14*22*3mm

[Introduction]：E104-BT02 is a SMD 1mW (0dBm) wireless UART to BLE module with high cost performance, small size and embedded PCB antenna and operates at 2.4 GHz frequency band. Serial port (UART) can be used to receive and transmit Bluetooth data, which lowers the threshold to apply Bluetooth.