This product uses CSR dual mode Bluetooth chip,with the ARM architecture single chip which supports AT instructions, Users can develop flexibly according to the serial baud rate, equipment name, pairing password.
BT Version: Bluetooth Specification V4.0 & BLE
UART send and receive max bytes is 512
Other device to module in SPP mode: 90 Bytes per packet
Other device to module in BLE mode: 20 Bytes per packet
Two data transmission mode, balance mode and high speed mode
Working frequency: 2.4GHz ISM band
Modulation method: GFSK(Gaussian Frequency Shift Keying)