HC-08 Bluetooth serial communication module is based on a new
generation of Bluetooth Specification V4.0 BLE Bluetooth protocol
data transmission module. Wireless operating band for the 2.4GHz
ISM, modulation is GFSK. Module maximum transmit power 4dBm,
receiver sensitivity -93dBm, under open environment and can achieve
80 meters iphone4s long distance communications.
Stamp hole modules package, can patch welding, module size 26.9mm ×
13mm × 2.2mm, easily embedded within the client application
Module using TI's CC2540 chip, 256K Byte configuration space,
support for AT commands, users may need to change the role (master
and slave mode) and the baud rate, device name, password and other
parameters pairing, use and flexible.
TXD: serial port, 3.3V TTL level.
RXD: serial receiver, 3.3V TTL level.
CTS: serial flow control is not supported.
RTS: serial flow control is not supported.
DC: simulation, burn the clock pin.
DD: simulation, data burning feet.
RST: Reset pin module requires low level of not less than 5ms be
VCC: module power pins require 3.3V DC power supply current is not
less than 100mA. Operating voltage range: 2.0V ~ 3.6V.
GND: Module common ground.
LED: module indicator output pin, high output, when connected in
series with a resistor LED.
Host unrecorded machine address from light per 100ms;
When the machine address from the host record, bright 900ms per
Slave bright one second every two seconds.
After connection, LED lit.
KEY: input pin, internal pull-down. The feet high, clear the record
for the host address from the machine.