JY-MCU Arduino Bluetooth Wireless Serial Port Module Bluetooth protocal : Bluetooth Specification v2.0+EDR Frequency : 2.4GHz ISM band Modulation : GFSK(Gaussian Frequency Shift Keying) Emission power : 4dBm, Class 2 Sensitivity :-84dBm at 0.1% BER Speed : Asynchronous: 2.1Mbps(Max) / 160 kbps Synchronous: 1Mbps/1Mbps Security : Authentication and encryption Profiles : Bluetooth serial port CSR chip : Bluetooth v2.0 Wave band : 2.4GHz-2.8GHz, SM Band Protocol : Bluetooth V2.0 Power Class : (+6dbm) Reception sensitivity:-85dBm Voltage : 3.3 (2.7V-4.2V) Current : Paring - 35mA, Connected - 8mA Temperature : -40~ +105 Degrees Celsius User defined Baud rate : 4800, 9600, 19200, 38400, 57600, 115200, 230400,460800,921600 ,1382400. Pin definition : * PIO8 connects with LED cathodea with 470ohm series resistor in between. LED NEGATIVE connects to ground. After powered on, flashing intervals differ in different states. * PIO9 is used to control LED indicating paring. It will be steady on when paring is successful. * PIO11, module state switching pin. HIGH response to AT command; LOW or floating regular work status. * With build-in reset circuit, reset is completed automatically after powered on. Steps to set to MASTER: * Set PIO11 HIGH with a 10K resistor in between. * Power on, module comes into AT Command Response Status * Open HyperTerminal or other serial tool, set the baud rate 38400, 8 data bits, 1 stop bit, no parity bit, no Flow Control * Via serial port, send characters "AT + ROLE = 1 r n",if successful, return "OK r n", where r n is carriage return. * Set PIO11 LOW, re-power, then in Master state, automatically search for slave module and connect.
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