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JY-MCU Bluetooth Wireless Serial Port Module (slave)
HCARDU0004
JY-MCU Arduino Bluetooth Wireless Serial Port Module (Slave)
JY-MCU Arduino Bluetooth Wireless Serial Port Module. These modules are available in master (HCARDU0064) and slave (HCARDU0004) versions. Please see FAQ section on our support forum here before purchasing one of these modules.
Default password: 1234
Baud rate: 9600
Dimensions: 1.73 in x 0.63 in x 0.28 in (4.4 cm x 1.6 cm x 0.7 cm)
PINOUT
1.....VCC
2.....GND
3.....TXD
4.....RXD
AT Commands:
Module must be disconnected (Led flashing) to issue AT commands.
Communication Test :
Send: AT
Response: OK
Change Baud Rate:
Send: AT+BAUD<b>
<b>......Baud
1......1200
2......2400
3......4800
4......9600
5......19200
6......38400
7......57600
8......115200
E.g.
Send: AT+BAUD7
Response: OK57600
Change Bluetooth Device Name:
Send: AT+NAME<devicename>
E.g.
Send: AT+NAMEHobbComp
Response: OKHobbyComp
Change Pincode:
Send : AT+PINxxxx
Response: OKsetpin
Example code and manual available on our support forum here.
HCARDU0004
7 Items
Specific References
JY-MCU Arduino Bluetooth Wireless Serial Port Module (Slave)