HC-05 Version D Bluetooth Module

HC-05 Version D Bluetooth Module

Module parameters:

• PCB size: 37.3mm (length) * 15.5mm (width)
• Weight: 3.5g 3.
• Input voltage:3.3V–6V, no more than 7V
• Anti-reverse connection of power supply, the module will not work if connected in reverse
• Lead out 6 pins: EN/VCC/GND/RXD/TXD/STATE (Bluetooth status lead out pin, output low level when not connected, output high level after connection)
• With connection status indicator, LED flashes quickly to indicate no Bluetooth connection; LED flashes slowly to indicate entering AT command mode
• Onboard 3.3V voltage regulator chip, input voltage DC 3.6V-6V; when not paired, the current is about 30mA (because the LED light flashes, the current is in a changing state); after successful pairing, the current is about 10mA
• The interface level is 3.3V, which can be directly connected to various microcontrollers (51/AVR/PIC/ARM/MSP430, etc.), and 5V microcontrollers can also be directly connected. Directly connect to the microcontroller serial port, not through the MAX232 chip!
• The effective transmission distance in open areas is 10 meters. It is possible to exceed 10 meters, but the connection quality is not guaranteed.
• After successful pairing, it can be used as a full-duplex serial port. No need to understand any Bluetooth protocol, but only supports 8 data bits, 1 stop bit, and no parity communication format. This is also a commonly used communication format, and other formats are not supported!
• Press the button and then power on the Bluetooth module to enter AT mode, set parameters and query information.
• You can switch between host and slave modes through AT commands.
• The module default baud rate is 9600, the default pairing password is 1234, and the default name is HC-05
• With transparent heat shrink tube protection.
• 2.Wiring method:
  ➢VCC: connected to the positive pole of the power supply
  ➢GND: connected to the negative pole of the power supply
  ➢RXD: receiving end, the Bluetooth module receives data sent from other devices; normally connected to the sending end of other devices TXD
  ➢TXD: sending end, the Bluetooth module sends data to other devices; normally connected to the receiving end of other devices RXD
  ➢EN: enable end, connect 3.3V when entering AT mode