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1.PCB Size: 37.3mm (Long) *15.5mm (wide)
2. Weight: 3.5g
3. Input voltage: 3.6V--6V, prohibit exceeding 7V
4. Leads 6 feet: EN/VCC/GND/RXD/TXD/STATE (Bluetooth state leads, not connected output low level, the output high level after connection)
5. With the connection status indicator, LED flash indicates no Bluetooth connection; Led slow flash indicates enter at command mode
6. On-board 3.3V voltage regulator chip, input voltage DC 3.6V-6V; When not paired, current about 30mA (due to LED lights flashing, current in the state of change); After the pairing succeeds, the current is about 10mA
7. Effective transmission distance of 10 meters in open area, more than 10 meters is possible, but not to ensure the quality of the connection
8. After pairing succeeds, can be used as full duplex serial port. No need to understand any Bluetooth protocol, but only support 8-bit data bits, 1-bit stop bits, no parity communication format. This is also the most commonly used communication format, does not support other formats!
9. Press the key and then power up the Bluetooth module to enter at mode, set parameters and query information
10. Can switch host and machine mode from at command
11. The module default baud rate is 9600, the default pairing password is 1234, the default name is HC-05
Wiring method:
VCC: Connect the power supply positive
GND: Connecting the cathode
RXD: The receiver, the Bluetooth module receives data from other devices, and the sending end TXD of the other devices normally
TXD: Send end, Bluetooth module sends data to other equipment; the receiving end RXD of the other equipments normally
En: To enable the end, need to enter the at mode when 3.3V
Note: this item doesn't works with iOS.
Package included:
1* HC-05 6 Pin Wireless Bluetooth RF Transceiver Module Serial BT Module for Arduino
Durwin Sharp
Reviewed in the United States on November 17, 2024
As advertised, just what I needed, immediate shipping, thanks!
Shivganga Ananta Bhaganagare
Reviewed in India on June 30, 2022
Nice product
Girish P.
Reviewed in the United States on June 19, 2021
Initially I was not able to follow how to use and did reach out to the tech support and they respond back on time, I just felt like using this little fellow is complicated but then I took step back and tried to look at each pin and setup and whoolaaaaa, it worked. No register nothing but simple connect to the pins. ohh and yes, this one didn't work with SoftwareSerial but worked with AltSoftSerial. I am fine with that but just thought to share in case if anyone gets in to the situation.
Pineapple22
Reviewed in the United States on November 24, 2021
I can enter AT mode just fine, but the BIND command doesn't work at all. I bought 2, and neither will BIND to any address that I set. I'm doing the exact same as all the tutorials I can find and all the other AT commands I try seem to work, but no matter what address I enter with BIND, it will not change the random one that it shipped with. RESET doesn't change it, ORGL doesn't change it. These are useless to me without that capability. I ordered these for a school project and am probably going to fail because I don't have time to order more, and these don't work.
José Miguel REGUEIRA SANCHEZ
Reviewed in Spain on September 15, 2020
Recibido en tiempo y firma. Fácil de configurar y trabajar con él.
Zach montgomer
Reviewed in the United States on April 21, 2020
A little rant coming up. In short, if you're thinking about this, then buy it. It works perfectly, and it's a great price.IF you were thinking of buying a different type of module, however, be careful.One module that is *flaming hot garbage is the AT-09, AKA MLT BT05 or the 4.1 BTE module. You can search online for a manual (one has been translated from mandarin, but you need to spend a while trying to find it) , and it will show ̶h̶o̶w̶ ̶its ̶s̶u̶p̶p̶o̶s̶e̶d̶ ̶t̶o̶ ̶w̶o̶r̶k̶ pinouts with confusing terminology. You'll be lucky setting it up and getting it into "AT" mode, a necessary step to getting it to function properly.I haven't tried other module types, but I wouldn't doubt that there are others like the AT-09 , so I can't stress enough to be careful that you aren't buying a malfunctioning module, or a notoriously bad module type like that of the AT-09 MLT BT05 4.1 BTEThanks for your time
Old EE
Reviewed in the United States on September 20, 2019
I though I was going to have to learn all about Bluetooth to use this, but I just connected it to my Arduino and used a serial terminal program on my computer or phone and I was able to send serial data. Very happy with the board. For my Android I'm using "Serial Bluetooth Terminal" which is great, and on the PC I'm using BlueDuino which kind of works. NOTE: This is Bluetooth, not BLE. Also, remember to swap TX and RX between the HC-05 and the Arduino.
Swoop
Reviewed in Australia on August 2, 2019
Hooked it up to an Arduino Uno, worked fine.
Trusting User
Reviewed in the United States on March 10, 2019
After searching through the web on how to use the HC-05, I ordered a few for a project. Eventually, I got the project working smoothly on an Arduino Uno. I designed a printed circuit board for a shield and have made several units. All work well.That is the good news. The bad news is it helps to be an electrical engineer with experience in embedded design. The various web sites were helpful, but most had errors. For example, some circuits did not use a level shifter for driving the RxD input or reading from TxD. Some level shifters are wired wrong and the choice of circuit can even slow down the fastest baud rates. Some Arduino Uno baud rates are not good choices because of clock frequency errors. If you run the HC-05 using hardware serial on an Uno, you have to pull the HC-05 out to program the Uno.Other websites either do not seem to understand the two modes of HC-05 operation, or at least they describe the poorly. One mode (power up while holding the button) enables a configuration mode that must be run at 38,400 Baud. After configuration, the other mode (for data transfer) runs at whatever baud rate was selected during configuration. My project actually lets the Uno power up the unit in the configuration mode, checks the configuration, then cycles the power to restart in the data transfer mode. Don't reconfigure the device every time you use it. That will probably burn out the nonvolatile memory that holds the parameters.Finally, Bluetooth itself can be tricky. I found that Windows 7 and Windows 10 can be finicky about connecting and disconnection with a Bluetooth device.Good luck with your project. It may take some effort to get everything working. So far, the modules, themselves, have all worked properly once I got the hardware and software designed properly.
Marco
Reviewed in Italy on October 6, 2019
Il prodotto arriva ben protetto, dentro una busta antistatica. Il PCB e' di qualita', ne' la soldermask ne' la silkscreen presentano sbavature, le saldature sono ben fatte.Aggengere connettivita' wireless ai propri progetti e' spesso utile, e il bluetooth e' tra i protocolli piu' flessibili in quando ci si puo' connettere sia da computer che da smartphone, senza bisogno di ulteriori ricevitori.Per usarlo basta alimentarlo e connetterlo a RX e TX di un Arduino o simili, scrivere sulla porta seriale le stringhe che si vogliono inviare e riceverle sul telefono dopo aver accoppiato il modulo.Attenzione, questo e' l'HC-05, modulo piu' avanzato rispetto all'HC-06 perche' puo' essere usato anche come master oltre che come slave. L'utilizzo base e' il medesimo dell'HC-06, ma in piu' supporta i comandi AT per essere configurato come master.Consigliato!The product arrives well protected, inside an antistatic bag. The PCB is of quality, neither the soldermask nor the silkscreen have smudges, the welds are well done. Adding wireless connectivity to your projects is often useful, and Bluetooth is one of the most flexible protocols in that you can connect from both your computer and smartphone, without the need for additional receivers. To use it just power it and connect it to RX and TX of an Arduino or similar, write on the serial port the strings you want to send and receive on the phone after coupling the module. Attention, this is the HC-05, more advanced module than the HC-06 because it can also be used as a master as well as a slave. The basic use is the same as the HC-06, but it also supports AT commands to be configured as master.Recommended!
Clark Family
Reviewed in the United States on January 27, 2019
This is a great Bluetooth board. It worked very well with my arduino. Please note that it cannot interface with apple products since it uses an older version of Bluetooth that apple has deemed a security hazard so it won’t work with apple but it worked with my PC and my arduino.
Alan
Reviewed in the United Kingdom on April 26, 2019
HC05 Bluetooth transceiver used to communicate from an Android tablet to a STM32F103 microcontroller, eventually to be used for DCC control of a model railway. The device arrived overnight thanks to Amazon Prime and was well packed in anti static bag clearly labelled with contents identity. The device appears well made with decent soldering and labelled pin out. I was able to program without problem using a USB-Serial converter and a terminal program running on Windows 10. Upon connecting to the STM32 microcontroller the device showed up under Bluetooth devices on my Android tablet and I was able to run the DCC app via Bluetooth. Very satisfied with the device, Blutooth can sometimes be temperamental to use but this was a good experience. Recommended !!
Customer
Reviewed in the United States on January 8, 2018
works great first try. easy to use. I connected this to my Arduino Uno R3 with a 1k and 2k resistor voltage divider on the rx pin. it ran with no errors for 16 continuous hours sending a serial message once per second. I only gave this a 4 star because it took 8 days to be delivered.
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