HiLetgo HC-05 6 Pin Wireless Bluetooth RF Transceiver Module Serial BT Module for Arduino

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Recibido en tiempo y firma. Fácil de configurar y trabajar con él.

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!

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.

Hooked it up to an Arduino Uno, worked fine.

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 !!