I have two bluetooth HC-6 module and two Arduino UNO board. I want to connect these two arduino module using these bluetooth module. Can i connect?
HC-06 is a Slave only device, which means that you can connect your smartphone to it to send and get data, but itself can not act as a Master. You need at least one module that can act as Master, such as HC-05.
Note that HC-06 looks physically just like the HC-05, and not necessairly cheaper, I believe.
One connected to a HC-05 zs-040 and one connected to a HC-06 zs-040.
The HC-05 has a connection from pin 34 to +3.3v. This activates “full” AT mode.
enter image description here
Related
Why are there two COM ports after connecting the Bluetooth HC-05 module to my PC running on WIN10?
See this image from device manager:
For sending data I use only one of them but I have to check it before which is correct. I have no idea what the second is used for.
Any idea?
I am trying to do a sample application using Qt to communicate to Arduino board DUE.
But When one communication is started other is not able to connect,meaning when i start my Arduino first I am not able to start Qt application to read or write data and viceversa.
Can anybody tell me whether this is possible if Yes please help me in this and i ll try to post my sample code.
If I understand your question correctly, you want to be able to connect to your Arduino device (via its USB to RS232 converter) while the Arduino IDE, and thus, the serial monitor is running.
If that's the case, that is simply not possible. Not because of Qt, nor because of Arduino. That's the way serial ports work. You can't connect to the same port twice from different processes.
Since the microcontroller on the Arduino DUE has 4 UARTS, you may consider using one of them (with another USB to serial adapter, and thus, having another COM port showing up on your PC) to interface the board with your Qt application while the Arduino IDE is still connected to the "main" serial port.
Also, keep in mind that the Arduino Due works with 3.3 V, so ensure that the USB to serial adapter is compatbile with that voltage range.
I am trying to write standalone ESP8266 code so that it can communicate to wifi and change its states. For this, what I want to do is to send some command "AT+CWMODE=1" or "AT+CWMODE=3" to ESP8266 via code and toggle them on push button tap.
So, like in Arduino there is a Serial.write which writes on a serial monitor via SoftwareSerial class.
But when I am sending Serial.write("AT+CWMODE=1") it prints on the monitor as a string rather than changing the wifi state.
Is there a way to send AT commands without using Arduino chip software serial pins?
Thanks.
Sorted out the issue. All those who are new like me to ESP world, I did the serial.write "AT" commands using wifi classes of Esp8266.
You need to connect the board as ESP8266 Generic Module and send/receive data using ESP8266Wifi class, by reading the scanned networks, changing mode, using Serial.read on the connected devices on Access point of Esp8266.
Let me know if someone need help on this future, I will be happy to help.
I have the Arduino UNO board and I want to know if it is possible to use both the USB connection (for exchanging data) and the external jack to power supply it.
I will use the following cable: http://ecx.images-amazon.com/images/I/41OMXaj5cPL.SY355.jpg with a AC-DC 5V adaptor in order to power supply the Arduino. However, I want to use also the USB connection in order to send some data from the computer.
Both will be connected at the same time.
In short, I want the Arduino to be able to run even if the computer is OFF and whenever I open the computer to send data to Arduino from USB connection.
Is this possible? Will the Arduino Uno board support it?
Yes. From the official Arduino website:
Power
The Arduino Uno can be powered via the USB connection or with an external power supply. The power source is selected automatically.
External DC power will override USB power if the Arduino detects it. [Source]
as other said, it is absolutely possible to have both usb and power jack plugged in.
but be aware that if you shut down your computer and turn it on after, when reading the usb port you'll restart the Arduino and might loose important data.
yeah both of them can be used. If you want to upload the code in arduino then simply use the usb cable otherwise keep it on adapter. it wont harm the device.
What I personally do is, I keep on plugging the adapter and remove the usb once I am done with uploading and then test it as normally the usb cable is quite small and I normally work on robots so I need long wires.
if you want just plugs it in, it's ok but Arduino board will chose one and usb has priority to other power source.
********* Very important :*****
if you are controlling other circuits, that are connected to an external power supply, with your Arduino and connecting it to your PC's usb, Arduino will have potential difference and it will cause current flow that will damage your PC and Arduino board. if you want to do such thing, you have to shield your Arduino board from your other circuits that you want to control and they have external power source. this could happen with optocouplers for digital ports, non signal analog ports with shield relays, and complex analog circuits for analog signals
I'm using an Arduino to read data from the web and display it. I can easily pass the data as serial using the supplied drivers, because they identify the COM port so I can send serial to the COM port.
However, I want to use 'real' USB techniques so the device can be plugged in and out like a normal USB device. I'm looking at using WinUSB as the driver. However, USB is all new to me. Is there an .inf file that uses WinUSB and an Arduino (I have an Uno)?
The lack of information on this is making me think I am going about this incorrectly.
Turns out that an Arduino Uno is not a genuine USB device.
It acts as a Serial to USB adapter. Consequently USB drivers don't talk to it.
I got round this by writing a sketch which reported back what device it was when it got the correct query from the PC.
On the PC I just iterated the Serial ports and sent the query to each port. The one that replied was the Arduino.
After that I record the port number and send serial data to the Arduino.
To learn the USB portion, maybe you could combine V-USB and the UNO?
Check out V-USB.
V-USB is a software-only implementation of a low-speed USB device for Atmel’s AVR® microcontrollers, making it possible to build USB hardware with almost any AVR® microcontroller, not requiring any additional chip.
While not necessarily Arduino, it may provide you the learning exprience you want, and let you use incorporate your UNO device.