all,
I wanted to do a capture and encoding of camera modules, and made in the form uvc device, now I have a development board can capture and encoding, If I implementing the board to act as a UVC device, when used otg or usb connection the development board, you can see the image acquisition.
Related
I'm developing a new board that should connect to other devices like PLC or industrial PC trough rs232.
The remote devices will connect to read and set some parameters (most of them one byte value).
I'm asking if is there any standard protocol to do that or if I can implement something proprietary that customers must follow .
I tought to use AT commands but my device has nothing to do with modems.
Currently I have a server, that communicates with a projector through a RS232. The server opens a com port when the projector is connected. The same happens to any PC when a certain type of device is connected through the USB (lets say an Arduino for example). What I want to do it basically replace the projector with a PC/Arduino/Raspberry without the server noticing anything. That would mean the server will recognise the connected PC and open a COM port for it. What do I need to do on the PC so that it automatically opens a com port on the server? I guess there is something very basic that any printer, Arduino, projector etc does, that computers recognise it as a "com port device".
P.S. Doesn't matter the OS on the PC, I just need to make it work and then implement w/e I need to do with the established communication over the port.
P.S.2 I've searched a lot about it, but probabl I am doing it wrong, because I didn't find my type of question anywhere.
COM ports are basically hardware that is detected by the system. Let's say, if an Arduino is connected to a PC, it has its onboard USB to TTL converter which can be found in the device manager(if using windows). Similar USB to TTL converters are there in the market like CP2102, PL2303 which acts like a COM port even if no device is connected further to it. it may be possible that the program you are using(as you referred server) may be sending some data over the serial port and verifying the hardware.
What you need to do to replace it is, first of all, find the baud rate at which the communication is going on, then, listen over the serial lines which machine is sending which message in the sequence(there must be a handshake as I mentioned earlier), if a complicated algorithm is not used by the device, you can simply mimic the device by sending same messages over serial.
how the bellow connection can be done , what the protocol that must be used to send bytes from computer through it's serial WiFi and receive the bytes in Arduino using ESP8266-01 WiFi Serial Transceiver Module.
computer AND esp8266 WITH arduino
It depends on what you want to accomplish, and what roles you want the computer and the arduino/esp combi to play. You can put the ESP in station or access point mode (or mixed), and have it talk to the arduino via the serial interface. The communication with the PC will indeed go via wifi/tcp protocol, but depending on your specific requirements you will have to decide one the roles. Then you can make the ESP a web client or a web server, mainly depending on the direction of the flow of information.
I assume you want to query the Arduino from the PC, in which you can send a HTTP/GET request from the PC to a simple web server on the ESP.
There are various examples in the Arduino examples that do just that to give you a start, available when you install the ESP library in the Arduino IDE, see: https://github.com/esp8266/Arduino
HTH
I need to send data (an integer) from an Arduino to a C program on a PC. I know that the connection is fine, because with X-CTU works perfectly. I need to do this in AT mode but I don't know how to start.
If you're using the XBee modules in AT mode, then it isn't much different than what you'd have to do with a direct serial cable connection between the Arduino and PC. Look for sample programs demonstrating serial communications for both platforms.
Having the connection working with X-CTU is an excellent starting point, since you have confirmed that the radio modules are communicating correctly.
On the PC, you might want to look at this Open Source XBee Host Library on GitHub. It includes a sample program called "xbee_term" that demonstrates a simple serial terminal for using an XBee in AT mode. It also has a layered API to allow for easy use of XBee modules in API mode -- which you would need to use if the PC was going to communicate with multiple Arduino nodes running in AT mode.
As for sending an int, you can use sprintf() to format it as a string to send over the wireless link, and strtol() to convert it back to an int on the PC end.
I would like to use a standalone GSM Module that can interface with other systems like TV, AC, Fridge, etc.. via an SMS or a Call
For example:
1. If the GSM Module is hooked up to a Smoke Sensor, when there is an alert the GSM Module should be able to send as SMS.
I think there needs to a hardware component (that connects to the Smoke Sensor and GSM Module) where I can install program to send a SMS message when there is a signal from Smoke Sensor.
I would like to know on what this hardware component can be, what programming languages can be used and how the hardware component can interface with various devices.
Thanks!
An easy way to get a programmable GSM module is to get a cheap Android smart phone. For connectivity, you will need to build your own solutions unless the sensors already have some interface. You may want to look into Arduino microcontrollers for that. You can interface to the Android device using Wifi, Bluetooth, USB (newer devices support USB host mode, the cheap ones may not) or the audio jack.
Best solution depends on your resources and how many devices you need.
If you have big budget and hardware and software designers, then you could use naked GSM/UMTS module from some m2m module vendor like Cinterion or Telit. And own MCU for controlling it.
But if you need only few devices, then you could use some programmable GSM/UMTS terminal module, which contain all needed stuff: case, sim-holder, antenna connector, some GPIOs and modem.
For example Cinterion TC65T is this kind of terminal module. It can run a java (J2ME) program. Java programs of TC65T have access to GPIOs, which can be connected to smoke sensor for example. Java programs can also send SMS messages.
The Cinterion TC65T terminal was a 2G cellular device with a Java Virtual Machine to allow you to run J2ME 3.2 applications. Now days you could use a Terminal such as the Cinterion EHS6T-USB which is a 2G and 3G device with Java.
You might find it easier to get hold of a Cinterion "concept board" which has a Java enabled 2G and 3G cellular module on there along with an interface for Arduino style shields.
http://www.gemalto.com/m2m/development/cinterion-concept-board
It runs from a USB lead, plugged into you laptop or PC and need no other external power supply for development. I used one of these connected to a battery, and an Arduino relay board plugged in, to be able to switch our Christmas tree lights on and off via SMS.