Visual Foxpro Serial Communication Arduino

16-09-2021 admin

Hello - I am trying to learn about the Arduino and do a project here. While I am going to be attempting smaller things along the way, my goal is to complete the main project after I'm better acquainted with the Arduino. I am just getting started and have a lot to learn. However, looking into the feasibility of the project, I am trying to figure a couple of things out: If I wanted to attach a 9.

Dear all, I am trying to communicate the arduino serially through usb communication by sending a character. Serial communication USB using C# (Visual Studio).
Serial connection. The Arduino uses a FTDI USB to serial port chip. This enables the board to appear as a serial port via a USB connection. When first connected, I direct Windows to the FTDI driver. After loading the driver, my computer allocated com8 for the Arduino. Communication then is just a matter of sending and receiving strings on com8.

In this short article will be presented how you can set up serial communication between Arduino Nano or Uno and a C# application. Many articles are written about this subject all around the internet, but I have not found any of them that could help to create a “real world” and usable application, so I am going to show you my way of dealing with this task.

Lets see what is a serial communication, serial communication port or interface.

Serial communication is a meaning of data transfer between two physical devices, like PC to PC, PC to uC. One of the most popular serial communication interface is USB (Universal Serial Bus), that is the one we are going to use.

Working principles

The whole communication is based on Visual Studios Serial Port library and a timer. The Serial port library takes care of all low level addressing and hardware management. In this project the default parameters are used, only the COM port name is changed to our desired port, because that is different for every USB port.

For setting up a serial (COM) communication between two devices the following steps should be used:

Scan the available ports

</div><table><tbody><tr><td><div><div>2</div><div>4</div><div>6</div><div>8</div><div>10</div><div>12</div><div>14</div><div>16</div><div>18</div><div>20</div><div>22</div><div>24</div><div>26</div></div></td><td><div><div><span>//finding available serial ports and filling up the combo box with found port names</span></div><div><span>foreach</span><span>(</span><span>string</span><span>s</span><span>in</span><span>SerialPort</span><span>.</span><span>GetPortNames</span><span>(</span><span>)</span><span>)</span></div><div><span>{</span></div><div><span>portComboBox</span><span>.</span><span>Items</span><span>.</span><span>Add</span><span>(</span><span>s</span><span>)</span><span>;</span></div><div><span>//incrementing the items found variable</span></div><div><span>}</span></div><div><span>if</span><span>(</span><span>itemsFound</span><span><</span><span>1</span><span>)</span></div><div><span>MessageBox</span><span>.</span><span>Show</span><span>(</span><span>'NO ITEMS FOUND'</span><span>)</span><span>;</span></div><div><span>//if no serial devices have been found, an error message window will show up</span></div><div><span>else</span></div><div><span>portComboBox</span><span>.</span><span>SelectedIndex</span><span>=</span><span>0</span><span>;</span></div><div><span>//if there were found active ports, then the first one is going to be automatically selected in the combo box</span></div></div></td></tr></tbody></table><p>Select one of the available ports and pass the desired parameters to the corresponding variables of SerialPort component</p><div><textarea wrap='soft' readonly='>serialPort1.PortName = portComboBox.Text; //if the value of the combo box was changed then the serial port component port name will be updated

2	//if the value of the combo box was changed then the serial port component port name will be updated

Create the connection to the external device

<p>You need to paste this line in your code where the helper method is going to be placed.</p><div><textarea wrap='soft' readonly='>delegate void StringArgReturningVoidDelegate(string textToBePlaced);

delegatevoidStringArgReturningVoidDelegate(stringtextToBePlaced);

The task of this delegation is to enable the asynchronous calls for setting the text into a textbox or label.

Here is the method (function) that should be used and changed accordingly to your needs:

</div><table><tbody><tr><td><div><div>2</div><div>4</div><div>6</div><div>8</div><div>10</div><div>12</div><div>14</div><div>16</div><div>18</div><div>20</div><div>22</div><div>24</div><div>26</div><div>28</div><div>30</div><div>32</div><div>34</div><div>36</div><div>38</div><div>40</div><div>42</div><div>44</div><div>46</div><div>48</div></div></td><td><div><div><span>{</span><span>//if this string is sent from pc, than do the following</span></div><div><span>Serial</span><span>.</span><span>println</span><span>(</span><span>inputString</span><span>)</span><span>;</span></div><div><span>}</span></div><div><span>inputString</span><span>=</span><span>'</span><span>;</span></div><div><span>stringComplete</span><span>=</span><span>false</span><span>;</span></div><div><span>}</span></div><div><span>//ending char, by default newline, can be anything</span></div><div><span>if</span><span>(</span><span>inChar</span><span>'n'</span><span>)</span><span>{</span></div><div><span>stringComplete</span><span>=</span><span>true</span><span>;</span></div><div><span>}</span></div><div><span>}</span></div></div></td></tr></tbody></table><h4>Conclusion</h4><p>So understanding how this connection works, or using this C# example application can bootstrap your projects.</p><p>Resources:</p></p>
 
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