Go look at the advice I already gave you again (). You should especially look at the example I gave you. No need to initialize the same port twice. You need to tell the VISA Read to read MORE bytes than your message. I like to use 50. Why do you have a 5 second wait in your write loop before sending a response? For where you are sending the message, change your message to be in ' Codes' mode. LabVIEW Setup; LabVIEW RPC; The LabVIEW vi's; Using the LabVIEW RPC vi's; Using RPC with Custom Code; Serial Communication; The Protocol; mbed. You are not sending the Line Feed (0xA, n). You are actually sending a ' ' and an 'n'. When you switch to ' Codes', then you will see ' n'. ' ' is the code for a single ' '. I have done this on purpose. I wanted to show you how the Arduino reads numbers from the com port, and how easy it is to exclude vital functionality in your code. I have kept this script simple, however, if you wanted to, you could make the Arduino deal with each of the above situations and more. Multiplication, division and subtraction is handled in the same way. This is the last thing I want you to try before we go to the next stage: 6. Enter this sequence: +1= Result: +1= +1= Result: +1= - Note that the maximum size of a 'long' number is. Amazon cloud drive client for mac. If you add one to this number, the result is equal to the minimum size of a 'long' which is. STAGE 4: Sending doubles to Arduino: The double doubler. The blue text represents the string (or array of characters) being sent using lines 19 and 21. The red text represents the actual double being sent using lines 20 and 22. You will notice that myDub2 rounds to 2.00. This may or may not be what you want. If you wish to increase the number of decimal places, then you will need to change lines 20 and 22 to the following: 20 Serial.println(myDub1, 4 ); 22 Serial.println(myDub2, 4 ); The number 4 highlighted in red, indicates the number of decimal places you wish to send. Adobe indesign cs6 for mac free trial. And try changing this number to something bigger or smaller. --------------------------------------------------------------------------------------------------- Ok - now that we understand this little Serial.print(double,decimals) trick, we will now get the Arduino to echo back a Double. Before we jump in, perhaps we should try and map out our strategy. For this we will choose a simple decimal to make it easier. So in this example, we will choose 0.1. STAGE 5: Sending sensor data to the Serial Monitor We know the Arduino is very good at copy-Cat games, how about getting the Arduino to send us some data from one of our sensors. We will use the Serial Monitor to view the sensor data. Disconnect the USB cable, and hook up one of your favourite analog sensors to your Arduino. For simplicity, I am going to hook up a potentiometer as per the Fritzing sketch below. Parts Required • Arduino UNO (or equivalent) • Computer with USB cable • Breadboard • Potentiometer • 3 Wires. Hi Anonymous, Please note the difference between Serial.write() and Serial.print(). See stage 4 of this tutorial on how to send a value such as 1.456 from the Arduino to the Serial Monitor. Once you get this part working, then you can work on the other half of your project, which would be the task of getting Simulink to listen for Serial data. If you wanted to send 1.456 through using Serial.write, then I would write the code like this: Serial.write(49); Serial.write(46); Serial.write(52); Serial.write(53); Serial.write(54); Serial.println(); You may want to look at the ASCII table as to how I got those numbers. I'll give you a hint: When you write 49, it sends through a 1 If you choose to send through the value using Serial.print(): I would send it through like this: Serial.println(1.456, 3); If you write it like this: Serial.println(1.456); then it will only send to the default 2 decimal places which is 1.46 Hope this helps Scott. Anonymous Thanks for your answer, Scott C! I understand that I can send different types of data depending on using.write or print. On simulink I have a block that strictly needs his input data to be bytes, that is the reason I am using Serial.write. In that Simulink block, I can choose how the data can be shown (double, single, int8, unint8.). My problem is that just int8 or unint8 works. Once I select 'double' or 'single', the data obtained is not correct. I assume that the problem remains on the sender, the arduino, and consequently Serial.write. Then, once I use Serial.write(1.456),theorically the receiver should or should not be able to obtain 1.456 again? Thanks for your effort! Anonymous Thanks for your help Scott, The block I am using does not understand about strings I guess. In simulink you are able to select the data that is receiving, that is: int8,int16,int32, single and double. You can select the 'parity' too, which I selected 'none' (from: none, even, odd, mark or space), is that correct?
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