Arduino Delphi Serial Communication
Delphi and Arduino Arduino is a single-board microcontroller. This example uses 5 LEDs that will be controlled from the Delphi program via serial communication. Software Serial Example. Arduino and Genuino boards have built in support for serial communication on pins 0 and 1, but what if you need more serial ports?
- Software Serial Example. Arduino and Genuino boards have built in support for serial communication on pins 0 and 1, but what if you need more serial ports?
- Delphi Tutorials TOC - - - - - - Other material for programmers ARDUINO (Great Microprocessor) HOME Bookmark this on Delicious Recommend to StumbleUpon Delphi tutorial: serial comms, i.e. Using the COM port.
Used for communication between the Arduino board and a computer or other devices. All Arduino boards have at least one serial port (also known as a UART or USART): Serial. Communication; Power supplies. The demonstration's master device was programmed with Delphi. The system uses a dedicated serial link, leaving the Arduino's.
I want to read a string from my Arduino via Usb(Serial).I made this script but it has a problem:
The problem is that the 'count' isn't right.For example, when i send 'Backspace' this is the output:
Serial Communication Ppt
But on the arduino serial monitor it works fine.Does anyone know why the the 'count' isn't right and how to fix it?
RRUZ2 Answers
As Remy said, when receiving data in serial communication you may have many events triggerin for the same string. In fact each byte is an event, but drivers usually buffer the data.
To know the end of your message you should add some char sequence at the end of this message. If you send the string from Arduino using Serial.println() instead of Serial.print(), then it will add a new line mark after the text. This way you just need to add the characters to the ListBox1.Items.Text property instead of using Add function. You need to allow the chars #10 and #13 to make this work.
Also, if you do it this way, you don't need to send the bell character (#7).
You are assuming a 1-to-1 relationship between the complete data and the event. There is no such guarantee. It may take multiple events to receive the complete data. The event is simply reporting that there is some data available at that moment. In your example, you likely received an event for 3 characters, and then received a second event for the remaining 6 characters. You called Add() twice, once for each portion of data, rather than once for the complete data.
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Arduino Serial Available
As such, you have to analyze the data you are receiving, caching it as needed between events, and then call Add() only when you have complete data to display. For example:
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