Arduino Delphi Serial Communication Cable
An example of an USB-Serial cable using CH340 chipset. With the advent of the maker movement and the Arduino revolution, because of the Arduino open.
For people live in Indonesia where buying Arduino from overseas is expensive and requires months of delivery time, you can buy Arduino compatible boards from Vcc2Gnd.com, toko komponen elektronika yang menjual Arduino dengan harga murah. The price of Arduino Pro Mini in this store is incredibly cheap, less than US$7 [ cek harga jual Arduino Pro Mini ATmega328 16 MHz ].
I've found this piece of code for Delphi and Lazarus (free pascal), It suppose to control the level of brightness of a LED through the pin 7 of Arduino Board. Example comes with Arduino Sketch and Delphi/Lazarus Project. It uses freeware Synaser library to communicate directly to the serial port.
Penguin Cult Lab made a simple Arduino controller from Delphi, here the screen-shot:
This example uses 5 LEDs that will be controlled from the Delphi program via serial communication. Library used for serial communication is open source library the ComPort. Download zipped Delphi source code.
From Arduino, enter following code and save it as 'delphi_leds.pde':
Description
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), and some have several.
| Board | USB CDC name | Serial pins | Serial1 pins | Serial2 pins | Serial3 pins |
|---|---|---|---|---|---|
Uno, Nano, Mini | 0(RX), 1(TX) | ||||
Mega | 0(RX), 1(TX) | 19(RX), 18(TX) | 17(RX), 16(TX) | 15(RX), 14(TX) | |
Leonardo, Micro, Yún | Serial Intel gma 4500 drivers for mac. | 0(RX), 1(TX) | |||
Uno WiFi Rev.2 | Connected to USB | 0(RX), 1(TX) | Connected to NINA | ||
MKR boards | Serial | 13(RX), 14(TX) | |||
Zero | SerialUSB (Native USB Port only) | Connected to Programming Port | 0(RX), 1(TX) | ||
Due | SerialUSB (Native USB Port only) | 0(RX), 1(TX) | 19(RX), 18(TX) | 17(RX), 16(TX) | 15(RX), 14(TX) |
101 | Serial | 0(RX), 1(TX) |
On Uno, Nano, Mini, and Mega, pins 0 and 1 are used for communication with the computer. Connecting anything to these pins can interfere with that communication, including causing failed uploads to the board.
You can use the Arduino environment’s built-in serial monitor to communicate with an Arduino board. Click the serial monitor button in the toolbar and select the same baud rate used in the call to begin().
Serial communication on pins TX/RX uses TTL logic levels (5V or 3.3V depending on the board). Don’t connect these pins directly to an RS232 serial port; they operate at +/- 12V and can damage your Arduino board.
To use these extra serial ports to communicate with your personal computer, you will need an additional USB-to-serial adaptor, as they are not connected to the Mega’s USB-to-serial adaptor. To use them to communicate with an external TTL serial device, connect the TX pin to your device’s RX pin, the RX to your device’s TX pin, and the ground of your Mega to your device’s ground.