This a part of tutorial that showing how to use serial communication between arduino. Delphi and USB communication (Arduino. The serial port. Connect two PCs. Monitor Serial Communication Between Two Arduino Arduino Serial Port. Delphi Connection Systems. Examples would be Borland Delphi 7. The best communication platform for the railway. Pi Stepper Motors Arduino Microcontroller Coaxial shaft for hour. Arduino atmega2560 proteus Search and download arduino atmega2560 proteus open.

Sometimes we need to connect Arduino boards located far away from each other. The RS485 is a very convenient way to connect the boards with just 2 wires, and can work to a distance of 1200m ( 4000 ft ). It also allows multiple boards to be connected easily to the same 2 wires. The downside is that the channel is shared between multiple devices, and only one of them can transmit at a time.

It is very easy to connect Arduino boards with RS485. There are cheap readily available, easy to use chip, and with the help of a graphical development environment for Arduino it is also very easy to program the communication. In this Tutorial I will show you how easy it is to connect and with RS485, and have the Arduino Nano send data from a sensor to the Arduino Mega, and the Arduino Mega to control the LED on the Arduino Nano, while also sending the data received from the Nano to a Serial Terminal.

Picture 2 • OneArduino compatible board (I use Arduino Nano, because I have one, but any other will be just fine) • One Arduino Mega 2560, or other board with 2 or more Serial ports • One10K Potentiometer • Two MAX485 RS-485 Modules • 9 Female-Female jumper wires • 4 Female-Male jumper wires • 1 Male-Male jumper wires • 2Jumpers with open top ( Picture 2 ) allowing a wire to be inserted from the top side between the pins Connect the Power and Control wires for the RS485 module to the Arduino Mega. The RS485 uses only 2 wires. Every device is connected to the 2 wires ( Picture 1 ). There are some resistors that are needed, however the MAX485 Modules that we use have these resistors already installed, so we can directly connect the modules with just 2 wires.

• Connect one end of a Female-Female jumper wire - A wire ( White wire ) to the ' A ' pin of one of the RS485 Modules ( Picture 2 and 3 ) • Connect one end of another Female-Female jumper wire - B wire ( Brown wire ) to the ' B ' pin of one of the RS485 Modules ( Picture 2 and 3 ) • Connect other end of a A wire ( White wire ) to the ' A ' pin of the other RS485 Module ( Picture 2 and 3 and 4 ) • Connect other end of a B wire ( Brown wire ) to the ' B ' pin of the other RS485 Module ( Picture 2 and 3 and 4 ) Start Visuino, and select the Arduino Nano Board type. Picture 6 We will send to the serial the value of Analog Channel 0 once a second.

The RS485 uses the same shared channel for both sending and receiving data. It is a Simplex line.

This means that the board can't send and receive data at the same time, and the RS485 module needs to be switched between transmitting and receiving mode. The Serial port of the Arduino component in Visuino has a pin indicating that the port is sending data. We will use this pin to control the direction (Transmit/Receive) of the RS485 module.

• Connect the ' Sending ' output pin of the ' Serial[ 0 ] ' channel of the Arduino component to the ' Digital ' input pin of the ' Digital[ 2 ] ' channel of the Arduino component ( Picture 1 ) In Visuino: Add and connect Char To Text component. Picture 2 We will receive 2 text commands ('on' and 'off') through the Serial port controlling the LED on pin 13. The commands will arrive as text followed by enter. To decode the 'on' command we first will construct a text from the arriving characters followed by Enter/New Line by using a ' ' component: • Type ' char ' in the Filter box of the Component Toolbox then select the ' Char To Text ' component ( Picture 1 ), and drop it in the design area • Connect the ' Out ' pin of the ' Serial[ 0 ] ' channel of the Arduino component to the 'In' pin of the CharToText1 component In Visuino: Add and connect Compare Text Value component. Picture 5 Now that we have the text we need to check if it is 'on' or 'off'.

Free Download Ductulator For Android. To do this it is enough to check just for 'on'. Picture 4 • In Visuino, Press F9 or click on the button shown on Picture 1 to generate the Arduino code, and open the Arduino IDE • Connect the Arduino Nano with the USB cable to the computer • In the Arduino IDE select the board type as Arduino Nano ( Picture 2 ) • In the Arduino IDE select the serial port to which the Arduino Nano board is connected ( Picture 3 ) • In the Arduino IDE, click on the Upload button, to compile and upload the code ( Picture 4 ) In Visuino: Select the Arduino Mega Board type.