Development v12

Warning - Product Update

All the resources present on this section belong to Waspmote v12, Waspmote Plug & Sense! v12 and Meshlium v3.8.

If you have a Waspmote v15, Waspmote Plug & Sense! v15 or Meshlium v4.0 please go to the new Development Section.

Check what is your version and what are the differences between the old and the new one in this document.

» RS-485 01: Send Data

This sketch shows how to send data through RS-485 standard.

Required Materials

1 x Waspmote
1 x Battery
1 x RS-485

Notes

- Waspmote must be powered with a battery
- RS-485 does not specify or recommend any communications protocol.
- For a complete communication protocol, please see the Modbus examples
- This example can be executed in Waspmote v12 and Waspmote v15

Code

/*   
 *  ------ [RS-485_01] Send Data -------- 
 *   
 *  This sketch shows how to send data through RS-485 standard. 
 *  This standard defines the electrical characteristics of drivers
 *  and receivers for use in digital systems. It does not specify
 *  or recommend any communications protocol. For a complete 
 *  communication protocol, please see the Modbus examples. 
 *   
 *  Copyright (C) 2016 Libelium Comunicaciones Distribuidas S.L. 
 *  http://www.libelium.com 
 *   
 *  This program is free software: you can redistribute it and/or modify 
 *  it under the terms of the GNU General Public License as published by 
 *  the Free Software Foundation, either version 2 of the License, or 
 *  (at your option) any later version. 
 *   
 *  This program is distributed in the hope that it will be useful, 
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 *  GNU General Public License for more details. 
 *   
 *  You should have received a copy of the GNU General Public License 
 *  along with this program. If not, see <http://www.gnu.org/licenses/>. 
 *   
 *  Version:          3.0 
 *  Implementation:   Ahmad Saad
 */

// Include always this library when you are using the Wasp485 functions  
#include <Wasp485.h>

void setup() {

  // Power on the USB for viewing data in the serial monitor
  USB.ON();
  // Print hello message
  USB.println(F("Hello this is RS-485 communication send data example."));
  delay(100);

  // Powers on the module and assigns the SPI in socket0
  if ( W485.ON() == 0) 
  {
     USB.println(F("RS-485 module started successfully"));
  } 
  else 
  {
     USB.println(F("RS-485 did not initialize correctly"));
  }
  
  delay(100);

  // Configure the baud rate of the module
  W485.baudRateConfig(9600);
  // Configure the parity bit as disabled 
  W485.parityBit(DISABLE);
  // Use one stop bit configuration
  W485.stopBitConfig(1);  
}

void loop() {     

  // Reading the analog input 1 
  int analog1 = analogRead(ANALOG1);
  // Reading the analog input 2 
  int analog2 = analogRead(ANALOG2); 

  // Send data through RS-485 line
  W485.send("Data from analog1 input: ");
  W485.send(analog1);
  W485.send("\n");

  W485.send("Data from analog2 input: ");
  W485.send(analog2);
  W485.send("\n");  

  delay(500);

}

Output

H#
RS485 module started successfully
Hello this is RS485 communication send data example.

Quick Publish: