Hello everyone. I need help.I work this code but ı get library error.How I can obtain ModbusRtu library and I make communication with rs485 shield arduino.I wait suggestions.Thankss..
/**
- Modbus slave example 3:
- The purpose of this example is to link a data array
- from the Arduino to an external device through RS485.
- Recommended Modbus Master: QModbus
-
http://qmodbus.sourceforge.net/
*/
#include <ModbusRtu.h>
// assign the Arduino pin that must be connected to RE-DE RS485 transceiver
#define TXEN 2
// data array for modbus network sharing
uint16_t au16data[16] = {
3, 1415, 9265, 4, 2, 7182, 28182, 8, 0, 0, 0, 0, 0, 0, 1, -1 };
/**
- Modbus object declaration
- u8id : node id = 0 for master, = 1..247 for slave
- u8serno : serial port (use 0 for Serial)
- u8txenpin : 0 for RS-232 and USB-FTDI
- or any pin number > 1 for RS-485
*/
Modbus slave(1,0,TXEN); // this is slave @1 and RS-485
void setup() {
slave.begin( 19200 ); // baud-rate at 19200
}
void loop() {
slave.poll( au16data, 16 );
}