Arduino slave exemple

[MarcoeSilvia]

Good morning, meanwhile congratulations to the library. Is it possible to have an example for the slave? I searched everywhere and could not find it. Thank you very much.

[Vincent0892]

Hi MarcoeSilvia:

Have you found the answer how to setup a slave? I am also curious about your question. Thank you.

[vmiceli]

Here is a slave example using a different library:

#include <modbus.h> #include <modbusDevice.h> #include <modbusRegBank.h> #include <modbusSlave.h>

//Setup the brewtrollers register bank //All of the data accumulated will be stored here modbusDevice regBank;

//Create the modbus slave protocol handler modbusSlave slave;

#define RS485TxEnablePin 2 #define RS485Baud 9600 #define RS485Format SERIAL_8E1

#define LED1 3 #define LED2 4

void setup() {
//Assign the modbus device ID.
regBank.setId(1);

/* modbus registers follow the following format 00001-09999 Digital Outputs, A master device can read and write to these registers 10001-19999 Digital Inputs, A master device can only read the values from these registers 30001-39999 Analog Inputs, A master device can only read the values from these registers 40001-49999 Analog Outputs, A master device can read and write to these registers

Analog values are 16 bit unsigned words stored with a range of 0-32767 Digital values are stored as bytes, a zero value is OFF and any nonzer value is ON

*/

//Add Digital Output registers regBank.add(00001); regBank.add(00002);

//Add Analog Input registers to the register bank regBank.add(30001);
regBank.add(30002);

//Add Analog Output registers to the register bank regBank.add(40001);
regBank.add(40002);

slave._device = &regBank;

slave.setBaud(&Serial,RS485Baud,RS485Format,RS485TxEnablePin);
pinMode(LED1, OUTPUT); pinMode(LED2, OUTPUT); }

void loop() { digitalWrite(LED1, regBank.get(00001)); digitalWrite(LED2, regBank.get(00002)); regBank.set(30001, (word) analogRead(A0)); //from 0 - 1023 regBank.set(30002, (word) analogRead(A1)); //from 0 - 1023 slave.run();
}

[yashupatel]

Hardware serial error