Controllino does not receive the data RS485

[todakouma]

Hello,

For a project I have to connect a controllino with a m-duino in RS485, I managed to do the code on the M-Duino, sending and receiving data works but on the controllino just sending works.

The M-duino code:

Code:

// Include Industrial Shields libraries
#include//// IMPORTANT: check switches configuration

////////////////////////////////////////////////////////////////////////////////////////////////////
void setup() {
// Begin serial port
Serial.begin(9600);

// Begin RS485 port
RS485.begin(38400);
}

void loop() {

/*
Envois des données
*/
String str = “M-Duino”;

for (int i = 0; i < str.length(); ++i) {
// And send it to the RS-485 port
RS485.write(str[i]);
Serial.write(str[i]);
}

/*
Reception des données
*/
// if (RS485.available()) {
// byte rx = RS485.read();
//
// // Hexadecimal representation
// Serial.print(“HEX: “);
// Serial.print(rx, HEX);
//
// // Decimal representation
// Serial.print(“, DEC: “);
// Serial.println(rx, DEC);
// }

delay(5000);
}

 

The controllino code:

Code:

#include

void setup() {
Serial.begin(9600);
Serial3.begin(57600);
Controllino_RS485Init();
}

void loop() {
RecieveRS485();
//TestRS485(0);
delay(1000);
}

void TestRS485 (int mode)
{
DDRJ = DDRJ | B01100000;
PORTJ = PORTJ & B10011111;

switch (mode)
{
case 0:
PORTJ = PORTJ & B10011111;
PORTJ = PORTJ | B01000000;

delay (10);
Serial.println (“Sending test message, expected to return;”);
Serial3.print(“Controllino”);
break;

default:
Serial.println(“Wrong mode!”);
return;
}
}

void RecieveRS485()
{
//Serial.println(“Recieving RS485.”);
if (Serial3.available())
{
// print the new byte:
Serial.println((char)Serial3.read());
}
}

char Controllino_RS485Init( void )
{
pinMode(75, OUTPUT);
pinMode(76, OUTPUT);
Controllino_RS485RxEnable();

return 0;
}

void Controllino_RS485RxEnable( void )
{
digitalWrite(75, LOW);
digitalWrite(76, LOW);
return;
}

 

I think the error comes from the fact that the pinMode is configured in OUTPUT but on the demo they are too (demo link: https://www.controllino.biz/knowledge-base/rs485-modbusrtu/” class=”bbcode_url”>https://www.controllino.biz/knowledge-base/rs485-modbusrtu/ )

If you know why I cannot receive the data with the controllino I will listen to you

[Lukas]

Hello,

please, check our latest example code.

You do not need to manipulate with the direction control signals via registers. We already provide API for that.

I am not sure about the M-duino RS485 implementation, but it is always important to wait until the transmission is (physically) finished and then switch to reception.

Best regards,

Lukas

[todakouma]

Hello,

I copied the code but without success.

I do this because the CONTROLLINO library does not work, I have this error message:

#error Please, select one of the CONTROLLINO variants in Tools->Board

For now the M-Duino is only sending data so there should be no problem

Waiting for your reply,

Todakouma

[Lukas]

Hello,

and have you selected the CONTROLLINO variant properly?

[img]https://i.ibb.co/ftqhCyL/CONTROLLINO-MAXI.jpg[/img]

Thanks,

Lukas

[todakouma]

I don’t have the same thing, it shows this to me

[img]https://image.noelshack.com/fichiers/2020/33/1/1597067611-image.png[/img]

Thank you for your reply,

Todakouma

[Lukas]

Hello,

please follow the Instruction Manual, Chapter Software and Initial Startup.

Best regards,

Lukas

[todakouma]

Ok, it’s good the CONTROLLINO library working.

But still the same problem, I do not receive anything with the controllino in RS485

Waiting for your reply,

Todakouma

[Lukas]

Do you have the same baudrate at both sides? Have you interconnected also the grounds?

May I ask you to share the latest source codes at both sides and also a photo of the wiring?

Thanks!

Lukas

[todakouma]

It’s working !!!!!!!!!!!!

Thanks a lot

Todakouma

[Lukas]

Great!

You are welcome!

Lukas