Kq330 power line communication

Projects General Guidance
1

Hello arduino community,

I want to use kq330 for data transmission via power line communication.
Both modules are powered up via arduino's 5V pin and gnd.

Here, problem that i am facing is that receiving end is i am not able to get whatever has been sent from transmitter end.

Seeking some and heavily blocked on this problem.

2

This might help.

Also consider the tx & rx modules need to be on the SAME phase of the AC supply.

3

@lastchancename
hey thanks for this,

Could please provide any sample code and connection diagram regarding this.
My concern is even though each and every connection seems correct from power to tx/rx it is not working.

One strange thing i have noticed that even though there is no transmitter in power line but receiver still prints some garbage data.

this is arduino code i am using:

#include <SoftwareSerial.h>

/* led indicator led */
#define led 13

//to store state of led
bool led_state = LOW;

/* board type */
#define TX  1
#define RX  0
#define PLC_MODE      TX


SoftwareSerial plc_serial(2, 3); // Rx, Tx

void setup() {

    //KQ330 works on 9600 baudrate
    plc_serial.begin(9600);

    //serial monitor baudrate
    Serial.begin(115200);
    pinMode(led, OUTPUT);
}

void loop() {

//transmit data if board type is transmitter
#if PLC_MODE

    //print 'H' for every 1 second of interval
    plc_serial.print("H");

    //toggle led for every 1 second of interval
    led_state = digitalRead(led);
    digitalWrite(led, !led_state);

    delay(1000);



//receive data if board type is receiver
#else 
    if (plc_serial.available()) {
        c = (char)plc_serial.read();
        Serial.println(c);
        /*
            Process received data
        */
    }
#endif
}
4

Sorry,
I know zero about this module. I just went searching as if it was my problem to solve. Unfortunately, we’re in the same boat from here on.

Luckily, you have the devices in your hand !

5

No worries, thanks for your time.

6

Communication does not seems very realiable, even in the github example posted above they are receiving lots of noise. So think you have to add some checksum and redundancy to obtain reliable communication.
The transmitter and receiver power supply are separated ( the trasmitter one is near the ac lines and draws 260mA, quite power hungry ).
Datasheet is quite poor!
Did you succeded in receiving anything? Try sending more than 1 char a time and ( sorry if it sounds obvious ) did you cross the rx/tx from the board with tx/rx from the modem?

P.S.
'A few' year ago I made a powerline modem for a customer for controlling lights ( so this remembers me 'the good old days' )

7

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