K8056 + arduino

Kits PC Related Projects
1

Hello,

I am trying to control a k8056 8 channel relay card from an arduino microcontroller. I use a max232 adapter to (TTL -> RS232).
Normaly to switch the first relay, the string is:
K8056.exe IRP_MJ_WRITE Serial0 SUCCESS Length 20: 0D 01 53 31 6E 0D 01 53 31 6E 0D 01 53 31 6E 0D 01 53 31 6E
I do a code to generate the same by arduino but it doesn’t work.
To debug, I connect arduino to my PC, launch hyperterminal and record trace:
hypertrm.exe IRP_MJ_READ Serial0 TIMEOUT Length 8: 0D 01 53 31 6E 0D 01 53
hypertrm.exe IRP_MJ_READ Serial0 TIMEOUT Length 8: 31 6E 0D 01 53 31 6E 0D
hypertrm.exe IRP_MJ_READ Serial0 TIMEOUT Length 4: 01 53 31 6E

Why K8056 can’t detect this string ?

Thanks for your help

2

Make sure baudrate and settings are correct.
Make sure time between two code strings is correct.
Make sure code strings are repeated the required number of times.

3

Hello,
Thanks for your reply but the baudrate is OK, the test code is the following to switch the first relay is the follwing:

void setup()
{
Serial.begin(2400);
}

int relayon[] = {13, 01, 83, 49, 110, 13, 01, 83, 49, 110, 13, 01, 83, 49,
110, 13, 01, 83, 49, 110};
int i;
void loop()
{
for (i = 0; i < 20; i = i+1) {
Serial.print(relayon[i],BYTE);
delay (5);
}
delay (5000);
}

4

Sorry, we are not familiar with this programming language.