Hello,
A couple of weeks ago i bought the k8056 relais board and assembled it according the manual.
Everything is working fine when using the test button, all the relais are switching 1 by 1 correctly.
But, when i try to use the example software from the velleman website to switch the relais over rs232 there is no reaction at all.
I checked all the power circuits and they seem ok, i checked the PIN 4 on the PIC to see if the data i sent is actually being received by the PIC, and also this was OK, i don’t know what else to check, the correct data is arriving on PIN 4 of the PIC and all the circuits are OK, but the data led stays off and there is no reaction at all.
What could be the problem?