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Sorry, missed that. Thank you again PhillipH

Further to my entry dated sun 13 Apr on the mlink 4x4 keypad product specific forum, I have amended the sketch as suggested. I trust I have put the byte = 255 line in the right place and have added the last break statement. The problem still remains. The selected relay cycles through On and Off cont...

I am happy to say your solution is now working well but is identifying a problem with the receiving slave sketch: copy below. When the Route 1 is selected, the relay cycles continuously between open and closed and only stops when Route 2 is selected, when it's relay cycles continuously. The serial m...

Thank you. I'll give that a try. PhillipH

Being something of a newbie, I am having problems developing the sketch further. I wish to read each two digit input and execute the action I require for that input e.g if(value = 1){ Serial.printLn("Route 1"); //carry out action for Route 1 } if (value = 2){ Serial.printLn("Route 2"); //carry out a...

Thank you for your prompt reply. It works nicely PhillipH

Beyond the Tutorial I have purchased a mlink 4x4 matrix keyboard with the intention of using it to replace 37 route selection switches with double digit keystrokes 01 - 37. I have found no examples or tutorials that show a sketch that identifies double keystrokes. Can anyone render assistance. Many...