Hi, i was wrote a one simple program for relay toggle and see the relay toggle count value in the I2C display. code working perfectly. but i am facing a small problem. once i am pressing a start button program starts to running and display shows the value correctly. after particular time period my I2C display shows some invalid data. how to i fix this problem. i hava attached the image below.
Possibly electrical noise from the relay is causing interference on that display. Show a full picture of your setup. The effect you are seeing is common on those displays. Each data item is sent as two 4 byte chunks and these get mixed up if some interference cause the display to lose synchronisation.
What value of Pull Up resistors did you use. I find that if I set the resistance for about 1mA it works nicely. You can also use a solid state relay.
Dear sir / madam, i only using internal pullup. i am not add any external pullup resistors. after that issue i was restart the program, till now no issues occurs like that. still, it is running.
Great, I am glad it is working. I did not recommend the internal pull ups as they are very week. If the problem returns add the external parts.
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