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Sure you think the LCD should be displaying something. Insert a small flat screwdriver into the potentiometer, and turn.
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This is located to the left of the LCD on the main board on Question: My LCD is hard to read / can only be read from an angle / displays nothing at all.Īnswer: Adjust the contrast control on the board. Follow the directions displayed on the LCD to test the device. For full testing, you need to have the send and receive of the UART/RS232 port connected together, and the IR and UART jumpers inserted. AVR gcc Test Code - This code can be used with AVR gcc to test all of the functions of the mega128.1 board.
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