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1602 LCD No characters displaying

I've got an older version of this board and I can not get the LCD to display characters with the sample code.
Am i missing something or is the pin layout different on the older models?
Thanks,
Am i missing something or is the pin layout different on the older models?
Thanks,
2018-06-13 21:56:24 Did you follow the wiki steps and you said it is an old version, is it like the one on product page? https://www.dfrobot.com/product-51.html
robert.chen
