Re: Caveat Emptor!
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Do you have the correct I2C address for the displays? You might check that. See:
From: Arv Evans <arvid.evans@...>
Sent: Friday, January 26, 2018 3:08 PM
Subject: Re: [BITX20] Caveat Emptor!
My experience with high density displays is not any better. I have 5 of the small 0.92 inch
displays but have not been able to get any of them to work. These are TWI or I2C interface
and my Arduino does not recognize any. I have tried the example code, the TWI address search
code, and my own TWI interface code, all to no avail. At present I seem to be limited to using
the old standard 1602 LCDs, 4-line 16 char LCDs, and using the ttl/USB interface to show Arduino
outputs on my PC.
Given my non-success experience with the 0.92 inch screens I have been hesitant to invest in
larger wire-bus connected displays. Your experience seems to say it is good that I have not
purchased larger displays.
I wonder who, if anybody, has had good luck with these type screens? The wire.h library
seems straight-forward and easy to use, but it just does not work with displays I have tried.
I even used the example code without making any modifications and it still doesn't work.
On Fri, Jan 26, 2018 at 12:47 PM, John P <j.m.price@...> wrote:
I just received 3 of the MCUFriend 3.5" TFT displays purchased from "accecity2006" on eBay. One of the 3 worked correctly; one was cracked and another one was not displaying text correctly.