LCD Serial Backpack Problems

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1

Hello,

I just purchased these two items and connected them:

(1) Screen, LCD-00710 http://www.sparkfun.com/commerce/produc … cts_id=710

(2) Backpack, LCD-09352 http://www.sparkfun.com/commerce/produc … ts_id=9352

I have this connected to a notebook computer via USB/Serial dongle, with the port set to 115200, 8, 1, N (per the backpack documentation). When I send a character via terminal emulator or custom serial program, the screen responds immediately, but it displays the wrong character. For example, the letter “A” is displayed as an underscore “_”. I’m unable to send control commands this way because my data isn’t being interpreted properly.

Can anyone provide any additional information on how to proceed? Thanks!

2

Looking at the schematic, it wants TTL-level serial, not RS232 level. Hope it didn’t get fried (good chance it’s OK since those dongles tend to be wimpy).

Try using a USB-TTL level serial dongle (such as BOB-00718) instead.

/mike

3

OK, thanks! Will give that a try.