Matrix Orbital Corp

Hi,

I have an LK202-25-USB and I'm trying to interface it via an Arduino Uno R3. When I plug the board straight into my computer I can easily communicate over USB, but I want to use the Arduino for some portability. I'm powering the screen via the +5V and GND pins from the Arduino to the corresponding Alternate Power connector pins on the screen.

I'm trying to communicate to the screen using a USB breakout cable and Arduino's SoftwareSerial library. Is there a better library for communicating over serial? Should I use the Rx and Tx pins on the DB9 headers instead? Are there other (maybe better?) ways to communicate with this screen? I'm familiar with I2C and the Arduino Wire library. If I wanted to use I2C, where are the SDA and SCL lines on the PCB?

Solutions I've already tried:
- checked continuity of cable
- set all baud rates to default 19200 bps

Dave

Hi Dave,

Unfortunately, the LK202-25-USB is USB only and does not have the capability to be converted to serial.

In order to accomplish what you are trying to do, you will have to either:

1. Have a transceiver from your Arduino UNO which will have to convert the data coming from the UNO from TTL to USB which the display is in.
or
2. Purchase the serial version of the display.

If you have any other questions or concerns please feel free to ask,
Thank you,
Martino