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ESP8266 LED display

Posted on Thursday, September 24th, 2015 in LEDs, wireless by DP

IMG_20150622_230943

Evan writes:

This is my proof-of-concept for using mqtt with the esp8266.  I saw this LED display sitting around and I couldn’t imagine why no one was using it, the answer was no one knew how to talk to it.  Easy, I think.  Looking at the board it’s just an 8031, a serial level shifter, and a bunch of display-centric parts.  The pile of capacitors around the max232 equivalent was the give-away.  capacitors external to the chip are needed in the voltage boosting/negative voltage generation circuits for rs232 levels (until recently, I hear someone put them on-die).  Tracing those signals is easy and I found they went to UART pins on the 8031.

Details at Evan’s Techie-blog.

This entry was posted on Thursday, September 24th, 2015 at 1:12 pm and is filed under LEDs, wireless. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

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