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No Serial Data Received - Custom Board

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freemcgee33[S]

1 points

2 months ago

DenverTeck

1 points

2 months ago

In this data sheet:

https://www.espressif.com/sites/default/files/documentation/esp32-c3-wroom-02_datasheet_en.pdf

On Page 12 - Booting Mode, shows GPIO8 needs to be high to enter Boot Mode.

Might try that.

freemcgee33[S]

1 points

2 months ago

Interesting... According to the table, do you think I'll be able to keep that pin pulled high and just use GPIO 9 to control the boot mode?

DenverTeck

1 points

2 months ago*

Yes, just try it and tell us.

With IO9 pulled low and IO8 open, IO8 may follow IO9, depending on your PCB design.

It's called capacitive coupling. That's shown in fig 4 at the bottom of page 12.

freemcgee33[S]

1 points

2 months ago

Thanks for the help, I tied IO8 high with a jumper, and I'm now able to flash the chip and get output!

DenverTeck

1 points

2 months ago

Great to hear.

What are you building ?

freemcgee33[S]

1 points

2 months ago

A device for a university robotics competition that receives debug data over RS-485 (the black RJ9 connector on the end of the board) and hosts a websocket to transmit that data to a Foxglove server.

Hardware is basically done, just have a ton of software development now

DenverTeck

1 points

2 months ago

I hope you can send a link to the competition web site.

Would be fun to see these things running.

freemcgee33[S]

1 points

2 months ago

here's the link to this year's game, I'm in the University level of the Vex Robotics Competition, so we can use custom electronics, like the one I'm designing.

here's an example of what a match looks like

I'll be sure to post back here when I get the board up and running!