Review of an ESP32 project schematic

[LarryD]

Going to make some ESP32 project boards.

Trying to cover future project needs by incorporating several options into a PCB.

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If you have time, please add comments.

• Each GPIO will be connected to a header pin that is inline with 3.3V and GND.
• GPIOs have the option of adding a series resistor before it goes to the header pin.
• 3 power input options and the option of 3.3V switching power to sensors.
• External sensor can trigger power on. The ESP will do its stuff then turn off the power.

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Question:
Was considering to add an antenna jack. You would cut the onboard antenna trace then wire the ESP32 antenna output to this jack.

Has anyone had success with doing this on an ESP-WROOM-32 raw board ?

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Edit:
Final updated schematic.

[gilshultz]

Nice Schematic! Overall it looks very good. I would suggest adding some bypass capacitors. Consider using something in the 3K range for the I2C pullup connections. It should work from what I can see. I did not check the required port state of the Micro for reset. D3 is a good idea and will probably save you some chips. You might consider placing a SMD fuse to prevent catastrophic failure if the power is reversed and D3 fails. That way you will know if it was mis applied.

[LarryD]

Out for Manufacturing.

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[Paul_B]

@LarryD

Was considering to add an antenna jack. You would cut the onboard antenna trace then wire the ESP32 antenna output to this jack.

Sounds dodgy. That puts you into microwave stripline design. I don't think you want to go there - recent thread on the topic.

[Wawa]

The ESP32-S has an aerial connector.
Leo..