I have a wemos d1 mini pro that the works fine if plugged in to the serial cable port(mini usb). Connects and I can access it with no issue. However, if I connect it via 5v to the 5v and ground pins, the blue light will flash on and off, but it never connects? Is this not an input pin? If it is not …

Definitely sounds like a problem with your 5V power supply. What can you tell us about that? Might be worth trying a large cap, e.g. 100uF+, to the 5V pin close to the Wemos.

Wemos d1 mini pro will not connect when powered via 5v pin

Projects General Guidance

Paul_B November 11, 2021, 9:31pm 15

That is indeed what I am thinking.

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Wemos d1 mini pro will not connect when powered via 5v pin

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