Custom ESP8266 Board unable to connect

At least one: the antenna from the ESP is perfectly shielded. Check the design guides for an ESP PCB design.

Stephan B. wrote:

Any help is gratefully appreciated.

Usually it first time operation doesn't work the way "switch the power on and all runs ok". Instead you must do it stepwise:

1. apply supply voltage
2. measure the supply voltages on the devices supply pins
3. bridge rx and tx at the CH340 and check it with a terminal programm
4. ....
5. ..

Any help is gratefully appreciated.

The pins in good readable schematic symbols are not sorted in the package order. Instead they represent the function of the device: inputs right, outputs left, supply top and bottom. Simply have a look at other good readable schematics. Compared to them yours looks a little bit like the scribbling of an kindergarten child.

J. S. wrote:

the antenna from the ESP is perfectly shielded.

First thing is to read the data sheet and second is to have a close look on other boards.

Thank you, for your recommendations. Currently I am not having an error connecting to it wirelessly, I habe trouble uploading a sketch, I get the feedback that it failed to establish a connection. Also, when it tries to connect, the builtin LED blinks for 10ms or so and then goes dark for another 2s.

And yes, I know the design isn't really good, since it is my first ever ESP32 custom PCB _:) I am just trying to get this to work, so I can install WLED to it, then I can improve my design and do a 2. Rev

Thank you very much for providing that Link, it helped me a lot! I was copying the D1 mini schematic, but it seems like, I have made some mistakes... I have now corrected it according to your instructions. (Find the photo in the attachment) Are there any other flaws?

Yes that is on purpose. To that board you can connect a 5V ARGB as well as up to a 24V RGBW LED Strip (not at the same time of course).

Ensure correct wiring, boot mode, and drivers. Try another USB cable.

If you're having trouble uploading sketches to your ESP8266 board, ensure the USB-to-serial converter (TX-RX swapped) is properly connected, drivers are installed, and GPIO0 is pulled low during reset. Use a stable 500mA power supply, keep the antenna area clear, and compare your design with Wemos D1 Mini. If using the THGBMNG5D1LBAIL eMMC module which you can find https://www.xecor.com/product/thgbmng5d1lbail here, verify correct integration, as improper connections may affect functionality.

Thank you so much for sharing.

I have now changed my design and built the new PCBs, but the issue is the same, when I try to connect and flash the blink sketch with Arduino IDE to the ESP, the led just flashes a few times as like it is resetting and then the Console tells me, it is unable to connect to the device. For Programming I am using the LOLIN D1 mini for the board and I have correctly installed the CH340 Drivers, I also tried six different USB cables and the GPIO0 is effectively tied to ground when trying to flash. I attached my design, if anyone wants to thinker with it, have a go, and let me know if you find out anything useful. I am not able to find out what it is... I am redesigning the PCB to use a already built microcontroller board, I am thinking of the XIAO ESP32, since building you own ESP seems to be rather unnecessary complicated. Thank you very much for every help provided to this point.