Its using a JOHNSON 2450AT43B100 antenna, and the ESP32-C3FH4 chip.
- espScreenshot 2023-01-23 154504.jpg (164.29 KiB) Viewed 2565 times
- schemeespScreenshot 2023-01-23 154504.jpg (289.8 KiB) Viewed 2565 times
The errors are always: 202 AUTH_FAIL or AUTH EXPIRED.
Even putting the ESP on top of my phone set up as a AP could not get any connection (-30dBm)
I also set it up as a AP, the pc can see the AP but cant connect.
So after testing different software, i decided to move on to hardware, first i tried to remove the antenna and connect a piece of wire after ti Pi network, nothing, after that, i connected the wire before the pi network. still nothing, but i could see the RSSI got stronger, i also realized the wire was too long, so i started cutting of pieces of the wire looking to see if the RSSI got stronger, it did!
After that i have had no problems connecting to wifi with the wire as an antenna (connected before the pi network)
So my best guess is that its the PI matching network that needs tuning, and that i should get an VNA to get the proper antenna working
But i don't wanna waste money on a VNA if thee could be another way or something else i could try?
The fact that two Pcbs have worked for a while is still strange, but i might not realize how much the environment might affect RF stuff?
also, I'm not planning on using the wire in the product of course, but could i damage the esp when using a wire as antenna?, i heard the esp could take damaged without an antenna?