ESP32-S3FH4R2 I also had the WiFi AP scanning and showing a list of available networks, but could not connect. Also when ESP32-S3-Zero was set in WiFi AP mode (downloaded firmware to the AP and web server), when scanning available WiFi networks, it was not visible either. On the working board, the ceramic antenna was installed differently. |||||. On the non-working antenna, the position was like this ////. The white bar shows where the antenna connector is. On the working board, the threads on the ceramic antenna, the stripes were at right angles to the board, on the not working were at acute degrees. Just flipped the antenna 180 degrees along the length of the antenna. The contacts remained there, the white stripe on the same place of soldering, but the stripe was already under the antenna. I put the stripes as on the working board, at right angles and parallel to the sides of the board, everything worked. I put the antenna in this position |||||. PS. On a side note, if everything works as it should, but there are problems with the transmission signal. The board was fully functional both software and hardware. The only problem was with the position of the antenna.