The maximum tested transmission power is achieved through chip's matching network, connected to a spectrum analyzer using a coaxial cable. This is known as conducted testing.

Production RF testing, on the other hand, involves connecting the module to a spectrum analyzer using a coaxial cable to measure the conducted power. This is done by contacting the test probes with the ANT pins.

In an office environment, the measured AT Wi-Fi connection time is 5 seconds.

 However, in practical usage, Wi-Fi connection time depends on various factors, including router performance, network conditions, module antenna performance, and more.

You can set it by invoking the AT+BLESCANRSPDATA command.

You can configure this using the AT+SYSMSG command. You can set it with AT+SYSMSG=4. If the connected hotspot disconnects, the serial port will report "WIFI DISCONNECT\r\n".

Yes, it's possible. The ESP32 shares a single antenna for both Wi-Fi and Bluetooth LE, and you can configure it using the AT+RFPOWER command.

ESP-AT currently does not support ESP-WIFI-MESH.

When the main MCU sends AT commands to the ESP32 device, it is necessary to include an end-of-line character. The correct format in the program is "AT\r\n." You can refer to this for verifying whether the AT firmware has been successfully flashed.