ESP32 Forum

Posted: **Fri Sep 20, 2019 8:58 am**

Hello all,

I have tested both the on antenna version ESP-WROOM-02 and the external antenna version ESP-WROOM-02U.

How is it possible the pcb antenna version (ESP-WROO-02) is more successful than external antenna version(ESP-WROOM-02U) in terms of connectivity?

I have applied AT+RFPOWER=82 for both modules and the same test which consists same access points for the internet and same servers.

I have attached the suggested antenna and realized that the on pcb antenna module has a better connectivity.

Any help is appreciated

Kind Regards

Posted: **Fri Sep 20, 2019 10:28 am**

Did you force calibration with antenna attached by erasing flash or setting always calibrate mode?

Posted: **Fri Sep 20, 2019 10:46 am**

No, I didn't.

Posted: **Fri Sep 20, 2019 1:37 pm**

Wroom-02 uses esp8266 so go here for support https://bbs.espressif.com/

ESP32 Forum

How is it possible the on pcb antenna version (WROOM02) connects better than the external antenna version (WROOM02U)?

How is it possible the on pcb antenna version (WROOM02) connects better than the external antenna version (WROOM02U)?

Re: How is it possible the on pcb antenna version (WROOM02) connects better than the external antenna version (WROOM02U)

Re: How is it possible the on pcb antenna version (WROOM02) connects better than the external antenna version (WROOM02U)

Re: How is it possible the on pcb antenna version (WROOM02) connects better than the external antenna version (WROOM02U)