PCB layout Guide for ESP32-­WROVER-­E from Espressif

ESP32-WROVER-E from Espressif is a powerful, generic Wi-Fi + Bluetooth + Bluetooth LE MCU modules that target a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music streaming and MP3 decoding. ESP32-WROVER-E comes with a PCB antenna. Is there any PCB layout document or other design resource you can follow to design the ESP32-WROVER-E into your application?

ESP32 PCB layout [source from: ESP32 Hardware Design Guide]

The ESP32-WROVER-E’s datasheet and its hardware design guidelines give some good advice on module placement positions.

Please note that there is no PCB layout advice for when you use a module instead of a bare chip, as generally it doesn’t matter much: the entire idea of a module is that all the critical layout is inside the module, leaving you free to route the module pins however you need to. With the one exception mentioned in the design guidelines that the antenna has a keep-out area as well as a preferred location you should observe.

In the datasheet, it shows some additional external capacitors even though the module has all necessary components internally. The ESP32 can be a very spikey load and if you don’t have capacitors close to the power pads of the WROVER, you’re relying on the inductance of the traces and the specs of your LDO to not cause a brownout during intensive Wi-Fi operations.