WIFI: distance to router / ERSP32 development board

[arjfca]

Hello

First post on this forum. I'm looking to select a ESP32 develpment board but can't find the information.

I want to create a temperature controller for my BBQ that would be linked to the Internet. The device would be located outside about 40 meters to the home wifi router. I had no so good experience with an WIFI add-on for an Arduino board in the past.

My interogation is what is a reasonable distance from the device to the router to have a stable connection using the onboard antenna? Should I select a development board with an external antenna? The board won't be in a direct line view to the router.

I am an amateur with these device and, English is not my first language so please excuse me if the question is either badly asked or irrelevent...

Martin T.
(Montreal, Canada)

[Spile2]

My experience of the ESP32 is that Wi-fi performance is inferior to that obtained by using a smartphone.