2

I have an Arduino Uno I need to connect to Wi-Fi to make HTTP POST Requests to a Raspberry Pi Web Server.

The Arduino is located only about 30 feet from the AP, but there is a brick wall in the line of sight, and it is in a metal outdoor enclosure. For that reason, I wanted to attach an external Wi-Fi Antenna which would stick out a sealed hole in the enclosure.

I was contemplating using an ESP8266 Wi-Fi module, but it does not look like there is an easy way to attach the antenna.

What would be the best Wi-Fi module to which I could attach an external antenna for an Arduino Uno?

  • robotdyn.com/wifi-d1-mini-esp8266-dev-board-usb-cp2104.html do you see the antenna connector? – Juraj Oct 23 '18 at 7:09
  • @Juraj Thanks. That might be a better option. It's a lot more self-contained, it's cleaner, and I won't need a load level converter. – Jamie Corkhill Oct 23 '18 at 13:49
  • the same in Uno format robotdyn.com/wifi-d1-r2-esp8266-dev-board-32m-flash.html. but I can't recommend it. both, the on-board antenna and the connector are connected. I think, it causes problems and there are no instructions how to cut connection to one of them – Juraj Oct 23 '18 at 13:57
  • on the mini version the external antenna connector is not connected. you would need to re-solder the 0 ohm 'resistor' that connects the on-board antenna to soldering points connecting the external antenna connector – Juraj Oct 23 '18 at 14:04
2

There are variants of ESP8266-based modules which include a connection for an external antenna. The ESP-02, ESP-05 and ESP-07 modules all feature a U.FL socket.

Effectively, they are an ESP8266 mounted on a carrier board with a U.FL socket.

If you already have some code to suit an ESP8266-based module, this will avoid having to rewrite for a different unit.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.