ESP32-C3-13 external antenna

ogedik
Posts: 35
Joined: Wed Jun 28, 2023 8:32 pm

ESP32-C3-13 external antenna

Postby ogedik » Tue Mar 12, 2024 6:22 pm

Hi,

I am using ESP-NOW to communicate two ESP circuits. My aim is to get more gain trying to attach external antenna to AiThinker ESP-C3-13 Node MCU kit. Module is coming not soldered male interface on board. Therefore I soldered an IPEX connector to board. After the soldering connector I attached the external antenna to the board but nothing changed. Still same dbi and no extra gain.

Has ESP-C3-13 a trick like ESP32-CAM (https://randomnerdtutorials.com/esp32-c ... al-antenna) to enable external antenna instead of on-board one?

As an additional information; I tested short-circut positive and negative pins of IPEX connector without attaching an antenna. Then found out they are touching each other at some where. It is same on brand new board to. Is it normal?

Please find my part attached to the message.

Thank you for your helps.

Orkun Gedik
Attachments
IMG_1719.jpg
IMG_1719.jpg (1.8 MiB) Viewed 2391 times
thumbnail_IMG_1720.jpg
thumbnail_IMG_1720.jpg (780.88 KiB) Viewed 2391 times

liaifat85
Posts: 200
Joined: Wed Dec 06, 2023 2:46 pm

Re: ESP32-C3-13 external antenna

Postby liaifat85 » Wed Mar 13, 2024 2:07 pm

Sounds like a manufacturing defect or an error with the soldering.

MicroController
Posts: 1688
Joined: Mon Oct 17, 2022 7:38 pm
Location: Europe, Germany

Re: ESP32-C3-13 external antenna

Postby MicroController » Thu Mar 14, 2024 11:18 pm

You seem to have the ESP-C3-13 module, which comes with a PCB antenna. To connect an external antenna, you will have to somehow 'disconnect' the PCB antenna, and probably modify the matching network to be compatible with your external antenna.

Or, get an ESP-C3-13U.
I tested short-circut positive and negative pins of IPEX connector without attaching an antenna. Then found out they are touching each other at some where. It is same on brand new board to. Is it normal?
May be. Some PIFA designs for example are grounded at one end.

ogedik
Posts: 35
Joined: Wed Jun 28, 2023 8:32 pm

Re: ESP32-C3-13 external antenna

Postby ogedik » Fri Mar 15, 2024 5:50 am

MicroController wrote:
Thu Mar 14, 2024 11:18 pm
You seem to have the ESP-C3-13 module, which comes with a PCB antenna. To connect an external antenna, you will have to somehow 'disconnect' the PCB antenna, and probably modify the matching network to be compatible with your external antenna.

Or, get an ESP-C3-13U.
I tested short-circut positive and negative pins of IPEX connector without attaching an antenna. Then found out they are touching each other at some where. It is same on brand new board to. Is it normal?
May be. Some PIFA designs for example are grounded at one end.
Since I didn't not want to broke my PCB board I didn't touch it so far :) I will try to disconnect PCB antenna and write here the result.

Thank you.

Orkun Gedik

ogedik
Posts: 35
Joined: Wed Jun 28, 2023 8:32 pm

Re: ESP32-C3-13 external antenna

Postby ogedik » Fri Mar 15, 2024 6:19 am

liaifat85 wrote:
Wed Mar 13, 2024 2:07 pm
Sounds like a manufacturing defect or an error with the soldering.
I checked soldering and it is looking fine. But maybe its default design.

ZdenekCh
Posts: 1
Joined: Thu Aug 01, 2024 6:40 pm

Re: ESP32-C3-13 external antenna

Postby ZdenekCh » Thu Aug 01, 2024 7:00 pm

Hallo, I believe you should remove the marked resistor.
ESP-C3-13.png
ESP-C3-13.png (1.73 MiB) Viewed 1069 times

Who is online

Users browsing this forum: No registered users and 54 guests