Hi, I have an ESP32 project where I am able to connect to wifi and access internet. However, if I hotspot to a Portable wifi router, it connects to the hotspot but no internet. I can connect a PC or a phone to that same hotspot and no issues. The Portable wifi router is (LTE CAT6/Supersoftware H80…

Try these basic steps. Set your router to 2.4ghz only and set manually channel (for example 6). On esp32 code give static ip address, and manually set gateway, sub and dns. (verify your gateway and subnet with another device that successfully connects). IPAddress local_IP(192, 168, 1, 200); // u…

That's so strange. It's like the router is blocking outside internet access to the ESP32.. until it sees something from the device? Maybe it's waiting for some sort of packet, that's usually sent by other devices / operating systems but not the ESP32? I think only the manufacturer of the router can…

[image] maxgerhardt: I think only the manufacturer of the router can help you at this point. That sounds challenging ... :wink:

Hi @tfamith , Welcome to the forum.. [image] tfamith: Response: Request failed. Url: http://api.ipify.org httpCode: -1 connection refused looks like your insecure connection was refused, maybe you need to try https.. good luck.. ~q

would look in this direction - What is the default packet length for TCP/IP?  Please go to menuconfig > Component config > LWIP > TCP > Maximum Segment Size (MSS) for the length.

I tried both http and https, but still the same issue. Actually, we are also trying the ping with no luck.

In the settings, I cannot see any settings which I can change the frequency to 2.4ghz. So I am assuming it supports only 2.4.

ESP32 + LTE 5G ROUTER No Internet

Projects Networking, Protocols, and Devices

tfamith October 6, 2025, 3:53am 13

It only comes with 2.4G
Setting the config did not work either.

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ESP32 + LTE 5G ROUTER No Internet

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