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Heltech V4 Touch - Can't connect to node over TCP - Connection Refused #218

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Heltech V4 Touch - Can't connect to node over TCP - Connection Refused#218

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@tangles-0
tangles-0
opened on Jan 20, 2026

Trying with firmware: firmware-heltec-v4-tft-2.7.15.567b8ea.bin and then firmware-heltec-v4-tft-2.7.17.9058cce.factory.bin

I can see the WiFi IP on the device's display, and MQTT is reporting my node to the map, but connecting to the node in my browser returns "Connection Refused" immediately. With the node switched off it times out, so this isn't a mistake like firewalls or being on the wrong LAN. I've erased and reflashed the device - same result, as well as factory reset through the MUI. No messages are printed to the serial console when trying to connect.

I've tried with a totally different AP (2.4ghz only) - same result.

Activity

  1. yunhao-jiang commented on May 11, 2026

    @yunhao-jiang
    yunhao-jiang
    on May 11, 2026

    According to their official doc

    In the "Settings" option of MUI, you can find a "WiFi" option where you can enter WiFi information. However, this WiFi can only be used for MQTT data upload and Cannot be used for connecting to the mobile app.

    However, you can switch to the original Base UI instead of MUI, and that could work with TCP, http, and bluetooth.

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