Home › Forum › Support › A3 HW105 WiFi – Device ID 82600374 – firmware request (no hotspot, 3 beeps)

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  • May 5, 2026 at 11:59 am #30206
    Adam
    Participant

    I have a uRADMonitor A3 HW105 WiFi unit with Device ID 82600374 that will not create the temporary WiFi hotspot and is stuck in the repeating 3-beep error (network failure).

    The device powers on and beeps once, then after a short time beeps three times repeatedly.
    No “uRADMonitor-74” (or similar) access point ever appears, even when scanned right next to the unit.
    There is no exposed USB port (older HW105 board).
    I have opened the case and the ISP 6PIN programming header is clearly visible and accessible.

    I am ready to re-flash the firmware using a USBasp AVR programmer (3.3V) and avrdude. Could you please send me the correct device-specific firmware file (uradmonitor-A3-82600374.hex or the latest version with my ID embedded)?
    Any additional instructions or the exact pinout for the ISP header would be greatly appreciated.
    Thank you very much — I’m happy to provide any other details or photos if needed.
    Best regards,
    Adam Beasley

    May 10, 2026 at 12:29 pm #30223
    uRADMonitor
    Keymaster

    That might have to do with the network module, a little board based on an esp8266.

    Can you take out the front lid and inspect the esp8266 module? Look at the soldering, any corrosion signs, etc.

    I can help yuo with the firmware update, but I’m afraid it won’t fix it.

    May 10, 2026 at 8:01 pm #30224
    Adam
    Participant

    I didn’t see any corrosion or broken solder joints; I reflowed it just in case and got the same result. Is it possible to buy a replacement board? I’ve search around but could not find a provider that had some in stock. Are there any alternatives?

    I would like to at least attempt to flash it rather than just let it go to waste, so any firmware would be greatly appreciated.

    Thanks,

    Adam

    May 10, 2026 at 8:27 pm #30225
    Adam
    Participant

    Follow-up question: If I do manage to find a new ESP-04 board, will the AVR flash it automatically or will it need to be done manually?

    Thanks,

    Adam

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