# Updated of AMB82-mini board breaks working code

**URL:** <https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670>\
**Category:** SDK\
**Created:** [January 26, 2026, 2:21am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670 "2026-01-26T02:21:48Z")\
**Posts on this page:** 16\
**Page:** 1

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**Author:** ![Barryn56](https://avatars.discourse-cdn.com/v4/letter/b/8491ac/32.png) [@Barryn56](https://forum.amebaiot.com/u/Barryn56)\
**Post date:** [January 26, 2026, 2:21am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/1 "2026-01-26T02:21:48Z")

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Hello. I have been having trouble with the latest updates, starting somewhere around 4.1.20251219, that causes the application to fail with error CH 0 MMF ENC Queue full, and consequent video corruption. Also, the whole interface is very slow to react in general. Version 4.1.20250911 still works fine, with high response and no errors. Interested to know what has caused this.

Regards,

Barry

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**Author:** ![Pammy](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/pammy/32/936_2.png) [@Pammy](https://forum.amebaiot.com/u/Pammy)\
**Post date:** [January 26, 2026, 4:02am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/2 "2026-01-26T04:02:43Z")

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Hi @Barryn56

Could you try again with the latest version 4.1.0-build20260123? Some video streaming bugs have been fixed.

> **[GitHub - Ameba-AIoT/ameba-arduino-pro2: AmebaPro2 Arduino third-party package SDK](https://github.com/Ameba-AIoT/ameba-arduino-pro2)**
>
> AmebaPro2 Arduino third-party package SDK

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<div class="post-metadata">

**Author:** ![Barryn56](https://avatars.discourse-cdn.com/v4/letter/b/8491ac/32.png) [@Barryn56](https://forum.amebaiot.com/u/Barryn56)\
**Post date:** [January 26, 2026, 7:18am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/3 "2026-01-26T07:18:38Z")

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Hi Pammy, no - same issue. I will install each board at a time and test to see when the issue originally arrived and let you know. My app uses HTTP to stream video to a phone over wifi, so I think it has something to do with the wifi side of things. Regards, Barry

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**Author:** ![Barryn56](https://avatars.discourse-cdn.com/v4/letter/b/8491ac/32.png) [@Barryn56](https://forum.amebaiot.com/u/Barryn56)\
**Post date:** [January 26, 2026, 7:51am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/4 "2026-01-26T07:51:57Z")

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Hi Pammy, so the problem occurred after the update to 20250911. This version works fine, and the next version, 20250924 has the problem. Is there a listing of changes somewhere?

Regards,

Barry

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**Author:** ![Pammy](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/pammy/32/936_2.png) [@Pammy](https://forum.amebaiot.com/u/Pammy)\
**Post date:** [January 26, 2026, 8:47am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/5 "2026-01-26T08:47:37Z")

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Hi @Barryn56 ,

All the changes are listed under these tags: [Tags · Ameba-AIoT/ameba-arduino-pro2 · GitHub](https://github.com/Ameba-AIoT/ameba-arduino-pro2/tags).

For 24 Sep version, it is under [V4.1.0-QC-V02](https://github.com/Ameba-AIoT/ameba-arduino-pro2/releases/tag/V4.1.0-QC-V02)

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<div class="post-metadata">

**Author:** ![Barryn56](https://avatars.discourse-cdn.com/v4/letter/b/8491ac/32.png) [@Barryn56](https://forum.amebaiot.com/u/Barryn56)\
**Post date:** [January 26, 2026, 9:12am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/6 "2026-01-26T09:12:11Z")

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> [@Barryn56](#):
>
> CH 0 MMF ENC Queue full,

OK, so lwip\_send was changed, so this is the likely issue, as wi-fi bandwidth is not the issue. Possibly there’s a queue not being flushed??

Regards,

Barry

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<div class="post-metadata">

**Author:** ![Pammy](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/pammy/32/936_2.png) [@Pammy](https://forum.amebaiot.com/u/Pammy)\
**Post date:** [January 27, 2026, 10:13am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/7 "2026-01-27T10:13:04Z")

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Hi @Barryn56 ,

Could you try modifying `ard_socket.c` by updating the `send_data` API to use the following implementation and check whether the performance returns to normal?

```auto
int send_data(int sock, const uint8_t *data, uint32_t len, int flag)
{
#if 1
    int ret;
    ret = lwip_send(sock, data, len, flag);
    return ret;
#else

// 1 TCP segment (1460 MSS size)
#define CHUNK_SIZE 512
    size_t offset = 0;
    ssize_t sent = 0;
    ssize_t total_sent = 0;
    size_t remaining, to_send;

    while (offset < len) {
        remaining = len - offset;
        to_send = remaining > CHUNK_SIZE ? CHUNK_SIZE : remaining;

        sent = lwip_send(sock, data + offset, to_send, 0);

        if (sent > 0) {
            offset += sent;
            total_sent += sent;
            sys_msleep(1);

        } else if (sent < 0 && (errno == EWOULDBLOCK || errno == EAGAIN)) {
            // socket not ready, wait for writable
            fd_set wfds;
            FD_ZERO(&wfds);
            FD_SET(sock, &wfds);

            // 20ms wait
            struct timeval tv = {0, 20000};
            int ret = lwip_select(sock + 1, NULL, &wfds, NULL, &tv);
            if (ret <= 0) {
                // timeout or error, retry
                continue;
            }
        } else {
            // real error
            return -1;
        }
    }
    // success
    return total_sent;
#endif
}

```

Thank you

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<div class="post-metadata">

**Author:** ![Barryn56](https://avatars.discourse-cdn.com/v4/letter/b/8491ac/32.png) [@Barryn56](https://forum.amebaiot.com/u/Barryn56)\
**Post date:** [January 27, 2026, 11:09am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/8 "2026-01-27T11:09:26Z")

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Hi Pammy, yes - that’s stopped the error, though I notice that there’s a slight pause in the live streaming every few seconds, noticeable when moving the camera - maybe half a second the picture freezes, then ‘catches up’. I used the latest version of the board firmware. The other operations’ responsiveness are also back to normal.

Regards, Barry

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<div class="post-metadata">

**Author:** ![Barryn56](https://avatars.discourse-cdn.com/v4/letter/b/8491ac/32.png) [@Barryn56](https://forum.amebaiot.com/u/Barryn56)\
**Post date:** [January 27, 2026, 12:33pm UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/9 "2026-01-27T12:33:01Z")

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Hi Pammy, so going back to 20250911, I notice that delay is less, but is still there, and likely due to the skb buffer reaching a limit under live streaming ([Driver]: skb\_unavailable=1 in last 2 seconds). Can this be easily expanded or do you recommend switching to TCP, for example? Regards, Barry

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<div class="post-metadata">

**Author:** ![Barryn56](https://avatars.discourse-cdn.com/v4/letter/b/8491ac/32.png) [@Barryn56](https://forum.amebaiot.com/u/Barryn56)\
**Post date:** [January 27, 2026, 1:09pm UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/10 "2026-01-27T13:09:04Z")

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OK - update. I was using an extension cable to go to the camera. When I removed that, and connected directly, the message about the skb\_unavailable=1 in last 2 seconds has gone BUT the slight jitter remains, indicating it was not due to the buffer message. With this earlier board, the jitter is less than with the latest one (and updated ard\_socket file). Regards, Barry

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<div class="post-metadata">

**Author:** ![Barryn56](https://avatars.discourse-cdn.com/v4/letter/b/8491ac/32.png) [@Barryn56](https://forum.amebaiot.com/u/Barryn56)\
**Post date:** [January 27, 2026, 4:39pm UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/11 "2026-01-27T16:39:12Z")

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Final update - I tested the recording of the video onto SD card, and it is not affected by the slight jitter transmitted to the phone via wifi, so it’s not a significant problem for my application.

Regards,

Barry

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<div class="post-metadata">

**Author:** ![Barryn56](https://avatars.discourse-cdn.com/v4/letter/b/8491ac/32.png) [@Barryn56](https://forum.amebaiot.com/u/Barryn56)\
**Post date:** [February 1, 2026, 2:39am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/12 "2026-02-01T02:39:48Z")

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Hi Pammy - I spoke too soon! So another ‘bug’ I just noticed - my app shows a real time video and has a separate page for setting parameters. I just noticed that after showing the video and then going to set some parameters, when I come back to the video, it is blank. The new websocket fails. So I went back to an original board (March 2025) and the problem is not there. I am looking at moving up the boards to find when the problem occurs. Regards, Barry

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**Author:** ![Pammy](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/pammy/32/936_2.png) [@Pammy](https://forum.amebaiot.com/u/Pammy)\
**Post date:** [February 2, 2026, 1:59am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/13 "2026-02-02T01:59:21Z")

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Hi @Barryn56

May I know which version you are using that causing the video to be blanked? Have you tried on the latest prebuild version 4.1.0-build20260123?

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<div class="post-metadata">

**Author:** ![Barryn56](https://avatars.discourse-cdn.com/v4/letter/b/8491ac/32.png) [@Barryn56](https://forum.amebaiot.com/u/Barryn56)\
**Post date:** [February 2, 2026, 3:37am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/14 "2026-02-02T03:37:50Z")

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Hi Pammy, yes, I was using the latest version, which you kindly fixed the intial problem with that patch you sent. It was only later that I noticed the current issue and thought I had a problem with my code not releasing the initial webserver. However, I couldn’t find the problem so went back to the older version and found the problem disappeared. I have not has time to check other versions at this time. Regards, Barry.

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<div class="post-metadata">

**Author:** ![Pammy](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/pammy/32/936_2.png) [@Pammy](https://forum.amebaiot.com/u/Pammy)\
**Post date:** [February 3, 2026, 1:54am UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/15 "2026-02-03T01:54:02Z")

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Hi @Barryn56 ,

Thank you for the update.

Just to let you know, we do have a Websocket viewer example included in the SDK recently, which you can explore and might be useful to you.

> **[Websocket Viewer — Ameba Arduino AIoT Documentation v1.1 documentation](https://ameba-doc-arduino-sdk.readthedocs-hosted.com/en/latest/ameba_pro2/amb82-mini/Example_Guides/Multimedia/Websocket%20Viewer.html)**

If you do get a chance to check other SDK versions later on and notice anything consistent, please feel free to let me know and I’ll be happy to look into it further.

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<div class="post-metadata">

**Author:** ![Barryn56](https://avatars.discourse-cdn.com/v4/letter/b/8491ac/32.png) [@Barryn56](https://forum.amebaiot.com/u/Barryn56)\
**Post date:** [March 26, 2026, 1:15pm UTC](https://forum.amebaiot.com/t/updated-of-amb82-mini-board-breaks-working-code/4670/16 "2026-03-26T13:15:26Z")

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Hi - update - I completely re-wrote my code and it is working fine with the latest updated board.

Thanks for a great product.

Barry