• 1 Post
  • 119 Comments
Joined 3 years ago
Cake day: September 8th, 2023
  • raldone01@lemmy.worldtoTechnology@lemmy.world•New York considers bill that would ban chatbots from giving legal, medical adviceEnglish
    12·
    8 months ago

    Some of the SOTA models like gemini 3 pro are getting quite good at ballpark/estimations. I have fed it multiple complex formulas from my studies and some values. The end result is often quite close and similar in accuracy how I would do an estimation myself. (It is usually more accurate then my own ones.)

    Now I don’t argue there is any consciousness or magic going on. But I think the generalization that is going on is quite something! I have trained ai models for various robot control and computer vision tasks. Compared to older machine learning approaches transformers are very impressive, computationally accessible and easy to use. (In my limited experience)

  • raldone01@lemmy.worldtoTechnology@lemmy.world•No JS, No CSS, No HTML: online "clubs" celebrate plainer websitesEnglish
    1·
    1 year ago

    I don’t think the promise chain is really needed here.

    I used this script:

    import Axios from 'axios'
import OldFS from 'fs'
import { PromiseChain } from '@feather-ink/ts-utils'

const fs = OldFS.promises

const image = process.argv[2]
const destination = `http://${process.argv[3]}/vfs/ota`
const now = process.argv[4] === 'now'
const once = process.argv[4] === 'once'

async function triggerUpdate(): Promise {
  console.log('Uploading new binary')
  const file = await fs.readFile(image)

  await Axios({
    method: 'POST',
    url: destination,
    headers: {
      'Content-Type': 'application/octet-stream',
      'Content-Length': file.byteLength
    },
    data: file
  })
  console.log('Finished uploading')
}

(async () => {
  const updateChain = new PromiseChain()
  console.log(`Watching file '${image}' for changes\nWill upload to '${destination}'!`)
  if (once) {
    await triggerUpdate()
    return
  }
  if (now)
    await updateChain.enqueue(triggerUpdate)
  OldFS.watch(image, async (eventType) => {
    if (eventType !== 'change')
      return
    let succ = false
    do {
      try {
        console.log('Change detected')
        await updateChain.enqueue(triggerUpdate)
        succ = true
      } catch (e) {
        console.error(e)
        console.log('Retrying upload')
      }
    } while (!succ)
    console.log('Upload finished')
  })
})()

    Relevent code on the esp:

    You can ignore my cpp stuff and just put this in the handler of the stock webserver.

    auto ota = vfs->addHandler(makeDirectory("ota"));
        {
          ota->addHandler(makeDirect([](auto &con) {
            if (con.req->method != HTTP_POST)
              return HandlerReturn::UNHANDLED;

            // https://github.com/espressif/esp-idf/tree/master/examples/system/ota/native_ota_example/main
            // https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/ota.html
            auto updatePartition = esp_ota_get_next_update_partition(nullptr);
            if (updatePartition == nullptr)
              return sendError(con,500, "No free ota partition found!");
            esp_ota_handle_t otaHandle;
            auto err = esp_ota_begin(updatePartition, con.req->content_len, &otaHandle);
            if (err != ESP_OK)
              return sendError(con, 500, std::string{"Can't start ota update: "} + esp_err_to_name(err), true);

            int receivedBytes = 0;
            do {
              auto end = httpd_req_recv(con.req, buf.data(), buf.size());
              // ESP_LOGE(TAG, "Received %d", receivedBytes);
              // hexDump("RECV:", buf.data(), end);
              if (end <= 0) {
                esp_ota_abort(otaHandle);
                return sendError(con, 500, "Error receiving", true);
              }
              err = esp_ota_write(otaHandle, buf.data(), end);
              if (err != ESP_OK) {
                esp_ota_abort(otaHandle);
                return sendError(con, 500, std::string{"Error writing: "} + esp_err_to_name(err), true);
              }
              receivedBytes += end;
            } while (receivedBytes < con.req->content_len);

            err = esp_ota_end(otaHandle);
            if (err != ESP_OK)
              return sendError(con, 500, std::string{"Failed to end: "} + esp_err_to_name(err), true);

            err = esp_ota_set_boot_partition(updatePartition);
            if (err != ESP_OK)
              return sendError(con, 500, std::string{"esp_ota_set_boot_partition failed: "} + esp_err_to_name(err), true);
            auto ret = sendOK(con);
            FactoryResetServiceCon().reboot(1000 / portTICK_PERIOD_MS);
            return ret;
          }));
        }

    I also used a custom partition table for 2 partitions so that when my program crashes it can just go back to boot the previous version.

    Here it is for reference:

    partitions.csv

    # Name,   Type, SubType, Offset,  Size, Flags
# Note: if you change the phy_init or app partition offset, make sure to change the offset in Kconfig.projbuild
nvs,      data, nvs,     0x011000, 0x006000,
otadata,  data, ota,     0x017000, 0x002000,
phy_init, data, phy,     0x019000, 0x001000,
ota_0,    app,  ota_0,   0x020000, 0x1F0000,
ota_1,    app,  ota_1,   0x210000, 0x1F0000,

    Note: This partition table is for a special model of the ESP32 though.

    Also another disclaimer: This code does not represent my current coding abilities and may be outdated - it worked well though.

  • raldone01@lemmy.worldtoTechnology@lemmy.world•No JS, No CSS, No HTML: online "clubs" celebrate plainer websitesEnglish
    3·
    1 year ago

    Back in school my friends all flashed their mcus with 4-8MB images over serial with 115200 baud. I set up ota updates over wifi. They were all fascinated by my speedy flashes. However when I offered to help them set it up, not one was interested because their setup was working as is and slow flashing is not a “bad” thing since it gave them an excuse to do other things.

    We are talking minutes vs seconds here.

    The teachers were surprised by my quick progress and iterations. When I told them my “trick” the gave me bonus points but also were not interested in learning how to do ota which was very easy. A simple 20 minute first time setup would have saved sooo much time during the year.