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Member's Forum I need help on designing a handheld storage based on micro SD Card + QSPI interface + Wi-Fi data transfer
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  • Replies 24 replies
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  • qspi
  • SD card
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I need help on designing a handheld storage based on micro SD Card + QSPI interface + Wi-Fi data transfer

HKPhysicist
HKPhysicist 14 days ago

Hello Fellow Engineers and Experts,

I want to design a device to replace the super expensive iCloud or Gcloud digital monopoly.  So you can download your beloved digital contents from your phone any time through Wi-Fi.  Then, stack them up one by one infinitely under your desk.

It is my basic components:

  1. micro SD Card
  2. SQPI interface and controller
  3. a MCU with SQPI peripheral, with SoC Wi-Fi
  4. a built-in Li+ battery
  5. Li+ charger chip
  6. any more
  7. There are already many USB storages for this purpose.  So this method will not be my goal.

Please share your opinions.  Perhaps, we can work together.  Wink

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  • abtAmit
    0 abtAmit 13 days ago

    Transferring files through bluetooth is super slow. You can use it for files less than 2MB. 

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  • HKPhysicist
    0 HKPhysicist 12 days ago in reply to abtAmit

    Yes, I tested it together on my PC and phone.  128MB took many minutes to transfer.

    I need wifi for that purpose.

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  • abtAmit
    0 abtAmit 6 days ago in reply to HKPhysicist

    You can use esp32S3 it support SD_MMC. SD Cards does not support QSPI but they do support SD_MMC interface.
    ESP have well documented here esp-idf/examples/storage/sd_card/sdmmc at master · espressif/esp-idf

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  • abtAmit
    0 abtAmit 6 days ago in reply to HKPhysicist

    You can use esp32S3 it support SD_MMC. SD Cards does not support QSPI but they do support SD_MMC interface.
    ESP have well documented here esp-idf/examples/storage/sd_card/sdmmc at master · espressif/esp-idf

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