(solved) how to encode binary (blob) in .csv file?

[mzimmers]

Hi all -

I'm porting an app to the ESP32. It currently stores all of its configuration settings in a struct, which it reads and writes in its entirety. I can read and write the blob from the app, using NVS calls. What I need to do is figure out how to initialize it. My original idea is to write a second program (that would run on the desktop) to produce a binary file, that I could specify in my .csv file, and use the partition generator to create the .bin, and flash that using esptool write_flash.

This seems like it would work, but it seems rather circuitous. Am I overlooking an easier way to do this?

Thanks...

[nopnop2002]

Erase specified NVS partition and open specified NVS partition.

nvs_flash_erase_partition()

nvs_flash_init_partition()

nvs_open_from_partition()

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Erase key-value pair with given key name.

nvs_erase_key()

-------------------------------------------

Erase all key-value pairs in a namespace.

nvs_erase_all()

[mzimmers]

I'm trying to encode a default value for the blob in my .csv file, not create it programmatically. The customer needs to provision data like run schedules at manufacture.

Anyone have an idea for doing this?

Thanks...

[mzimmers]

Figured it out:

Code: Select all

NVS_KEY_SCH,file,hex2bin,schedule.hex

where schedule.hex is a text file with hex representations (with no formatting):

Code: Select all

44656661756C74205363686564756C6500000...

Evidently, you can only initialize scalars directly in the .csv file; aggregates have to go into files.

[nopnop2002]

There is how to do a "Create Unique Factory Data Image".

You can use nvs_partition_gen.py to create NVS partitions.

Data such as the serial number can be written to the second NVS area.

https://blog.espressif.com/building-pro ... 642832a7a3