4. UIFlow2.0 NVS how-to check pre-existence (ESP_ERR_NVS_NOT_FOUND)

UIFlow2.0 NVS how-to check pre-existence (ESP_ERR_NVS_NOT_FOUND)

  • T

    Hi, I want to use NVS in UIFlow2.0 with blocks, but I think this is not possible.
    Normally, you should read a nvs value and, if it does not exist, create it, but there is no block to check the existence of a variable, and reading a variable which does not exist causes the program to crash (ESP_ERR_NVS_NOT_FOUND).
    How I can do that check? Can I catch the error so the program is not stopped?

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  • Hello @txinto

    you can wrap the get key block in a try / except block. See example M5Dial_NVS_UIFlow2.0.1 in the UIFlow2 Project Zone.

    Thanks
    Felix

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