ESP32 Forum

Hi all -

I need to start storing log messages. It would be nice if I could store ~1000 messages of up to ~100 characters each. I've already done all the work involved in routing ESP_LOG* though my own function, so now I just need a means of storing them. I was thinking of using a namespace in NVS, and store them as key value pairs. The keys would be like LOG_NNN, and I'd maintain a variable that denoted the last used value. Once I reached the limit (of 999) I'd start over, to emulate a crude ring buffer.

Before I dive into this, I just wanted to get a sense from people as to whether this idea was good/so-so/terrible. I don't think I will need to be terribly efficient (most of the time, there will just be one message every few minutes of operation, though there will be occasional bursts when a handful of messages might all come at (nearly) the same time.

Opinions? Thanks...

Good idea; logging is necessary for support-ability.

Depending upon what you see in the bursts of log entries it might help keep a more complete history if duplicates of the last entry were simply added to a counter of the last entry. It might prevent the wrap around of the log for bursts of duplicates. Depends what you see.

Tom Meyers

have a solution?

I did implement a logging facility, but it was more elaborate than I first thought it would be (source file was almost 1200 lines).

If a cloud-attached solution is an option there is now also ESP Insights. It lets you collect logs, metrics and core dumps from devices and analyze them in the cloud.

Mzimmers you work on cool stuff. I have been following your posts for years, tom