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by jramboz
Thu Oct 16, 2025 1:18 pm
Forum: ESP-IDF
Topic: Extra insertions when using strncat and snprintf
Replies: 2
Views: 786

Re: Extra insertions when using strncat and snprintf

After digging in some more, it seems you're correct. I had assumed that the ESP_LOGx macros were pushing an entire line to vprintf (or the specified override). But it looks like it actually does a separate vprintf call for each piece of the line (timestamp, message, etc.).

Overall, not a huge ...
by jramboz
Wed Oct 15, 2025 3:17 pm
Forum: ESP-IDF
Topic: Extra insertions when using strncat and snprintf
Replies: 2
Views: 786

Extra insertions when using strncat and snprintf

Hi all,

I'm trying to write a custom logger that takes messages from a queue and transmits them over a BLE connection. Overall, I've got it working, but I have some strange behavior that I can't explain.

I want to prepend a short string ("# ") before transmitting the message. Here is a slightly ...

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