Memfault logging with timestamps

RE: Memfault logging with timestamps

Dhivin John — Fri, 24 Oct 2025 05:30:08 GMT

Thank you... I’ve done something similar as well.

rene_pvh — Mon, 20 Oct 2025 07:22:55 GMT

Hi Dhivin,

Yes, but to accomplish this, I have build my own quick and dirty log layer over the default log:

static void get_uptime_string(char* buf, size_t size)

{

uint64_t uptime = k_uptime_get();

snprintf((char *)buf, size, "[%lld.%03lld]", (uptime / 1000), (uptime % 1000));

}

void LOG_ERR_STAMPED(const char *fmt, ...){

char buf[256];

char now[20];

get_uptime_string(now, sizeof(now));

va_list args;

va_start(args, fmt);

vsnprintf(buf, sizeof(buf), fmt, args);

va_end(args);

LOG_ERR("%s %s", now, buf);

}

For us this works, we only use this where the timestamp is critical for example errors and change state machine states.

best regards,

René

Dhivin John — Fri, 17 Oct 2025 13:16:53 GMT

Hi,

Did you ever manage to get timestamps to appear for logs in the Memfault Cloud?. If so could you please share how its configured?

Thanks,

rene_pvh — Tue, 13 May 2025 11:38:43 GMT

Hello,

Thank you for the response.

Best regards.

Hakon — Tue, 13 May 2025 11:09:31 GMT

Hello,

timestamp logging in memfault is currently not possible, but there is a feature request for it so I assume it is being worked on.