Logger Module - power consumption

RE: Logger Module - power consumption

RichieJH — Tue, 01 Aug 2017 13:41:13 GMT

Great, thanks.

RE: Logger Module - power consumption

ovrebekk — Tue, 01 Aug 2017 13:13:05 GMT

Hi
Turning off NRF_LOG_ENABLED in sdk_config.h should be sufficient.

Best regards

RE: Logger Module - power consumption

RichieJH — Tue, 01 Aug 2017 11:35:48 GMT

Thanks. What is the best way to disable it. Comment the init out of main, disable module in sdk_config, anything else?

RE: Logger Module - power consumption

ovrebekk — Tue, 01 Aug 2017 11:08:53 GMT

Hi Richie

Even without the debugger connected the RTT logging will probably burn through some extra clock cycles when pushing log data to RAM, increasing the average current somewhat.

For optimal power consumption I would disable logging before compiling the release hex file.

Best regards
Torbjørn

RE: Logger Module - power consumption

RichieJH — Tue, 01 Aug 2017 06:49:01 GMT

Yes, that is what I am referring to - and I'm referring to RTT not UART.

RE: Logger Module - power consumption

Roger Clark — Tue, 01 Aug 2017 01:16:02 GMT

Do you mean using NRF_LOG_INFO and NRF_LOG_DEBUG ??

If so, it depends on how its configured, if its UART then it definitely takes more power.

If you are using Segger RTT I don't know , but probably won't

Also, are you aware that immediatly after upload via SWD the MCU is in a sort of debugging mode, so you need to to a hard reset before measuring current consumption.