send NRF_LOG to external eeprom

[Etienne]

Hello everyone, 

I work with a custom board with the nRF52840 chip on it. We have  pressure, humidity and temperature sensor and accelerometer sensor on the board. We need to read the sensor's values and logged it on an eeprom.

Our application is a BLE app with SoftDevice s140 and SDK 15.2.0.

My question is: It is possible to redirect NRF_LOG to the eeprom? 

In the low level is there a weak function that could be implement to take another method of log transmission? 

Thank you for your response. 

Etienne

[Vidar Berg]

Hello,

Yes, I don't think it should be a problem to make a new custom backend that stores log messages to EEPROM memory. You may start by taking a look at the  "Logger backend interface" section of the Logger module documentation as well as going through the existing backend implementations. I believe that should give a sufficient overview interfacing part. But note that the log messages are not stored in cleartext, so it might make things a bit more difficult as I noted in this other forum thread: https://devzone.nordicsemi.com/f/nordic-q-a/56200/nrf_log-to-external-flash. Maybe it would become more straightforward without the Logger module. 

[Etienne]

Thanks, I achieved to make a new custom backend to store log messages to the EEPROM.

Etienne