racp nrf52 external memory

[matthk]

Hello, I have in a multi-sensor application some actual data (including RTC) which appear continuously and which have to be saved in an external RAM connected by I²C. All these data for one time take 20 Bytes and build a data set. Up to 1024 data sets shall be saved; an external device like a Tablet or a Smartphone shall read them all or only a part of it. I saw the interesting blog devzone.nordicsemi.com/.../ but unfortunately this is for nrf51 and with encryption - in my project the encryption is planned much later. My questions are:

• Is there any example with code, which shows how to implement this?
• Is it possible to preview already the encryption for the future? Thanks in advance

[matthk]

Hello Petter, the external RAM is a FRAM which keeps information even when the battery is down. The number of rewrite can easily achieve 100000 times, so the flash will not help me. I forgot to write that I want to use the RACP technology; yesterday I have tried to implement the CGM (with code from nrf51 - see the link in the first message) example in my project (nrf52); actually the error 7 appears in the function sd_ble_gap_adv_start() and I have to look why. The recommendation - first calling services_init() and then advertising_init() - is already done; even if I don't know if this is still a subject in SDK13.0. Would you recommend to change to the latest SDK? Do you have some recent code for nrf52 and RACP? Thanks in advance!