BLE advertising beacon eddystone data over air then go to sleep in system ON mode periodically need example of this?

Question

i am using nrf connect extension in vs code with Zephyr os version v3.2.99-ncs2 . i use BLE beacon sample on NRF52833 development Kit. i want to build Application in which device send specific string of data over ble without making Connection to scanner then goes to sleep and repeat. during sleep device should consume 1.6uA or less than 1.6 uA current. i have read the datasheet it specifies system on sleep no ram retention: 1.6uA. page number 53, table: 5.2.1 Electrical specification 5.2.1.1 Sleep. 
 i already checked the system off sample but it can only wake up the nrf52833 by external interrupt. which is not suitable for my application. by system off example . i read 0.3 uA current. 
 1. system ON example: how put nrf52833 in sleep with/without no ram retention wake up on rtc. or other System ON examples. 
 2. as per my requirement: advertise data-sleep-repeat with minimum current consumption in micro amperes. 
 link: system off: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/boards/nrf/system_off/README.html 
 datasheet: infocenter.nordicsemi.com/.../nRF52833_OPS_v0.7.pdf

Einar Thorsrud · Accepted Answer

Hi, 
 starkAbhi said: 1. my requirement of project to use 3v/3.3v button cell with nrf52833 soc. to advertise for 1 second and goes to sleep for 3 second periodically. minimum total average current should be in range 3uA - 20uA. 
 Do you mean to send several advertising pckets during this one second, and then no for the next 3 seconds, and then some for 1 second again, etc? If so, you can still use the online power profiler to estimate the current consumption but you need to do some simple calculations your self in addition to take into account that you are only actively advertising for 25% of the time, and for the rest of the you have the idle current consumption. 
 starkAbhi said: 2. timer interrupt alarm, i have been use this timer. to toggle led. does below code will wakeup the nrf52833 dk from event based sleep? or please suggest code sample and advice regarding sleep? 
 The counter_set_channel_alarm API can use both an RTC and TIMER as backend, and if it use an RTC it will be low-power. If use a TIMER, it will not (I do not know what your counter_dev_o is though). I would suggest using other Zephyr time API instead. For LED blinking for instance, I would just use k_msleep() as you can see in the blinky example. This will pause the thread for the specified amount of time, and the kernel handles the timing using an RTC. 
 starkAbhi said: 3. in online power profiler, it shows total average current. how many samples of measurement does it take to conclude its total average current. 
 This doe snot sample anything, but it is based on models that we have feed a lot of measurement data into. You can see in the plot which current consumption levels calculate for which duration of time with the given configuration.

BLE advertising beacon eddystone data over air then go to sleep in system ON mode periodically need example of this?

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