Low power I2C BLE beacon,

[msfujino]

This is not a direct answer, but the sketch in post #31 in the link below may be helpful.

System_ON_Sleep of XIAO BLE

I have considered a method to advertise a small amount of data (up to 24 bytes) added to the MSD(Manufacturer Specific Data) without connecting to Central. Peripheral advertises with data on them unilaterally, and Central retrieves it from the scan data without connection. The experimental conditions were BSP : Seeed nRF52 Boards 1.1.1 Board : Seeed nRF52 Boards / Seeed XIAO nRF52840 Sense System ON Sleep : Using RTOS delay() Task : Send 8 bytes of data every 10 seconds Current reduction m…