hobbya,
I thought that RTC was more accurate and easier to use than delay() and started using it without thinking much about the current during sleep mode. Later experiments showed that RTCs have a monthly difference of more than 1 minute, and furthermore, using FreeRTOS delay() reduces the current, making the use of RTC meaningless.
In my application Central is always connected to the power supply as it writes data to the SD and displays information. I did not think much about the current in Central. Reducing Central current may be an interesting topic. I am now working on the following topic and will think about it in this topic.
‘XIAO_BLE wakes up from System_ON_Sleep and Writes weather data to on-board Flash’
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