RE: Efficiency of the Async UART API

blitz0145 — Mon, 24 Feb 2025 15:32:34 GMT

Makes sense; we'll try to free up two pins to get flow control going. If not we'll periodically send data- get some sort of a timing based control going.

Thanks for the help Kenneth! Closing this thread.

RE: Efficiency of the Async UART API

Kenneth — Mon, 24 Feb 2025 12:42:51 GMT

Hello,

While UART is in receive mode it will use relatively high power consumption, it's only when you stop receive mode that the current significantly drop.

To be able to power optimize any application with UART, you need some external hand shaking signals (e.g. flow control) to turn the UART to receive mode only when there is data. I do not see any good way to avoid this, but I guess you can periodically (e.g. every 100ms) send some UART data to inform that you will now turn on the UART RX for a short period (e.g. 5ms) of time.

Kenneth