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[NUCLEO-WL55JC] FSK Modulation - WakeUp from Sleep mode

Ayoub Cheggari
Associate III


I really like the NUCLEO-WL55JC platform as it provides many features for FSK which I am using, but when I checked the UM, I didn't find a way to wake Up the MCU by receiving a Frame. From my experience, there should be a mode different than RX, in which the Transceiver is in sleep and wakes Up and them force the wake Up of the MCU to handle the incoming frame. 

Is there a way to fulfil this requirement?



ST Employee

Hello @Ayoub Cheggari and welcome to the ST Community.

I suggest you to take a look on the  sub-GHz radio IRQ, that should be a solution for your case ( check the reference manual).



To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

Hi Issam,

I wouldn't ask a question if I didn't search very well! I've read the whole basic documentation but maybe I missed the answer. 

I actually resolved half of the issue! I can wake Up the mcu with RF IRQ line but I don't receive any Preamble or Valid Sync Interrupts.