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Xynium
Associate III
February 13, 2022
Question

STM32WL55 SubGHz Preamble

  • February 13, 2022
  • 3 replies
  • 2774 views

Hi,

About the stm32wl55 subGHz module. I choose FSK mode because of his higher flow rate than LORA. Question what is the preamble, i know his length can be tuned but what it is ?

Regards

JP

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3 replies

Tesla DeLorean
Guru
February 13, 2022

A data pattern the receiver can recognize and synchronize too. Also allows the early recognition of two transmitters stepping on each other​ for abort/retry over channel ownership. Generally transmitters look for the channel to be free/clear before starting as the medium is shared.

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Xynium
XyniumAuthor
Associate III
February 13, 2022

yes, but what is that data pattern ?

Xynium
XyniumAuthor
Associate III
February 23, 2022

sequence of 1.0 for FSK

0 for LORA