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DirkH
Associate III
May 12, 2026
Solved

Non standard preamble on STM32WL33

  • May 12, 2026
  • 1 reply
  • 133 views

I need to implement a protocol using 11110000 as preamble. The protocol is 2-FSK 868.1 MHz, +/-35kHz, 25kbps. According to RM0511 STM32WL33 only supports 01010101 or 10101010 as preamble for 2-FSK. Is it feasible to use the STM32WL33? I am planning to use direct buffer mode.

Best answer by Filippo_Malleo

Hi DirkH, 

yes, you can use the Direct through buffer mode, so you can implement your protocol bypassing any packet handler constraint.

BR,
Filippo

1 reply

Filippo_MalleoBest answer
ST Technical Moderator
May 12, 2026

Hi DirkH, 

yes, you can use the Direct through buffer mode, so you can implement your protocol bypassing any packet handler constraint.

BR,
Filippo

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