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roman239955
roman239955
Associate II
February 19, 2020
Question

STM32WL Antenna Diversity Support?

  • February 19, 2020
  • 1 reply
  • 1013 views

Hello,

Is there GPIO support for antenna diversity on the STM32WL? The SX126x has dedicated gpio that can be configured to toggle automatically when in RX/TX mode. This is very important when in low duty cycle modes of operation because then the MCU does not need to wake when the radio is listening autonomously.

Best Regards,

Roman

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1 reply

Andrew Larkin
Andrew Larkin
Associate III
February 22, 2020

Been trying to crack this nut myself as well.

As far as I can see, the DIO2 Tx/Rx change over functionality of the SX1262 hasn't been exposed in the STM32WLE: you have to use a GPIO for the task.

The legacy circuit diagrams on the migration guide (Figures 1 to 3) all show GPIO being used for the Tx/Rx switch and DIO2 being used as a status to the MCU.

The relevant OpCode 0x9D from the SX1262 isn't listed in the STM32WLE ref man.

I think we're stuck on GPIO.

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