STM32WL55JC RF Power Measurement

SatelliteCat · ‎2025-09-05

I'm currently testing a board that I designed incorporating an STM32WLJC55. The RF section is based on the 433 MHz MB1389E reference, with component changes due to availability issues and some PCB layout revisions. The design does successfully transmit and receive 433 MHz LoRa, however I want to compare and verify RF performance against the MB1389E/Nucleo-WL55JC2 developers' board. Is there a way to generate a continuous RF carrier at a set frequency so I can do RF power meter/spectrum analyser tests?

STTwo-32 · ‎2025-09-26

Hello @SatelliteCat

You should be able to do that using the void TxCw ( int8_t power ) that Sets the transmitter in continuous unmodulated carrier mode. You can use the AT command "AT$CW= frequency" to do that using the Sigfox_AT_Slave example. AN5480 should be helpful for you.

Best Regards.

STTwo-32

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