How to select the transmitting power mode based on region(EU868) for stm32WL?

[pragnesh]

Hello community,

I am designing the STM32WL module for the EU868 (south Africa) region based on the LoRAWAN application.

 As per the datasheet of stm32WL, the max power used in transmitting is 14 dBm @ 868MHz, so with the reference from the Lora-alliance (PAGE 27) document given below, we are selecting Low power mode for RF.

Because for high power the maximum power for the transmitter is +22dBm and the minimum is +14dBm, which is not convenient as per the Lora alliance.

Please suggest a suggestion for this or correct me if I am wrong.

https://www.st.com/resource/en/datasheet/stm32wle5cc.pdf

 https://resources.lora-alliance.org/technical-specifications/rp2-1-0-3-lorawan-regional-parameters 

[Louis AUDOLY]

Hello @pragnesh​ ,

If you only select the region EU868, the max TX Power and the Max EIRP will be define. They are in line with the lora alliance specification for this region.

I suggest you to look for the file "RegionEU868.c" you will find here "Middlewares\Third_Party\LoRaWAN\Mac\Region" that describe the EU868_MAX_TX_POWER, EU868_DEFAULT_MAX_EIRP.

You can also refer to this post, and more specifically to my answer (the table 10 and the text below)

I hope this will help and answer your question.

Regards

Louis