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sx1276 radio increase the TX power up to +20dbm

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Hii
how can we increase TX power up to +20dbm for EU433?

radio: sx1276
ISM band: EU433
MBED_RADIO_SHIELD: SX1276MB1MAS

Thank you
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This question was first asked on LoRaMac-node project.
It was recommended there to post the same question on this forum.

https://github.com/Lora-net/LoRaMac-node/issues/735
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Yes, so i have posted same question on this forum

can you please help me?
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As said on the GitHub answer the LoRaWAN specification doesn't allow the use of a power at 20 dBm for EU433 region.

Your issue is related to the range that you get (around 100 m). I think that this is more related to the hardware.

Semtech RF experts may provide more valuable clues on how to improve the range. That' s why I have asked you to post the question here.

You can set the radio to transmit at 20 dBm quite easily by calling the function SetRfTxPower( 20 );
The problem is that you will not be compliant anymore and in plus if you have issues with your hardware design it will not solve your range issue.