Increase max transmit power for sx127x boards to 20dbm.

markqvist / RNode_Firmware

RNode is an open, free and flexible digital radio interface with many uses

https://unsigned.io/rnode

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Increase max transmit power for sx127x boards to 20dbm. #80

Closed FountainOfInk closed 2 weeks ago

FountainOfInk commented 2 weeks ago

Hello! I have recently purchased two LoRa32 V2.1_1.6 (no TCXO, sx1276 variant (868/915/923MHz)) transcievers for use with Reticulum using the RNode firmware. While configuring my devices, I noticed that the specification sheet allows for a maximum of 20dbm transmit power. Additionally, this is within the permissible maximum transmit power according to US law (FCC Part 15.247(b)(3))). This commit simply changes the maximum transmit power to 20, instead of 17. Tell me if there's something I missed!

markqvist commented 2 weeks ago

This has been discussed several times before. The limit is there because the datasheet clearly states that 20dBm output power is only supported in very specific cases, including needing to use a duty cycle less than 1%, or potentially damaging the transceiver. The limit is there for a good reason :)

If you want to experiment with it anyway, you can manually change the source, recompile and flash locally. You have been warned, though ;)

FountainOfInk commented 2 weeks ago

I see, I was not aware. Thank you for telling me.