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jgromes / RadioLib

Universal wireless communication library for embedded devices
https://jgromes.github.io/RadioLib/
MIT License
1.59k stars 395 forks source link

Setting bw to 500.0 and sf to 11 #502

Closed jgromes closed 2 years ago

jgromes commented 2 years ago

Discussed in https://github.com/jgromes/RadioLib/discussions/495

Originally posted by **frogg1ven** March 21, 2022 Hi, I'm working with lora E220, and trying to transmitt data, but after radio.begin() I'm getting state error code -20. My begin function has params like this: `radio.begin(869.5, 500.0, 11, 8, SX126X_SYNC_WORD_PRIVATE, 1, 8, 0);` With bw=125.0 and sf=9, everything works perfectly, and I read that with bandwidth equals to 500.0 kHz, I should be able to set spreading factor to 11. ![Zrzut ekranu 2022-03-21 143006](https://user-images.githubusercontent.com/49206712/159271200-f9d64e15-3ecd-4119-bee5-1b25c13ccae4.jpg) I was also trying to use `radio.setSpreadingFactor(11);` after `radio.begin(869.5, 500.0, 9, 8, SX126X_SYNC_WORD_PRIVATE, 1, 8, 0);`, and there is no state error, but it doesn't seems to change sf to 11. Am I doing something wrong? Regards.
jgromes commented 2 years ago

@frogg1ven there was an issue with default BW being set to 125 kHz for all SX126x derivatives, including LLCC68. For that value, SF11 was invalid, hence the error code. Should be fixed now, thanks for reporting!

frogg1ven commented 2 years ago

Thank you @jgromes for fast fix, everything is working fine now. Regards.