mimi xia

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9 years, 8 months ago.

Is it possible to set TX_OUTPUT_POWER to 20dBm when using Sx1276MBLAS in HF LoRa mode?

Hi, I have two Sx1276MBLAS shield attached to FRDM-KL25Z. I am trying to test the range of the device with the PingPong demo at maximum power output. We are in NA, so only 915MHz band is available to us. Is it possible to set the output power to 20dBm? when i try ti increase the TX_OUTPUT_POWER to above 14 dBm, it seem to wrap around to 0? Is the PA_BOOST automatically enabled when using 915MHz, or do I have to set a register?

Thanks, MX

Question relating to:

Last updated: 12 Aug 2015
Driver for the SX1276 RF Transceiver

1 Answer

Gregory Cristian
9 years, 8 months ago.

To get 20 dBm output power on the Sx1276MBLAS in NA, you only need to change two lines:

Change in main.c from:

  1. define RF_FREQUENCY 868000000 Hz
  2. define TX_OUTPUT_POWER 14 14 dBm

to

  1. define RF_FREQUENCY 915000000 Hz
  2. define TX_OUTPUT_POWER 20 20 dBm

The low level driver will set the registers accordingly.

Accepted Answer