LoRa V3 TX_OUTPUT_POWER

#1

Hi Heltec community, is there a way to set the maximum transmission power for LoRaWan? There is an example in the examples folder for “plain lora”.

Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
                             LORA_SPREADING_FACTOR, LORA_CODINGRATE,
                             LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
                             true, 0, 0, LORA_IQ_INVERSION_ON, 3000 );

However, I have not found anything for LoRaWan? In the case of LoRaWan, do the nodes automatically transmit at full power?

Thank you

#2

The node is automatic full power transmission, with a default of 17dB

#3

Isn’t “Full Power” in the specs for this unit 21dbm +/-1dbm?

#4

The SX1262 can reach up to +22dBm but the LoRaWAN specs allow a maximum of +16dBm in EU region

#5

That may be, however the original question was regarding how to set the output power. The follow up answer was “The node is automatic full power transmission, with a default of 17dB” however, if the device is capable of meeting its specified max Tx power of 22dbm, then there must be a way of setting it…

I do not have a V3 board at hand, but my V2 code compiles just fine for this board.

To set Tx power using the LoRaWan_App library, I use:

#define TX_OUTPUT_POWER 14