Operation of TXPower in RUI3

WisBlock
1

Hi, I am running a program to sweep my region settings with different DR and TxP: US915 with a RAK10701 and RUI3 version 4.1.1, when used to set the power using api.lorawan.txp.set(value); according to the documentation it varies depending on the region it is set to

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In the note found in the documentation it is in a range of 0 to 14 where 0 is 22 dBm and 14 is 2 dBm?
But checking RUI3 Appendix - LoRaWAN Regional Parameter (TX Power).
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it specifies that the values of 11 ~ 15 are RFU which confuses me a bit. what is the range that applies in the US915 region, actually the power varies from 22, 20,18,16,14,12,10…2 dBm? But in this other post RUI3 TXPower clarification they indicate that
TXPower-Configuration.
3--------------MaxEIRP - 6dB
4--------------MaxEIRP - 8dB
5--------------MaxEIRP -10dB
6--------------MaxEIRP - 12dB
7--------------MaxEIRP - 14 dB
8--------------MaxEIRP - 16 dB
9--------------MaxEIRP - 18dB
So, with the value of 9 would be 4 dBm and with the value of 10 = 10 dBm? according to the table in the documentation

2

Welcome to RAK forum @Swift ,

I am not sure what confuses you but the mapping of US915 should look like this:

  • TX Power 0: 30 dBm
  • TX Power 1: 28 dBm
  • TX Power 2: 26 dBm
  • TX Power 3: 24 dBm
  • TX Power 4: 22 dBm
  • TX Power 5: 20 dBm
  • TX Power 6: 18 dBm
  • TX Power 7: 16 dBm
  • TX Power 8: 14 dBm
  • TX Power 9: 12 dBm
  • TX Power 10: 10 dBm

The radio max capacity is clipped to 22dBm. So TX power setting of 0 to 4 will all be the same maximum based on the maximum limit of the chip which is 22dBm. This is also what I mentioned on the link you posted.