xDot Antenna Gain

[William Laing]

Good Day.

For one application, we are using xDot’s with this antenna (Taoglas). The antenna has a gain of 3.14 dBi.

We are having trouble connecting to a third-party LoRa network.

The transmission power is set to 20 using AT+TXP=20. The TX data rate is set to DR2 using AT+TXDR=DR2. The antenna gain is set to 0 using AT+ANT=0 as instructed by the LoRa network provider.

1. What does AT+ANT do? Does it increase the output power from the xDot to the antenna?
2. If we change the antenna gain to 3 (AT+ANT=3), will that improve the performance of the radio?

We are LoRa newbies and thank you in advance for your consideration.

• This topic was modified 5 years, 5 months ago by William Laing.

[Jason Reiss]

The stack uses antenna gain setting to output the correct power from the radio to the antenna to affect the desired EIRP.

Max power depends on region and frequency.
The antenna setting should match the antenna gain to ensure regional limits are not exceeded.

Debug output will show the power and gain settings used for each tx.

[William Laing]

Okay, Jason, thanks.

Which file would contain that debug output?

[Jason Reiss]

xDot debug output over serial.

[William Laing]

Okay, we have the debug port working and changed the debug to six, so we can see everything.

The debug messages are fairly self-explanatory, but are they documented somewhere?

Thank you.

[Jason Reiss]

See troubleshooting guide.

http://www.multitech.net/developer/software/lora/troubleshooting-lora-communication/

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