LoPy Antenna Setup / Installation

[borjam]

@bmarkus

Anyway the SX1272 datasheet states a maxium VSWR of 3:1 when transmitting at +20 dBm. (rev. 3, page 84) and a maximum duty cycle of 1%. In extreme cases it could lead to damage I imagine.

[GregS]

@borjam Hmm - thanks for the heads up re the 1% duty cycle @20dBm - I guess that's an added incentive for honouring network fair use policies. ;^)

[borjam]

@GregS A pleasure ;)

Moreover, I forgot. Even when not causing damage, overheating might cause signal distortion, which can be a tough issue to debug. I'm speaking in general terms once more, but better safe than pulling your hair out because suddenly you can't decode your transmissions properly.

[assia]

Hi @LoneTech I used lopy in LoRa mode without external antenna and now I have to add the external antenna and I want to know if I have to do a configuration in my code to select the external antenna.
Knowing that I found nothing in the documentation as for WLAN for example.

[livius]

@assia
Lora must use external antenna it does not use smd antenna
it is only available for Wifi

It is strongly recomended to do not use Lora without Lora antenna at all.

And because of that, you do not find any settings for this in documentation
it work only with external antenna

[assia]

@livius thanks for quick response. Unfortunately I did not know that. So i don't need a configuration code to select external antenna and it will be automatic as soon as I set up the external antenna?

[livius]

@assia said in LoPy Antenna Setup / Installation:

it will be automatic as soon as I set up the external antenna

Yes, you do not need to do anything more
and as written previously better is not start Lora without antenna at all