Safe Testing of LoRa

[T J]

Posted on December 26, 2017 at 03:42

for a short term experiment, I need to transceive through 500M of bush, I ordered the 100mW and 1W units below.

Is there a best practice guide for LoRa Power ?  

I have my new

https://www.aliexpress.com/item/Original-CDSENET-2pcs-E44-TTL-100-20dBm-long-range-3km-SX1276-915MHz-LoRa-RF-Transceiver-Module/32791688496.html?spm=2114.search0104.3.8.ZK0T8y&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10065_5000015_10151_10344_10068_10130_10342_10547_10343_51102_10340_10341_10...

 

What is the best way to shield the engineer from the radio transmitter, while he is working on the protocol ?

Which is the best concentrator to start with ?

[Tesla DeLorean]

Posted on December 26, 2017 at 18:38

These modules have an STM8 inside, not sure they are designed to work with LoRaWAN, but rather point-to-(multi)point

Place the antenna above and away from you. Cable the devices so you don't need to touch them, and drop power to lowest levels.

The Murata 100mW module can get ~1KM with minimal effort. Get about 3KM LoS at higher data rates (31kbps), seen 11KM LoS at the lowest (183bps). It could probably get further, but my local topology isn't helpful, and I'm not inclined to climb 100ft-600ft towers. Seen people report 27KM range where base was up a mountain. I could readily see someone using this for long distance control/telemetry link for a UAV.

For range testing here I have a base unit periodically beacon a signal, and a rover unit in the truck that beeps when the valid data is received. The counter play is to have the rover beacon a GPS location, and have the base log these and compute distance or plot coverage map.