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Topic: LoRa611AES (Read 473 times) previous topic - next topic

Antrac1t

Hi Fols,
i would like to ask you if is possible to connect this LORA module LoRa611AES with arduino. I am trying to find some LORA modules which can communicate with each other more then 3km out of line of sight,more precisely, over the hill with (elevation difference is around 20m but steep climb) and unfortunately i am not able to put another module near to cliff for some communication tunel. I preapared box full of sensor for my greenhouse which is far away 3km from my house

thank you

Antra

Riva

A quick look at the datasheet says yes it will work but be aware that although the device can accept 5V power supply the RX/TX pins look to be 3.3V so you may need to level convert if your using a 5V arduino.
Don't PM me for help as I will ignore it.

Antrac1t

thank you, thats good point

kayel

 My LoRa modules (AI Ra-0.1_V1.0) won't communicate through hills.

jogl8

Antra and Kayel:

Can you tell me a little more about your topology? 

I am considering a Lora connection, not quite line of site, about 1.5 km with a gently rising and falling ridge in between.

Thanks.

srnet

Antra and Kayel:

Can you tell me a little more about your topology? 

I am considering a Lora connection, not quite line of site, about 1.5 km with a gently rising and falling ridge in between.

Thanks.
Whether it will work depends on a lot of factors;

The data rate you need.
The antennas and cables in use at either end.
The height of the antennas at either end.
What type of obstructions and how many there are between the two ends.
The frequency you are going to use.

In general communications at UHF are at their best when there is line of sight between both ends. The difference between an obstructed view, say in an urban area and when there is good line of sight, can be vast, as much as 1500:1. The consequence of this is whilst a system might be capable of 1000km+ when there is good line of sight (and LoRa is capable of this) the range might drop to 1km or less in an urban area.

There are so many variables with a link that the only way of finding out if a link will work is to try it. 
$50SAT is now Silent (but probably still running)
http://www.50dollarsat.info/
http://www.loratracker.uk/

kayel

@jog18

 With my son watching my laptop connected to the receiver and listening on the phone, I took the transmitter for a ride on the luggage-rack of my push-bike.

 The receiver didn't miss a beat going through three of my neighbours' houses at 250 metres from my laptop, on the crest of a gently rising and falling ridge (like yours).

 As soon as I started going down the other side of the ridge, NOTHING AT ALL.

 Maybe it's possible with special aerials or amplifiers, I don't know.

 I saw srnet's reply just before I posted, but posted anyway because you asked me a question.

 You can buy LoRa modules for less than 2€ so I'd take his advice and give it a go.

 Good luck!

srnet

As soon as I started going down the other side of the ridge, NOTHING AT ALL.

 Maybe it's possible with special aerials or amplifiers, I don't know.

 I saw srnet's reply just before I posted, but posted anyway because you asked me a question.

Or maybe, at no extra cost at all, you just need to use the appropriate LoRa settings and get 10-16 times the range.
$50SAT is now Silent (but probably still running)
http://www.50dollarsat.info/
http://www.loratracker.uk/

kayel

Or maybe, at no extra cost at all, you just need to use the appropriate LoRa settings and get 10-16 times the range.
True.

 I was using the Picaxe Basic version of this code:

 http://www.picaxeforum.co.uk/entry.php?2245-OPL-Transmitter-ino

 http://www.picaxeforum.co.uk/entry.php?2237-OPL-Receiver-ino
 
 As far as possible, I used the power-on/reset values to keep it short and simple.


 
 
 
 



 

 


srnet

As far as possible, I used the power-on/reset values to keep it short and simple.

May not be a good idea in this case, the defaults may be illegal to use in your part of the world and\or could cause interference to essential services.
$50SAT is now Silent (but probably still running)
http://www.50dollarsat.info/
http://www.loratracker.uk/

kayel

May not be a good idea in this case, the defaults may be illegal to use in your part of the world and\or could cause interference to essential services.
I read some of the legal guff and thought I was OK.

 I've e-mailed the government authority concerning my particular modules, to make sure, one way or the other.

srnet

#11
Apr 17, 2018, 11:31 pm Last Edit: Apr 17, 2018, 11:33 pm by srnet
I read some of the legal guff and thought I was OK.
You need to know the set frequency, the bandwidth, the power level and the duty cycle.

So what are these default settings that you were using ?

Do not assume its a case of the 'modules' being approved or 'allowed', its how you configure and use them that counts.

$50SAT is now Silent (but probably still running)
http://www.50dollarsat.info/
http://www.loratracker.uk/

kayel

So what are these default settings that you were using ?
The settings I changed are in the code I linked to. The default settings are the ones in the "reset" column on pages 108 to 114 of the Semtech SX1276/77/78/79 datasheet.

 

 


Riva

If you find you cannot get through the hill with your Lora  signal then if you can reach a gateway with it and the other end is connected to the internet (or something is) then try a service like this to gather your data.
Don't PM me for help as I will ignore it.

mauried

The trade off you have to make for a power limited system and an obstructed path is how slow can you go with your data rate.
Lora is a DSS system which trades receiver sensitivity for data rate so the slower you go the better range you get.
The practicality of this depends on how much data you need to send and how fast.

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