[chbot] LoRa peer to peer

Mark Atherton markaren1 at xtra.co.nz
Tue May 13 21:26:04 BST 2025 

I think that line-of-sight is the issue.

2.4GHz can easily be attenuated by walls, windows, & bananas.

433MHz is much more able to penetrate same...


On 14-May-25 7:49 AM, Charles Manning wrote:
> It isn't clear how much data you want to move.
> 
> Bluetooth LE using a coded PHY can get to around 1km line of sight with 
> just a trace antenna and that's a full 2-way solution.
> 
> https://blog.nordicsemi.com/getconnected/tested-by-nordic-bluetooth-long-range <https://blog.nordicsemi.com/getconnected/tested-by-nordic-bluetooth-long-range>
> 
> 
> 
> On Tue, May 13, 2025 at 9:27 PM Robin Gilks <gb7ipd at gmail.com 
> <mailto:gb7ipd at gmail.com>> wrote:
> 
>     I'll try and address a few points
> 
>       * sx1278 maxes out at 500MHz so no LoRaWan as that's 915MHz here in NZ
>       * Bowtie antenna at 433MHz would be a bit big!! I've used them on
>         2.4GHz though when I had the wind turbine on the other side of a
>         paddock with a WIFI Link
>       * 433MHz using $1 OOK radios (used on my weather station) if OK
>         for single 18650 cell power and a 1w 6v solar panel but only
>         reaches about 30m and then only with the receiver in the window
>       * Looking to update an old project that used NRF24L01 link from my
>         tunnel house back to either the workshop or the house. I'll be
>         sending LCD screen data updates one way and button presses the
>         other for full remote control
>       * Remote power is a 12v 120AHr car battery from the wreckers with
>         a 10w solar panel keeping in on float so 120mA TX current on
>         LoRa won't be a problem (I'm hoping to run without the PA turned
>         right up)
> 
>     The modules haven't arrived yet but a modded tunnel house window
>     controller PCB is modified and most of the code is ready to run once
>     I have something to connect up
> 
>     I see that they also do OOK - I wonder if they would make a better
>     receiver than the $1 ones on the weather station or if it's more
>     sophisticated OOK ;)
> 
> 
>     On Tue, May 13, 2025 at 5:22 PM Richard Jones
>     <richardandjanenz at gmail.com <mailto:richardandjanenz at gmail.com>> wrote:
> 
>         In the early days of wifi I had good success with wifi over 4km
>         from Diamond Harbour to Lyttelton using a bow tie antenna
>         similar to this one:
>         https://nz.pinterest.com/pin/759630662129071602/
>         <https://nz.pinterest.com/pin/759630662129071602/>
> 
>         Richard
> 
>         On Tue, May 13, 2025 at 5:08 PM Daniel Powell
>         <danielvieway at hotmail.com <mailto:danielvieway at hotmail.com>> wrote:
> 
>             ESPNow, or WiFi LR, both Expressive protocols. Wifi LR does
>             1km line of sight or more with good antennas. ESPNow does
>             500m line of sight, but again more with a reasonable
>             external antenna. ____
> 
>             __ __
> 
>             Daniel. ____
> 
>             __ __
> 
>             *From:*Chchrobotics <chchrobotics-bounces at lists.ourshack.com
>             <mailto:chchrobotics-bounces at lists.ourshack.com>> *On Behalf
>             Of *Mark Beckett
>             *Sent:* Tuesday, 13 May 2025 4:53 pm
>             *To:* chchrobotics at lists.ourshack.com
>             <mailto:chchrobotics at lists.ourshack.com>
>             *Subject:* Re: [chbot] LoRa peer to peer____
> 
>             __ __
> 
>             I've played with NRF24L01 and easily done 400m.____
> 
>             On eissue is with the high power versions you need a bit of
>             physical seperation otherwise it seems to overwhelm the
>             front end.____
> 
>             __ __
> 
>             There is a lot of discussion on LoRa and hardware on the
>             discord
>             https://discord.com/channels/1215950134874210334/1218106537403220018 <https://discord.com/channels/1215950134874210334/1218106537403220018>____
> 
>             They mainly use 915 Mhz.____
> 
>             __ __
> 
>             Mark____
> 
>             On 13/05/25 14:59, Robin Gilks wrote:____
> 
>                 I'm looking for a radio link that has a bit better range
>                 than an NRF24L01 which I have found doesn't really make
>                 100m reliably. Got some sx1278 modules (for use on
>                 433MHz) on order so I'll be able to experiment but any
>                 pointers or experiences in other than LoRaWAN ?____
> 
>                 __ __
> 
>                 Cheers____
> 
> 
>                 -- ____
> 
>                 Robin Gilks ____
> 
>                 __ __
> 
> 
> 
>                 ____
> 
>                 ___________________________________________________
> 
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