[chbot] LoRa peer to peer

[Robin Gilks]

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>
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/
>
> Richard
>
> On Tue, May 13, 2025 at 5:08 PM Daniel Powell <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> *On
>> Behalf Of *Mark Beckett
>> *Sent:* Tuesday, 13 May 2025 4:53 pm
>> *To:* 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
>>
>> 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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