How to send large data over Lora?

[ahanley409]

Hi, I am under the assumption based on my research that sending data over lora is limited to 64 - 256 bytes per packet? Is this true? I was curious how it would be possible to send larger data say like 1MB or more? I am assuming i'd have to cut the data up then stitch them back together on the receiving end but am having trouble with how to accomplish this and was hoping to get some help or direction.

thanks in advance!

[littlebat]

There are a few keys here. One is that beartooth is using both lora and FSK modulations with p2p and not lorawan. FSK will give higher datarate. Two is that there is not a 1% duty cycle limitation on 915mhz in us like 868mhz in Europe. There are still power restrictions.

Would love to see an open source beartooth clone with 2 lopy's. Beartooth and gotenna are cool but too expensive, I just stick to cheap 2-way radios for now.

[MM_BTR]

@livius yes it is legal!
https://apps.fcc.gov/oetcf/eas/reports/ViewExhibitReport.cfm?mode=Exhibits&RequestTimeout=500&calledFromFrame=N&application_id=grz7JNktqwfpYW%2BogF7SyQ%3D%3D&fcc_id=2AJY7007

[papasmurph]

@livius I don't know. I'm just introduced to LoRa, so I have a hard time keeping up as it is :).

[livius]

@papasmurph
Is this legal?

[papasmurph]

@livius See https://www.beartooth.com/# 900 MHz Digital Transceiver (US Spec: 902MHz - 928MHz), FSK and LoRa Modulation with Frequency Hopping etc

[livius]

@papasmurph said in How to send large data over Lora?:

If there's no mobile coverage it uses long range radio

What does he use? And on what frequency?

[papasmurph]

@livius If there's no mobile coverage (or maybe otherwise too) it uses long range radio and connecting only to equal devices on others' phones. In other words Beartooth to Beartooth. That's the interpretation I can make from this: https://www.beartooth.com/

[livius]

@robert-hh
Then this is not the Lora only normal cell calling?
Maybe i do not understand this correctly - but they talking about talking directly from phone to phone?
Then without cell operator - how?

[robert-hh]

@livius Looking at the web site, the beartooth seems to be an add-on to a cellphone, more or less a backup-battery with a add-ons. For long range communication the cell phone seems to be required, and that device just connects with the cell phone.

[papasmurph]

@ahanley409 You could connect to a WiFi access point directly from the LoPy, or you could attach a cell/mobile modem via a serial port. LoRa is simply not designed for transfer of a lot of data. It's optimized for long ranges and battery-powered devices.

[livius]

@MM_BTR
If you are here - plese tell us how it is possible with so limited bandwidth by law
to transfer something more then few bytes on free channels?
Or maybe you do not use free channels?

[MM_BTR]

@livius @ahanley409 Beartooth is definitely a real product, built by a real company. We originally built radio gear for private customers and then last year launched our flagship LoRa FHSS product to the public. We have shipped several 1,000 units to happy customers and ship more and more each week. Send us a note at support@beartooth.com if you want to learn more. Michael (Beartooth CEO).

[livius]

@ahanley409 said in How to send large data over Lora?:

https://gearjunkie.com/beartooth-radio-device

If you read comments it smell as fraud.
I do not suppose that on free bandwidth it is possible.

Are these regulations just for Europe? Do they also apply to the US and Canada?

i am not an expert in Lora - but if i remember US have little less limits but still limits.

(something other then wifi)
Please define long range - bacause Wifi can also accomplish quite long range data transmission with directional antennas

But once again i do not suppose that on free bandwidth it is possible. You have limited power by law on free channels.

[ahanley409]

Hi Livius,

Thanks for providing me that link to the data rates however i will admit i wasn't aware of any Fair Access Policy when it comes to Lora and might have reconsidered purchasing these modules as my bandwidth requirements are quite high. I found an example of a product claiming to be able to send pictures, video and voice over Lora and am curious how you think this is possible? https://gearjunkie.com/beartooth-radio-device

• Are these regulations just for Europe? Do they also apply to the US and Canada?

• If i just want to test for development purposes and send large data in an isolated setting i'm assuming it's possible and these are just recommendations / guidelines for production is that a correct assumption?

• Now if Lora is not meant for high bandwidth do you have a recommendation for what is? Do you carry a product or know of a product (something other then wifi) that can send large data over long range?

[livius]

@ahanley409
This is because of international law regulations
https://www.thethingsnetwork.org/forum/t/limitations-data-rate-packet-size-30-seconds-uplink-and-10-messages-downlink-per-day-fair-access-policy/1300

and Lora in that matter is not designed to send 1MB of data - of course you can but you must wait long to send such amount of data