5 ms·

I guess my only advice is make sure the software keeps to the duty cycle limits of the license free band. And note that different countries may have different r

I guess my only advice is make sure the software keeps to the duty cycle limits of the license free band. And note that different countries may have different regulations on what is allowed on the frequency LoRa uses, if using it is even allowed.

punkgeek 7y ago
Oh yes, totally agree. We have a rough duty cycle spreadsheet now and we will be careful to obey the rules ;-)
- myself248 7y ago
  That's the nice thing about 915 in the US, it's basically do-whatever. Not the case with 315/433, though! I'm a huge fan of 900MHz meshes, and have a basement full of Ricochet hardware. Starmode chat was the coolest thing in the world, but GPS's were expensive back then, so mobile nodes didn't know where they were. Stationary routers were programmed with their lat/lon when they were installed, and the MCDN mesh did geographic (distance-bearing) routing within them. On the Meshtastic site, it says the TTgo board is recommended "for most users", without saying why. It looks like this is because the GPS is built into the TTgo board but not the Heltec, but this isn't clearly explained. I picked up a few of the Heltec boards recently, because they were much more commonly available. I assume I can tack on a GPS to some random UART pins and tweak some pin assignments in a header file somewhere? If I have stable power and a high point somewhere, I'd be interested in running a repeater node that helps _everyone_'s traffic, not just my own friends who have the same encryption key loaded or whatever. Is there a way to do that, or can that be added as a feature request? Is there support for arbitrary data transport over the Lora layer; could I ssh from my phone, across the meshtstic lora, to my desktop at home sitting near another node?
  - ourlordcaffeine 7y ago
    >Is there support for arbitrary data transport over the Lora layer Seconding this, I am thinking about making ultra-remote seismometers that send back (highly compressed and carefully selected) readings via something like LoRa. I could use this as the transport layer and only have to worry about the sampling and processing. (Yes - I know about the raspberry shake. It has a lot of flaws with the design which is why I'm going for the redesign)
bigiain 7y ago
Also which of the ISM bands are valid in which country. (We sold off the bottom half the 915 band here to telcos, so only the upper half of it is available in .au)
- punkgeek 7y ago
  ooh. good to know. here's what we are doing now for the regions we know. Someone is sending in a PR soon for the extra 440ish band in EU soon. https://github.com/meshtastic/Meshtastic-esp32/blob/master/src/MeshRadio.h#L12 https://github.com/meshtastic/Meshtastic-esp32/blob/master/s...
  - bigiain 7y ago
    If you'd like some reference: https://www.acma.gov.au/step-2-show-your-product-complies https://www.acma.gov.au/step-2-show-your-product-complies Says: (2) The 900 MHz ISM band within Australia is 915–928 MHz. 900 MHz ISM devices working outside of this range cannot be operated in Australia (that is, ISM devices that use the frequencies 902–915 MHz are not authorised for use within Australia). (3) Using the frequency range 902–915 MHz would interfere with Australian mobile telephone networks. Severe criminal penalties, including fines of up to $255,000, exist under the Radiocommunications Act 1992 for interfering with radiocommunications services.
  - ourlordcaffeine 7y ago
    I think it would be very helpful to other hobbyists if once you have worked out all the limitations in each country, to make a guide or infographic about all the rules and limitations.
- dfox 7y ago
  And in EU the whole 915MHz ISM band simply does not exist and is “the original GSM band” with the added caveat that there are some safety critical services inside the GSM's uplink/downlink guard band.

punkgeek 7y ago

Oh yes, totally agree. We have a rough duty cycle spreadsheet now and we will be careful to obey the rules ;-)

myself248 7y ago
That's the nice thing about 915 in the US, it's basically do-whatever. Not the case with 315/433, though! I'm a huge fan of 900MHz meshes, and have a basement full of Ricochet hardware. Starmode chat was the coolest thing in the world, but GPS's were expensive back then, so mobile nodes didn't know where they were. Stationary routers were programmed with their lat/lon when they were installed, and the MCDN mesh did geographic (distance-bearing) routing within them. On the Meshtastic site, it says the TTgo board is recommended "for most users", without saying why. It looks like this is because the GPS is built into the TTgo board but not the Heltec, but this isn't clearly explained. I picked up a few of the Heltec boards recently, because they were much more commonly available. I assume I can tack on a GPS to some random UART pins and tweak some pin assignments in a header file somewhere? If I have stable power and a high point somewhere, I'd be interested in running a repeater node that helps _everyone_'s traffic, not just my own friends who have the same encryption key loaded or whatever. Is there a way to do that, or can that be added as a feature request? Is there support for arbitrary data transport over the Lora layer; could I ssh from my phone, across the meshtstic lora, to my desktop at home sitting near another node?
- ourlordcaffeine 7y ago
  >Is there support for arbitrary data transport over the Lora layer Seconding this, I am thinking about making ultra-remote seismometers that send back (highly compressed and carefully selected) readings via something like LoRa. I could use this as the transport layer and only have to worry about the sampling and processing. (Yes - I know about the raspberry shake. It has a lot of flaws with the design which is why I'm going for the redesign)

bigiain 7y ago

Also which of the ISM bands are valid in which country. (We sold off the bottom half the 915 band here to telcos, so only the upper half of it is available in .au)

punkgeek 7y ago
ooh. good to know. here's what we are doing now for the regions we know. Someone is sending in a PR soon for the extra 440ish band in EU soon. https://github.com/meshtastic/Meshtastic-esp32/blob/master/src/MeshRadio.h#L12 https://github.com/meshtastic/Meshtastic-esp32/blob/master/s...
- bigiain 7y ago
  If you'd like some reference: https://www.acma.gov.au/step-2-show-your-product-complies https://www.acma.gov.au/step-2-show-your-product-complies Says: (2) The 900 MHz ISM band within Australia is 915–928 MHz. 900 MHz ISM devices working outside of this range cannot be operated in Australia (that is, ISM devices that use the frequencies 902–915 MHz are not authorised for use within Australia). (3) Using the frequency range 902–915 MHz would interfere with Australian mobile telephone networks. Severe criminal penalties, including fines of up to $255,000, exist under the Radiocommunications Act 1992 for interfering with radiocommunications services.
- ourlordcaffeine 7y ago
  I think it would be very helpful to other hobbyists if once you have worked out all the limitations in each country, to make a guide or infographic about all the rules and limitations.
dfox 7y ago
And in EU the whole 915MHz ISM band simply does not exist and is “the original GSM band” with the added caveat that there are some safety critical services inside the GSM's uplink/downlink guard band.