[HN Gopher] DIY Smartphone Lora Connection (2021)
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DIY Smartphone Lora Connection (2021)
Author : walterbell
Score : 34 points
Date : 2022-07-06 13:00 UTC (10 hours ago)
(HTM) web link (www.hackster.io)
(TXT) w3m dump (www.hackster.io)
| [deleted]
| gh0st42 wrote:
| Making LoRa (not LoRaWAN) available to smartphones can also be
| achieved through general purpose modem firmwares for, e.g., esp32
| boards that also contain lora transceivers.
|
| The rf95modem firmware exposes LoRa for D2D communication via
| serial/usb or BLE with AT modem commands and works with many
| different boards. https://github.com/gh0st42/rf95modem
|
| Full disclaimer: I am the author of rf95modem :)
| KennyBlanken wrote:
| It's a bit of a shame that you started another LoRa based
| messaging system instead of contributing to the several
| existing projects.
|
| None of them has achieved critical mass, and none of them will
| if everyone interested in the subject insists on making their
| own.
|
| Andreas Spiess covers several mesh networking/messaging systems
| here:
|
| https://www.youtube.com/watch?v=TY6m6fS8bxU
| entropy47 wrote:
| https://xkcd.com/927/
| tomasgvivo wrote:
| I would love to see this work with NFC as the communication
| medium between the phone and the LoRa module so it can free the
| phone's USB port.
| killingtime74 wrote:
| Lora has very low data rates no?
| buescher wrote:
| At the application level for Lora, meshtastic looks nice,
| especially coupled with an android phone and ATAK. I haven't
| bought hardware for it yet. I assume the approach in the OP would
| need drivers.
| https://meshtastic.org/docs/software/community/community-ata...
| contingencies wrote:
| Manufacturer page @ https://www.hoperf.com/
|
| It appears there are three identically priced models available:
| RFM96 (433MHz), RFM95 (868MHz), RFM95 (915MHz) and the slightly
| cheaper RFM98 (433MHz).
|
| There are allegedly also extended range and power modules
| available with the 'PW' suffix, offering _low receive
| sensitivity(-136dBm) coupled with Enhanced +30dBm output power_ ,
| but these do not appear to be in wide retail distribution so I
| didn't find a pricing source.
|
| They also claim to offer sub-GHz transceivers in similar module
| form factors but again no visible distribution so perhaps not yet
| available.
|
| Meshtastic hardware list @ https://meshtastic.org/docs/hardware
| appears to be mostly LilyGo-branded modules which are based on
| Semtech ICs https://www.semtech.com/products/wireless-rf/lora-
| core/
|
| Most promising embedded lib @ https://github.com/jgromes/RadioLib
| which supports both manufacturers' IC families across numerous
| architectures.
| KennyBlanken wrote:
| FYI the different frequency bands are for different regulatory
| markets, and one should figure out which module is legal in
| their country before buying.
|
| Before buying a module, I would recommend watching Andreas
| Spiess's youtube videos on LoRa; he has several.
| contingencies wrote:
| The sub-GHz hardware is non-LoRa ISM-spectrum. However, again
| this has differences in specific subspectrum licensing. While
| learning about radio regulation is perhaps interesting to
| some people and arguably important, practically speaking this
| stuff is not high power so it would be hard to cause problems
| with it.
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(page generated 2022-07-06 23:00 UTC)