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matthijskooijman / arduino-lmic

:warning: This library is deprecated, see the README for alternatives.
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How to test with single channel "gateway"? #113

Open skandragon opened 7 years ago

skandragon commented 7 years ago

I have a need to run a small (aka cheap) single channel gateway that could very well be destroyed at any moment, hence the need for cheap.

I've locked this gateway down to a single frequency and data rate, and would like to configure LMIC to use only this channel, either with ABP, or ideally OTAA. I've tried the example sketches for both, but the gateway does not seem to see the transmissions, if they are even happening.

I've tried to add more debugging by enabling the radio logging (define debug as 2 rather than 0) but the code failed to compile; I've not yet had time to dig into things there.

Is there an example somewhere of using a single channel forwarder with TTN, either with OTAA or ABP?

skandragon commented 7 years ago

I should note that I'm wanting to use a US (NA) frequency.

dragino commented 7 years ago

You can check here for the examples for how to use this library with single channel gateway. http://wiki.dragino.com/index.php?title=Connect_to_TTN

skandragon commented 7 years ago

That example only shows using ABP, which does work -- but is not as attractive as OTAA.

I see my single channel gateway transmitting, but it seems the node doesn't receive. Also, it is still cycling through frequencies:

67954: RXMODE_SINGLE, freq=923300000, SF=7, BW=500, CR=4/5, IH=0
439103: RXMODE_SINGLE, freq=923300000, SF=9, BW=125, CR=4/5, IH=0
450920: TXMODE, freq=903000000, len=23, SF=8, BW=500, CR=4/5, IH=0
763159: RXMODE_SINGLE, freq=923300000, SF=7, BW=500, CR=4/5, IH=0
824307: RXMODE_SINGLE, freq=923300000, SF=9, BW=125, CR=4/5, IH=0
1079896: TXMODE, freq=913100000, len=23, SF=8, BW=125, CR=4/5, IH=0
1396280: RXMODE_SINGLE, freq=926900000, SF=8, BW=500, CR=4/5, IH=0
1458524: RXMODE_SINGLE, freq=923300000, SF=9, BW=125, CR=4/5, IH=0
1508949: TXMODE, freq=912600000, len=23, SF=8, BW=500, CR=4/5, IH=0
avbentem commented 6 years ago

https://www.thethingsnetwork.org/forum/t/can-lmic-1-6-be-set-up-to-use-a-single-channel-and-sf/5207/11 might help, but only supports OTAA when it succeeds in its very first try, and was not tested for US. (Please respond there as well if you figured out if changes are needed.)