Hi All, I would like to clarify something that I have read on the forum about node authentication: Does OTAA generate keys for ABP authentication? Example communication flow of the application in a common sleep/awake/send: 1: Join with OTAA then store the keys 2: Use stored keys to send data via…

Thanks @ursm , that’s where I read it. But I love to hear from others if this is the correct way to use OTAA. Maybe my question should be: Should all node send one OTAA request to join (assuming its successful) then use ABP to send data unless otherwise told to OTAA join again? Cheers

[image] AdamJP: Should all node send one OTAA request to join (assuming its successful) then use ABP to send data unless otherwise told to OTAA join again? No, not really: OTAA activation gets the device the NwkSKey, AppSKey and DevAdr from the server, plus network settings such as additio…

Does that mean that ABP is always technically on the network when you start a node with it? As in: ABP is “connected” without a GW, but OTAA needs a GW to connect. (i know this means the ABP can’t send data, but theoretically speaking. Thanks!

[image] wheelebigger: ABP is always technically on the network when you start a node with it? If the keys in your device match the keys in the network server (TTN Console), then: technically, maybe, yes; as soon as it transmits a packet using those secrets, the network knows how to handle it.…

Thank you that makes a lot of sense, and should explain why some of my template code for Arduino WAN 1300 claims to be properly sending messages, even though i see nothing on TTN (whilst using ABP). So it’s simply firing it into the atmosphere (or whatever analogy works), and hoping that a GW is cl…

[image] wheelebigger: hoping that a GW is close enough and actually picks it up? Yes. But also: if the keys are wrong , then even when some gateway(s) receive the message, the message might be discarded by the operator (TTN). If you do not have a gateway yourself (so: if you cannot access any…

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OTAA then ABP

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ursm February 6, 2018, 9:00am 2

this could probably help

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