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Lee Lup Yuen 2022-01-23 04:21:59 +00:00
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6
articles/lorawan3.html
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@ -954,6 +954,12 @@ chirpstack-network-server[5749]:
<p><a href="https://lupyuen.github.io/articles/lorawan3#appendix-random-number-generator-with-entropy-pool"><strong>“Random Number Generator with Entropy Pool”</strong></a></p>
</li>
<li>
<p>Another way to check for <strong>Duplicate Nonce</strong>: Click…</p>
<p><strong>Applications</strong> → <strong>app</strong> → <strong>device_otaa_class_a</strong> → <strong>Device Data</strong></p>
<p>Look for <strong>“validate dev-nonce error”</strong>…</p>
<p><img src="https://lupyuen.github.io/images/auto-nonce.png" alt="Duplicate LoRaWAN Nonce" /></p>
</li>
<li>
<p>Disable all <strong>Info Logging</strong> on NuttX</p>
<p>(See <strong>“LoRaWAN is Time Sensitive”</strong> below)</p>
</li>

8
articles/wisgate.html
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@ -515,6 +515,10 @@ level=error
msg=&quot;validate dev-nonce error&quot;
dev_eui=4bc15ee7377bb15b
type=OTAA</code></pre></div>
<p>Another way to check for <strong>Nonce Errors</strong>: Click…</p>
<p><strong>Applications</strong> → <strong>app</strong> → <strong>device_otaa_class_a</strong> → <strong>Device Data</strong></p>
<p>Look for <strong>“validate dev-nonce error”</strong>…</p>
<p><img src="https://lupyuen.github.io/images/auto-nonce.png" alt="Duplicate LoRaWAN Nonce" /></p>
<p>We’ll talk about Message Integrity Code and Nonce in a while.</p>
<h2 id="snoop-with-software-defined-radio" class="section-header"><a href="#snoop-with-software-defined-radio">7.3 Snoop with Software Defined Radio</a></h2>
<p>To verify the actual frequency that our LoRaWAN Device is transmitting on, we may sniff the airwaves with a <strong>Software Defined Radio</strong>.</p>
@ -624,6 +628,10 @@ time=&quot;2021-04-28T04:02:41+01:00&quot;
level=error
msg=&quot;uplink: processing uplink frame error&quot; ctx_id=01ae296e-8ce1-449a-83cc-fb0771059d89
error=&quot;validate dev-nonce error: object already exists&quot;</code></pre></div>
<p>Nonce errors will also appear in ChirpStack. Click…</p>
<p><strong>Applications</strong> → <strong>app</strong> → <strong>device_otaa_class_a</strong> → <strong>Device Data</strong></p>
<p>Look for <strong>“validate dev-nonce error”</strong>…</p>
<p><img src="https://lupyuen.github.io/images/auto-nonce.png" alt="Duplicate LoRaWAN Nonce" /></p>
<p>Here’s the LoRaWAN Spec for the Nonce and Message Integrity Code…</p>
<p><img src="https://lupyuen.github.io/images/wisgate-join2.png" alt="Join LoRaWAN Network Request" /></p>
<p>For other LoRaWAN Packets (besides the Join Network Request), the Message Integrity Code is computed differently…</p>