https://test-devzone.nordicsemi.com/f/nordic-q-a/89004/nrf9160-upload-data-from-aws-shadow-subscribe-xmqttevt-1--128We use nRF9160 on our own board. The firmware &quot;Serial lte modem&quot; is installed on the chip with a connection to an external MCU (#define MQTT_MESSAGE_BUFFER_LEN 8192) We need to receive from AWS Broker the JSON messages more significant than 2000 bytesen-USTelligent Community 13 Non-ProductionThu, 16 Jun 2022 08:04:11 GMThttps://test-devzone.nordicsemi.com/thread/372728?ContentTypeID=1Thu, 16 Jun 2022 08:04:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3a2b8278-21c9-4ce8-b133-205938d794a2user113512<p>I also see that there is no problem when I load JSON of the form:<br /><pre class="ui-code" data-mode="text">{ &quot;state&quot;: { &quot;desired&quot;: { &quot;userColor&quot;: 0, &quot;debugMode&quot;: 1, &quot;operMode&quot;: 2, &quot;sosMode&quot;: 0, &quot;algo&quot;: { &quot;petType&quot;: 0, &quot;collarSize&quot;: 0, &quot;age&quot;: 1, &quot;breed&quot;: 0, &quot;gender&quot;: 0, &quot;healthStatus&quot;: 0, &quot;medicalCondition&quot;: 0, &quot;weight&quot;: 1 } } } }</pre><br /><br />But as soon as a nested embedded array in JSON, the load immediately crashes:<br /><pre class="ui-code" data-mode="text">{ &quot;state&quot;: { &quot;desired&quot;: { &quot;userColor&quot;: 0, &quot;debugMode&quot;: 1, &quot;operMode&quot;: 2, &quot;sosMode&quot;: 0, &quot;algo&quot;: { &quot;petType&quot;: 0, &quot;collarSize&quot;: 0, &quot;age&quot;: 1, &quot;breed&quot;: 0, &quot;gender&quot;: 0, &quot;healthStatus&quot;: 0, &quot;medicalCondition&quot;: 0, &quot;weight&quot;: 1 }, &quot;safeZone&quot;: [], &quot;communicationChannels&quot;: [ { &quot;channel&quot;: &quot;BLE&quot;, &quot;state&quot;: 1, &quot;timeout&quot;: 20000 }, { &quot;channel&quot;: &quot;WIFI&quot;, &quot;state&quot;: 1, &quot;timeout&quot;: 20000 }, { &quot;channel&quot;: &quot;CELLULAR&quot;, &quot;state&quot;: 1, &quot;timeout&quot;: 20000 } ] } } }</pre></p><div style="clear:both;"></div>