https://devzone.nordicsemi.com/f/nordic-q-a/100635/get-link-quality-from-a-coap-clientHi, I want to get a measure of link quality of a OpenThread network from the CoAP client side. I have used &#39; otThreadGetParentAverageRssi ()&#39; from the client to get RSSI seen from the parent (?), which seems to decrease when distance between the serveren-USTelligent Community 13Fri, 09 Jun 2023 12:55:39 GMThttps://devzone.nordicsemi.com/thread/430248?ContentTypeID=1Fri, 09 Jun 2023 12:55:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5eb6d6e5-6257-4bf3-86df-4dda3ba4b6c5haakonsh<p>Hmm the API docs for <a href="https://openthread.io/reference/group/api-thread-general#otthreadgetparentinfo">otThreadGetParentInfo</a>&nbsp;does not&nbsp;define a list of valid return values, and that is a bit strange given that the function header clearly expects a return value. I suggest you monitor this return value.&nbsp;</p> <p>Also, RSSI is not a direct representation of Link Quality so their values will not match. I don&#39;t know the LQI algorithm that is used for 802.15.4/OpenThread, but I suspect that that it aggregates more datapoints than RSSI, then filter and fuse the data into a single variable called Link Quality.&nbsp;The response-time of the LQI algo is likely way slower than the RSSI sample rate, who is probably updated for every packet received.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/430097?ContentTypeID=1Fri, 09 Jun 2023 05:16:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b677540c-965e-458a-8ab7-a5f6926a2677kaushalyasat<p>Hi, Strange, the link quality seems to be working today. I will keep an eye on this. Are there any conditions this &#39;<span>otThreadGetParentInfo()</span>&#39; could fail? I must confess I have not tested the return value to be &#39;OT_ERROR_NONE&#39;.</p> <p>Cheers,</p> <p>Kaushalya</p><div style="clear:both;"></div>