https://devzone.nordicsemi.com/f/nordic-q-a/62894/distance-and-temperatureHello. I evaluated the effect of temperature and humidity on BLE connection stability. I thought that the effect of humidity was higher than that of temperature, but the effect of temperature was high and the effect of humidity was small. I would likeen-USTelligent Community 13Wed, 24 Jun 2020 01:47:53 GMThttps://devzone.nordicsemi.com/thread/256554?ContentTypeID=1Wed, 24 Jun 2020 01:47:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7019373d-fcd6-4ffc-bdb7-2b99a1d319d0suke<p>haakonsh-san</p> <p>Thank you !</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/256360?ContentTypeID=1Tue, 23 Jun 2020 09:36:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bffd1f78-feae-4bc5-be6f-73476d2e8591haakonsh[quote user=""] RSSI fluctuates due to temperature changes as shown in the attached image. Is this result correct?[/quote] <p>&nbsp;Most likely. The ADC that measures RSSI is not that accurate, especially with respect to temperature. Humidity has little impact on the RSSI-ADC.&nbsp;</p> <p>&nbsp;</p> [quote user=""]Are there any experimental reports of RSSI and communication distance due to changes in temperature and humidity of the Nordic device?[/quote] <p>&nbsp;No, not really.<br /><br /> RSSI&nbsp;is not the actual Received Signal Strength, just an Indication. The actual range you have does not track the RSSI over changes in temperature or humidity.<br />You can determine the range by running a DTM between two devices and looking at the Packet Error Rate at different temperatures.&nbsp;<br />I assumed you&#39;re using a small test chamber, so you will need to use 2.4GHz attenuators and external antennas. <br />Select an attenuation where your PER is close to 30.8% (BT SIG limit for the receiver sensitivity), and re-run the DTM at different temperatures/humidity.&nbsp;<br />The goal is to observe the effect temperature/humidity has on the PER(link quality/range).</p><div style="clear:both;"></div>