![]() I hope this answers your question, and I hope to see you at RFID Journal LIVE! 2020, where you could talk to a variety of companies about the issue you are facing. Simply using a sheet of Mylar to block energy from the area where you are getting stray reads should solve the problem. If this doesn't work, I would recommend shielding. The best way to deal with stray reads is to attenuate the antenna output so that you are not reading tags beyond the intended area. Here is a table that tells you what the level needs to be for good performance. ![]() The further away the device is from the Wi-Fi hotspot, the lower the value of RSSI. However, this probably would not be the best way to deal with stray tag reads because RSSI numbers are imperfect due to multipath problems (in other words, the RSSI value from a tag farther away could be higher because the signal bounced off of some metal in the environment). What does RSSI value in a Wi-Fi network mean RSSI stands for Received Signal Strength Indicator. That is, you could create an application that would take the RSSI value at the time of each tag read and have it pass along to a back-end system only those tag reads with a strong RSSI value (indicating tagged items that were close to the antenna and were meant to be read), while not passing along reads associated with low RSSI numbers. You could use the received signal strength indicator value to filter out stray reads using software. Or else one converted by an incorrect formula. Figures 4a, 4b, and 4c show the RSSI values versus distance for all the. In addition to being the RSSI of the downlink not the uplink, a value of 20 is obviously not a reading of RF power in dBm, but probably a raw value from a chip register. Each data point is the average RSSI value recorded for 20 packets, b) The effect. That’s because, depending on the environment, a router picks a dBm value that works best with the seamless. In this case, you can adjust the dBm value of the Roaming assistant setting for each frequency band (2.4GHz, 5GHz, or 6GHz). When passive tags and fixed portals are deployed (such as for a dock door), could the received signal strength indicator values be of any use in trying to eliminate bounced reads? For instance, could we turn down the sensitivity setting and reduce the RSSI? the RSSI value shown by Arduino is about 20. Note the default received Wi-Fi signal strength (RSSI) which is -70 dBm.
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