In the last episode, we conducted in-depth discussions on the scanning performance of iData T1. I believe you are no longer strange to "fast scanning", "long-time scanning" and "wide-range scanning". However, the data collected by code scanning still need to be uploaded, so as to achieve an effective data collection. Of course, Wi-Fi is indispensable for the uplink and downlink of data. We will wait and see how excellent iData T1 Wi-Fi performs. Let's learn some basic knowledge about Wi-Fi performance before the test starts. How to judge the performance of Wi-Fi? Generally, when connecting Wi-Fi, we all look at the icon of the signal intensity, that is, the small sign with three arcs and one point. The more arc line, the better the signal. Its scientific name is RSSI signal intensity, shown in the unit of dBm. Usually, dBm is a negative number, because attenuation will occur in signal transmission, and the transmitted signal cannot be fully received. If it is fully received, the dBm value is 0, so the smaller the negative dBm value, the better the signal.
iData T1 Wi-Fi Performance test
Contrast test of RSSI signal intensity
There are many factors that can affect the signal intensity, not just the quality of the equipment. The performance of AP and whether there is interference from other Wi-Fi sources in the surrounding environment will make the dBm value fluctuate greatly. So we put iData T1 and another device in the same environment for comparative testing. Action principle of PA amplifier