Wi-Fi and Bluetooth are in the same frequency band, will there be conflicts?

Will conflict, but will cause performance degradation, generally will not lead to unavailability. The interference between WIFI and Bluetooth is not serious, because the physical layer uses different protocols. Bluetooth uses frequency hopping (FHSS) and WIFI uses embedded spread spectrum technology (DSSS). Using frequency hopping can improve the anti-interference performance. Of course, this anti-interference ability is limited. When the channel is full (there are multiple WIFI AP using different channels) and there is a lot of data transmission (occupying a lot of bandwidth), the performance will still decrease, but for normal use, there will be no situation that the service cannot be provided at all. The interference between WIFI and zigbee is more serious, because they both use the same modulation method and have different CSMA/CA protocols in the physical layer, which leads to zigbee being at a disadvantage when competing for channels in collision avoidance. If they use the same channel (overlapping bandwidth), once WIFI sends data, zigbee will be directly unavailable.