How to rectify EMC issues related to wireless data packet loss in power DTUs?

To address packet loss in DTU wireless communication, it's crucial to pinpoint the interference source and optimize the design. Using a spectrum analyzer to scan the noise bands where packet loss occurs reveals common interference sources such as switching power supplies and clock harmonics. Strengthen power supply filtering by adding a common-mode inductor (CML4532A-510T) and capacitors. Optimize antenna placement by keeping it away from metal objects. Add a shielding cover to cover the wireless module. On the software side, adjust the transmit power and retransmission mechanism. After these improvements, the packet loss rate should decrease from 5% to below 0.1% under the same conditions. Systematic improvements can enhance the reliability of wireless communication.