[Introduction]：E48-433T20S is a domestic cost-effective wireless data transmission module launched by Chengdu Ebyte.It supports frequency hopping, automatic retransmission and other transmission methods, which can be applied to various IoT application scenarios. The wireless module works in the 410~450MHz frequency band, has TTL level output, supports a maximum transmit power of 20dBm, and is compatible with 3.3V IO port voltage. It supports functions such as air wake-up, wireless configuration, relay networking, communication keys, etc. At the same time, the module has a data encryption function. Through strict encryption and decryption algorithms, it ensures data security and improves communication reliability and transmission efficiency.