For embedded system designers, if there is a preliminary simulation test for hardware IC evaluation or software development process before the project starts, it will greatly increase the stability of later system design, shorten the development cycle, and budget development costs. This article will introduce how to use Texas Instruments (TI) RF evaluation tool SmartRF Studio to realize the rapid evaluation and development of CC1101.The CC1101 is a low-cost true monolithic UHF transceiver designed for low-power wireless applications. The circuit is mainly set for ISM (Industrial, Scientific and Medical) and SRD (Short Range Device) frequency bands at 315, 433, 868 and 915MHz, but can also be easily set for 300-348MHz, 400-464MHz and 800-928MHz other frequencies. RF radio frequency transceiver integrates a highly configurable modem. This modem supports different modulation formats, and its data transmission rate can reach 500kbps. Performance can be improved by turning on the Forward Error Correction option integrated on the modem. The CC1101 chip provides extensive hardware support for packet processing, data buffering, burst data transmission, clear channel assessment, connection quality indication and electromagnetic wave excitation. The main operating parameters of the CC1100 chip and the 64-bit transmit/receive FIFO (first-in-first-out stack) can be controlled through the SPI interface. modbus over rs485 In a typical system, the CC1101 is used with a microcontroller and a number of passive components. The CC1101 is based on Chipcon's SmartRF04 technology on a 0.18 micron CMOS crystal.