研究人员在ESP32微控制器中发现了未公开的软件定义无线电（SDR）功能，可以绕过芯片固定的WiFi和蓝牙功能，直接捕获原始IQ基带样本1。该功能支持2.2–2.7 GHz和4.8–6.0 GHz两个频段工作，其中ESP32-C5可覆盖后者范围，采样率最高达80 MS/s，模拟带宽约为13–54 MHz1。在ESP32-S3型号上，可通过千兆以太网接口实现连续数据流传输，速率最高为16 MS/s1。
这一特性已被多个独立项目发现并应用于不同领域1。ESPARGOS团队将其用于方向查找，Reddit用户h0m3us3r于2025年9月26日在GitHub发布了通用SDR实现项目，而C5VRX项目于2025年8月13日首次上传GitHub，用于5.8 GHz频段的FPV视频接收1。
Researchers have uncovered undisclosed software-defined radio (SDR) functionality embedded within ESP32 microcontrollers, enabling the devices to capture raw in-phase and quadrature (IQ) baseband samples across previously unknown frequency bands.1 The ESP32 chips can operate in the 2.2–2.7 GHz range, while the ESP32-C5 variant extends this capability to 4.8–6.0 GHz, with maximum sampling rates reaching 80 megasamples per second and analog bandwidth spanning approximately 13–54 MHz.1
Multiple independent projects have demonstrated this hidden capability for diverse applications. The ESPARGOS team, a Reddit user known as h0m3us3r, and the C5VRX project each discovered and leveraged these SDR features separately.1 The h0m3us3r project was published on GitHub on September 26, 2025, while the C5VRX initiative, which focuses on 5.8 GHz FPV video reception, first appeared on GitHub on August 13, 2025.1 Additionally, the ESP32-S3 can stream data continuously through a gigabit Ethernet interface at rates up to 16 megasamples per second, enabling applications for direction finding and general-purpose SDR implementation.1
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