Build ESP32 Video & Audio Calling With VideoSDK

VideoSDK’s IoT SDK enables ESP32-S3 microcontrollers to participate directly in encrypted WebRTC audio and video rooms alongside browser and mobile clients, avoiding the need to build a separate signaling or media backend. Distributed as an MIT-licensed ESP-IDF component, the SDK manages room connections, DTLS/SRTP security, and media lifecycles while firmware initializes the device with a VideoSDK token and room ID, then starts publishing or subscribing to audio and video streams through a small set of functions. Hardware capabilities differ: the XIAO ESP32-S3 Sense can transmit camera and microphone media but lacks display and speaker output, while the ESP32-S3-Korvo-2 supports full two-way calling through integrated camera, microphone, LCD, and speaker hardware. Setup requires ESP-IDF 5.4.4 or later, Python 3.11+, at least 8 MB flash with PSRAM, Wi-Fi credentials, and VideoSDK authentication details; developers configure these settings, build and flash the example firmware, and join the same room using a companion React or JavaScript web client. The guide notes that memory, Wi-Fi quality, token security, and network UDP availability are important operational concerns, while the SDK’s data channel can also support device-control messages such as sensor queries or actuator commands. For projects requiring self-hosted signaling or an existing custom SFU, Espressif’s alternative WebRTC solution may be more suitable.

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