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Showing content from https://github.com/espressif/esp-hosted below:

espressif/esp-hosted: Hosted Solution (Linux/MCU) with ESP32 (Wi-Fi + BT + BLE)

ESP-Hosted is an open-source solution that enables Espressif SoCs/modules (like ESP32) to act as wireless communication co-processors for external host systems.

It allows host devices (Linux-based systems or microcontrollers, MCUs) to add Wi-Fi and Bluetooth/BLE capabilities via standard interfaces like SPI, SDIO, or UART.

Flexible Connectivity: Wi-Fi + Bluetooth/BLE
Broad Host Support: Works with Linux and MCU-based systems
Multiple Interfaces: SPI, SDIO, UART
Shared Networking: ESP and host can share the same IP address
Power Efficient: Low power modes for battery-powered use cases

📦 High-Level Architecture

ESP-Hosted is available in three main variants:

Best for Linux hosts needing standard Wi-Fi and Bluetooth integration:

Acts as a native 802.11 wireless device
Configurable via cfg80211 / wpa_supplicant
Supports NetworkManager
Bluetooth via standard HCI interface

Designed for Linux hosts, with custom lightweight RPC-based control:

Ethernet 802.3 interface
Wi-Fi configuration via protobuf-based RPC
Fully customizable APIs
Bluetooth via standard HCI
Python or C integration
ESP maintains network when the host is powered off

Optimized for resource-constrained MCUs:

Minimal memory footprint
Wi-Fi configuration via protobuf-based RPC
Power-efficient operation
Ready port of ESP and STM32 as host
Bluetooth via standard HCI
ESP stays connected even when the host is in deep sleep or powered off

Feature ESP-Hosted-NG ESP-Hosted-FG ESP-Hosted-MCU Target Host Linux Linux / MCU MCU Wi-Fi Configuration cfg80211 RPC (protobuf) RPC (protobuf) Network Interface 802.11 Wi-Fi 802.3 Ethernet 802.3 Ethernet Same IP for ESP & Host ❌ ✅ ✅ Power Management ✅ ⌛ Planned ✅ Wi-Fi Modes STA, AP STA, AP, STA+AP STA, AP, STA+AP Bus Interfaces SPI, SDIO, UART (and combos) Same Same Wi-Fi Security WPA, WPA2, WPA3, Open Same Same Standards 802.11 b/g/n/ax, BLE 4.2/5.0/5.3 Same Same Supported ESP Chips ESP32, C2/C3/C6, S2/S3 ESP32, C2/C3/C5/C6, S2/S3 ESP32, C2/C5/C3/C6, S2/S3

⚠️ Note: ESP32-C5 beta support has been added please click on link for more info

🤔 Choosing the Right Variant Use Case Recommended Variant Standard Linux Wi-Fi config (NetworkManager, wpa_supplicant) ESP-Hosted-NG Linux with custom/proprietary control over Wi-Fi ESP-Hosted-FG Embedded Linux platforms (e.g. Raspberry Pi, BeagleBone) NG or FG Minimal resource devices (low RAM/CPU MCUs) ESP-Hosted-MCU Custom networking or duplicate stack (same IP on host & ESP) FG or MCU IoT use cases requiring both BLE and Wi-Fi Any Need for protocol customization / Deep Packet Inspection FG or MCU Classic Bluetooth support All Variants 📚 Documentation & Resources

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