编译树莓派HOST端
官方支持树莓派 + ESP，先在树莓派上试下效果
硬件连接如下图：树莓派+EDSP32-S3 DEVKIT(固件编译同ESP32C3)

树莓派SPI配置，参考https://github.com/espressif/esp-hosted/blob/master/esp_hosted_ng/docs/setup.md

• Raspberry-Pi Setup

  • The SPI master driver is disabled by default on Raspberry-Pi OS. To enable it add following commands in /boot/config.txt file

    dtparam=spi=on
    dtoverlay=disable-bt
    

  • In addition, below options are set as the SPI clock frequency in analyzer is observed to be smaller than expected clock. This is RaspberryPi specific issue.

    core_freq=250
    core_freq_min=250
    

  • Please reboot Raspberry-Pi after changing this file.

• 树莓派编译ESP32 ko文件

  • Host environment setup

    • Execute following commands in root directory of cloned ESP-Hosted repository on Raspberry-Pi

      cd esp_hosted/esp_hosted_ng/host/
      bash rpi_init.sh spi spi
      

    • add ap_support if you want to use interface as access point.

    • This script compiles and loads host driver on Raspberry-Pi. It also creates network interface wlanX which is used as a control interface for Wi-Fi on ESP peripheral
      

• 验证Wi-Fi功能，出现wlan0网卡，连接Wi-Fi后就能上网了

  sudo iw dev wlan0 scan
  sudo iw dev wlan0 scan
  cat ~/open.conf
  network={
    ssid="MY_OPEN_SSID"
    key_mgmt=NONE
  }
  sudo wpa_supplicant -D nl80211 -i wlan0 -c ~/open.conf
  

树莓派验证完成…
参考:

https://github.com/espressif/esp-hosted/blob/master/esp_hosted_ng/docs/setup.md

https://github.com/espressif/esp-hosted/tree/master/esp_hosted_ng

https://pinout.xyz/pinout/spi

https://docs.espressif.com/projects/esp-at/zh_CN/release-v3.0.0.0/esp32c3/Get_Started/Downloading_guide.html