Buildroot + Raspberry Pi Zero W: Hotspot (hostapd/dnsmasq) startet nicht

# -----------------------

# Architecture

BR2_arm=y

BR2_arm1176jzf_s=y

BR2_ARM_EABIHF=y

# -----------------------

# Toolchain (Optimiert: Headers fixieren)

BR2_KERNEL_HEADERS_6_1=y

BR2_TOOLCHAIN_BUILDROOT_GLIBC=y

BR2_TOOLCHAIN_BUILDROOT_WCHAR=y

BR2_TOOLCHAIN_BUILDROOT_CXX=y

# -----------------------

# System / Init

BR2_TARGET_GENERIC_HOSTNAME="yio-remote"

BR2_TARGET_GENERIC_ISSUE="YIO Remote (Minimal)"

BR2_INIT_SYSTEMD=y

# Wir nutzen systemd-networkd für minimalen Overhead

BR2_PACKAGE_SYSTEMD_NETWORKD=y

BR2_PACKAGE_SYSTEMD_RESOLVED=y

# ttyS0 ist korrekt für den Pi Zero (Mini-UART)

BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"

BR2_TARGET_GENERIC_BAUDRATE_115200=y

# -----------------------

# Kernel (Nutzt dein Fragment)

BR2_LINUX_KERNEL=y

BR2_LINUX_KERNEL_CUSTOM_GIT=y

BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/raspberrypi/linux.git"

BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="rpi-6.1.y"

BR2_LINUX_KERNEL_DEFCONFIG="bcmrpi"

BR2_LINUX_KERNEL_DTS_SUPPORT=y

BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2708-rpi-zero-w"

BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="../board/remote/configs/remote_kernel.config"

# -----------------------

# Raspberry Pi Infrastructure

BR2_TARGET_RPI_FIRMWARE=y

BR2_TARGET_RPI_FIRMWARE_VARIANT_PI_ZERO_W=y

# DTS Overlays werden für dein sharp.dtbo benötigt

BR2_TARGET_RPI_FIRMWARE_INSTALL_DTB_OVERLAYS=y

# -----------------------

# WLAN & Networking

BR2_PACKAGE_LINUX_FIRMWARE=y

# Nur das absolut Nötige für den Pi Zero W Chip (Cypress/Broadcom 43430)

BR2_PACKAGE_LINUX_FIRMWARE_BRCM_BCM43XXX=y

BR2_PACKAGE_WPA_SUPPLICANT=y

BR2_PACKAGE_WPA_SUPPLICANT_NL80211=y

BR2_PACKAGE_WPA_SUPPLICANT_DBUS=y

# -----------------------

# SSH & Utilities (Lightweight)

BR2_PACKAGE_DROPBEAR=y

BR2_PACKAGE_DROPBEAR_SMALL=y

# Hilft gegen "Entropy Starvation" beim Booten auf langsamen CPUs

BR2_PACKAGE_HAVEGED=y

# I2C Tools für deinen Check

BR2_PACKAGE_I2C_TOOLS=y

# -----------------------

# Filesystem & Image

BR2_ROOTFS_OVERLAY="../board/remote/root-overlays"

BR2_ROOTFS_POST_BUILD_SCRIPT="../board/remote/post-build.sh"

BR2_ROOTFS_POST_IMAGE_SCRIPT="../board/remote/post-image.sh"

# Nur ext4 aktivieren (ext2 Definitionen entfernt für Konsistenz)

BR2_TARGET_ROOTFS_EXT4=y

BR2_TARGET_ROOTFS_EXT4_SIZE="256M"

BR2_TARGET_ROOTFS_EXT4_DISABLE_JOURNALING=y

# Tools für Genimage

BR2_PACKAGE_HOST_DOSFSTOOLS=y

BR2_PACKAGE_HOST_MTOOLS=y

BR2_PACKAGE_HOST_GENIMAGE=y

BR2_TARGET_IMAGES_USE_CUSTOM_GENIMAGE=y

BR2_TARGET_GENIMAGE_CONFIG="../board/remote/genimage.cfg"

BR2_PACKAGE_HOSTAPD=y

BR2_PACKAGE_HOSTAPD_DRIVER_NL80211=y

BR2_PACKAGE_HOSTAPD_HAS_WIFI_DRIVERS=y

# You also need a DHCP server to give IPs to connecting devices

BR2_PACKAGE_DNSMASQ=y

BR2_PACKAGE_SYSTEMD_RFKILL=y

BR2_PACKAGE_UTIL_LINUX_RFKILL=y

BR2_PACKAGE_HAS_UDEV=y

BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y

# =====================================

# SYSTEMD CORE REQUIREMENTS (Wasserdicht)

# =====================================

CONFIG_CGROUPS=y

CONFIG_CGROUP_FREEZER=y

CONFIG_CGROUP_DEVICE=y

CONFIG_CGROUP_CPUACCT=y

CONFIG_CGROUP_PIDS=y

CONFIG_CGROUP_BPF=y

CONFIG_NAMESPACES=y

CONFIG_USER_NS=y

CONFIG_PID_NS=y

CONFIG_NET_NS=y

CONFIG_DEVTMPFS=y

CONFIG_DEVTMPFS_MOUNT=y

CONFIG_FHANDLE=y

CONFIG_AUTOFS4_FS=y

CONFIG_SIGNALFD=y

CONFIG_TIMERFD=y

CONFIG_EPOLL=y

CONFIG_INOTIFY_USER=y

CONFIG_SYSFS=y

CONFIG_PROC_FS=y

CONFIG_DMIID=y

CONFIG_UNIX=y

CONFIG_INLINE_SPIN_UNLOCK_IRQ=y

# --- HARDWARE CORE (UART, I2C, SPI) ---

CONFIG_SERIAL_AMBA_PL011=y

CONFIG_SERIAL_AMBA_PL011_CONSOLE=y

CONFIG_I2C=y

CONFIG_I2C_CHARDEV=y

CONFIG_I2C_BCM2835=y

CONFIG_SPI=y

CONFIG_SPI_MASTER=y

CONFIG_SPI_BCM2835=y

CONFIG_RASPBERRYPI_FIRMWARE=y

CONFIG_MMC=y

CONFIG_MMC_BCM2835=y

CONFIG_GPIOLIB=y

CONFIG_GPIO_SYSFS=y

CONFIG_LEDS_GPIO=y

# --- NETWORKING & WLAN ---

CONFIG_NET=y

CONFIG_INET=y

CONFIG_WIRELESS=y

CONFIG_CFG80211=y

CONFIG_BRCMFMAC=y

CONFIG_BRCMFMAC_SDIO=y

CONFIG_IP_MULTICAST=y          

# --- FILESYSTEMS ---

CONFIG_EXT4_FS=y

CONFIG_VFAT_FS=y

CONFIG_TMPFS=y

CONFIG_TMPFS_POSIX_ACL=y

# --- OPTIMIZATION ---

CONFIG_CC_OPTIMIZE_FOR_SIZE=y

CONFIG_KERNEL_XZ=y

CONFIG_RFKILL=y

CONFIG_RFKILL_INPUT=y

# --- WICHTIG FÜR WLAN-HOTSPOT ---

CONFIG_MAC80211=y                 # WLAN-Framework (wichtig für hostapd)

CONFIG_CFG80211_WEXT=y             # Kompatibilität mit WLAN-Tools

CONFIG_PACKET=y                    # Für raw sockets (hostapd benötigt das)

# --- NETZWERK GRUNDLAGEN ---

CONFIG_NETFILTER=y                 # Für Firewall (optional)

CONFIG_NETFILTER_ADVANCED=y

CONFIG_NF_CONNTRACK=y              # Connection tracking

CONFIG_NF_NAT=y                    # Network Address Translation

# --- FÜR BESSERES DEBUGGING ---

CONFIG_DEBUG_FS=y                  # Für Debug-Informationen

CONFIG_DYNAMIC_DEBUG=y              # Detaillierte Kernel-Logs

CONFIG_MAGIC_SYSRQ=y                # SysRq für Notfälle

├── etc

│   ├── dnsmasq.conf

│   ├── hostapd.conf

│   ├── modules-load.d

│   │   └── modules.conf

│   ├── network

│   └── systemd

│       ├── network

│       │   └── 20-wlan0.network

│       └── system

│           ├── dnsmasq.service

│           ├── hostapd.service

│           └── multi-user.target.wants

├── root

│   └── splash.png

└── usr

    └── bin

[Unit]

Description=Hostapd IEEE 802.11 AP, Cloud and Data Server

After=sys-subsystem-net-devices-wlan0.device

Before=network.target

Wants=network.target

[Service]

Type=simple

ExecStartPre=-/usr/sbin/rfkill unblock wifi

# Set a static IP for the Pi so clients know where the gateway is

ExecStart=/usr/sbin/hostapd /etc/hostapd.conf

[Install]

WantedBy=multi-user.target

[Unit]

Description=DNSmasq DHCP and DNS Server

# Wait for the WiFi interface to be initialized

After=hostapd.service

Wants=hostapd.service

Before=multi-user.target

[Service]

Type=simple

# Ensure we don't start until hostapd has likely initialized the interface

ExecStartPre=/usr/bin/sleep 2

# -k keeps it in the foreground for systemd

# -C points to your config file

ExecStart=/usr/sbin/dnsmasq -k -C /etc/dnsmasq.conf

Restart=on-failure

RestartSec=5

[Install]

WantedBy=multi-user.target