Add Pi Zero headless serial bridge with AP portal and daily RTC-based logs

systemd/serial-bridge.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=Serial Bridge + WiFi Captive Portal + RTC/NTP
+After=network.target wpa_supplicant.service
+Wants=network.target
+
+[Service]
+Type=simple
+User=root
+Group=root
+WorkingDirectory=/opt/serial-bridge/src
+Environment=PYTHONUNBUFFERED=1
+ExecStart=/opt/serial-bridge/.venv/bin/python /opt/serial-bridge/src/main.py
+Restart=always
+RestartSec=3
+
+[Install]
+WantedBy=multi-user.target

systemd/serial-dnsmasq.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Dedicated dnsmasq for serial fallback AP
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/usr/sbin/dnsmasq --keep-in-foreground --conf-file=/etc/serial-bridge/dnsmasq.conf
+Restart=on-failure
+RestartSec=2
+
+[Install]
+WantedBy=multi-user.target

systemd/serial-hostapd.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Dedicated hostapd for serial fallback AP
+After=network.target
+
+[Service]
+Type=simple
+ExecStartPre=/usr/sbin/rfkill unblock wlan
+ExecStart=/usr/sbin/hostapd /etc/serial-bridge/hostapd.conf
+Restart=on-failure
+RestartSec=2
+
+[Install]
+WantedBy=multi-user.target