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feat(network): wlan0 fallback if T3U dongle is absent

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- PRIMARY_INTERFACE=wlan1, FALLBACK_INTERFACE=wlan0
- resolve_interface() checks /sys/class/net at startup and picks whichever exists
- INTERFACE is module-level, so all functions use the correct iface automatically
- restore_fallback() now also tries home-wifi-fb / Hotspot on wlan0 if wlan1 is primary but failed
- install_netwatch.sh creates home-wifi-fb profile on wlan0 (lower autoconnect-priority=5)
- wlan0 stays managed=yes (fallback) instead of being hard-disabled
- Status JSON now includes 'interface' field for diagnostics

Co-authored-by: Copilot <[email protected]>
This commit is contained in:
Mathieu Moran
2026-08-10 02:35:06 -04:00
co-authored by Copilot
parent e533f52e78
commit 908e86d169
2 changed files with 54 additions and 4 deletions
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deploy/install_netwatch.sh
+22 -3
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@@ -13,6 +13,7 @@ set -euo pipefail
REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
WLAN=wlan1 # T3U dongle — change to wlan0 if reverting to onboard
WLAN_FB=wlan0 # onboard fallback
sudo systemctl stop yaris-uplink-wait.service 2>/dev/null || true
sudo systemctl stop yaris-netwatch.timer yaris-netwatch.service 2>/dev/null || true
@@ -39,9 +40,27 @@ if nmcli connection show phone-hotspot >/dev/null 2>&1; then
802-11-wireless.mtu 1400
fi
# Disable onboard wlan0 so it doesn't interfere
sudo nmcli device disconnect wlan0 2>/dev/null || true
sudo nmcli device set wlan0 managed no 2>/dev/null || true
# Create wlan0 fallback profiles (lower autoconnect-priority so wlan1 wins)
# home-wifi-fb: same SSID as home-wifi but on wlan0
HOME_SSID=$(nmcli -g 802-11-wireless.ssid connection show home-wifi 2>/dev/null || true)
HOME_PSK=$(sudo nmcli -g 802-11-wireless-security.psk connection show --show-secrets home-wifi 2>/dev/null || true)
if [ -n "$HOME_SSID" ] && [ -n "$HOME_PSK" ]; then
nmcli connection delete home-wifi-fb 2>/dev/null || true
sudo nmcli connection add \
type wifi \
con-name home-wifi-fb \
ifname "$WLAN_FB" \
ssid "$HOME_SSID" \
-- \
wifi-security.key-mgmt wpa-psk \
wifi-security.psk "$HOME_PSK" \
connection.autoconnect yes \
connection.autoconnect-priority 5
echo "Created home-wifi-fb fallback on $WLAN_FB"
fi
# Re-enable wlan0 as a managed (but low-priority) fallback
sudo nmcli device set "$WLAN_FB" managed yes 2>/dev/null || true
sudo cp "$REPO_DIR/deploy/yaris-netwatch.service" /etc/systemd/system/yaris-netwatch.service
sudo cp "$REPO_DIR/deploy/yaris-netwatch.timer" /etc/systemd/system/yaris-netwatch.timer