From 2fa7dd2eb1a2121d411f9a5d5a31a647af16df74 Mon Sep 17 00:00:00 2001
From: Xavier Del Campo Romero <xavi.dcr@tutanota.com>
Date: Mon, 13 Mar 2023 02:55:20 +0100
Subject: [PATCH] Add modem-restart

---
 modem-restart         | 38 ++++++++++++++++++++++++++++++++++++++
 modem-restart.service | 11 +++++++++++
 2 files changed, 49 insertions(+)
 create mode 100755 modem-restart
 create mode 100644 modem-restart.service

diff --git a/modem-restart b/modem-restart
new file mode 100755
index 0000000..422ca54
--- /dev/null
+++ b/modem-restart
@@ -0,0 +1,38 @@
+#! /bin/sh
+
+is_modem_available()
+{
+	if [ -z "$(lsusb | grep "2c7c:0125")" ]; then
+		return 1
+	fi
+
+	return 0
+}
+
+is_data_available()
+{
+	if ! nmcli c show --active | grep -e internet -e gsm > /dev/null; then
+		return 1
+	fi
+
+	return 0
+}
+
+TRY=0
+while :; do
+	if ! is_modem_available ; then
+		TRY=$((TRY + 1))
+		echo $(date) Restarting modem, $TRY try
+		systemctl restart eg25-manager
+		systemd-inhibit --what=sleep --why="Modem reset" sleep 60
+	elif [ $TRY -ne 0 ]; then
+		echo $(date): Modem restarted successfully
+		TRY=0
+	elif ! is_data_available; then
+		echo $(date): Restarting mobile data
+		systemd-inhibit --what=sleep --why="Restart mobile data" sleep 5
+		nmcli c up internet
+	fi
+
+	sleep 5
+done
diff --git a/modem-restart.service b/modem-restart.service
new file mode 100644
index 0000000..eb44442
--- /dev/null
+++ b/modem-restart.service
@@ -0,0 +1,11 @@
+[Unit]
+Description=Restarts eg25-manager if USB connection to the Quectel EG25 modem is lost
+
+[Service]
+User=root
+WorkingDirectory=/
+ExecStart=modem-restart
+Restart=always
+
+[Install]
+WantedBy=multi-user.target