Add 'check-reboot-modem.sh'

check-reboot-modem.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# A script to check the modem is still there and reboot it if not.
+# From: https://www.reddit.com/r/PinePhoneOfficial/comments/pldi68/after_1_week_with_pinephone_battery_life_and_sim/hcajlhn?utm_source=share&utm_medium=web2x&context=3
+
+DELAY=60
+
+st=$(lsusb | grep Quectel)
+if test "x$st" = "x"
+then
+    echo "Modem not found, rechecking in $DELAY s."
+    sleep $DELAY
+    st=$(lsusb | grep Quectel)
+    if test "x$st" = "x"
+    then
+        echo "Modem not auto-restored by system; restarting eg25-manager."
+        systemctl restart eg25-manager
+    else
+        echo "Modem was auto-restored by system."
+    fi
+fi