ublox-config: Exit script only when modem reset is complete

recipes-connectivity/ublox-configuration/files/ublox-config.py

@@ -3,6 +3,7 @@
 import serial
 import sys
 import time
+import os
 
 MAX_TRY = 5
 tries = 0
@@ -37,3 +38,12 @@ execute_and_check(b'AT+UUSBCONF=2,"ECM",0')
 print("Resetting modem")
 ser.write(b'AT+CFUN=16\r')
 
+ser.close()
+
+# Wait until modem rebooted
+while True:
+    dirs = os.listdir("/dev")
+    for file in dirs:
+        if file == 'ttyACM2':
+            sys.exit(0);
+    time.sleep(1)