--- /dev/null
+opengt
+ set com 115200n81
+ set comecho off
+ set senddelay 0.02
+ waitquiet 0.2 0.2
+ flash 0.1
+
+:start
+ send "AT+CUSD=1,"
+ send $env("ussd")
+ send ",15"
+ send "^m"
+ waitfor 120 "+CUSD:"
+ if % = -1 goto timeout
+ get 1 "^m" $s
+ print $s
+ exit 0
+
+:timeout
+ print "ERROR: no USSD response, timeout.\n"
+ exit 1