Telit Communications S.p.A. HE910 Benutzerhandbuch
HE910 Hardware User Guide
1vv0300925 Rev.9
– 07-02-2012
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 61 of 80
12.4 Indication of network service availability
The STAT_LED pin status shows information on the network service availability and
Call status. The function is available as alternate function of GPIO_01
In the HE910 modules, the STAT_LED needs an external transistor to drive an external
LED.
Therefore, the status indicated in the following table is reversed with respect to the pin
status.
LED status
Device Status
Permanently off
Device off
Fast blinking
(Period 1s, Ton 0,5s)
(Period 1s, Ton 0,5s)
Net search / Not registered
/ turning off
/ turning off
Slow blinking
(Period 3s, Ton 0,3s)
(Period 3s, Ton 0,3s)
Registered full service
Permanently on
a call is active
A schematic example could be: