User Manual

Table Of Contents
SARA-R4 series-AT commands manual
UBX-17003787 - R16
16GPIO
Page 190 of 401
Time
Voltage
V
H
V
L
30 s
100
ms
Figure 4: GPIO pin progress for registered home network NB1 / NB2
16.1.3.5Registered roaming 2G
Cyclic Output / High for 100 ms, Output / Low for 100 ms, Output / High for 100 ms, Output / Low for 2 s
Time
Voltage
V
H
V
L
2 s
100
ms
Figure 5: GPIO pin progress for registered roaming 2G
16.1.3.6Registered roaming 3G
Cyclic Output / High for 50 ms, Output / Low for 50 ms, Output / High for 50 ms, Output / Low for 100 ms
Time
Voltage
V
H
V
L
50
ms
50
ms
Figure 6: GPIO pin progress for registered roaming 3G
16.1.3.7Registered roaming NB1 / NB2
Cyclic Output / High for 100 ms, Output / Low for 100 ms, Output / High for 100 ms, Output / Low for 30 s