Fibocom MG661-EU - Status Indication

3 Application Interfaces
44
It is recommended to ground ADC signal lines to improve ADC voltage measurement
accuracy.
3.3.7 Status Indication
Background
Table 27. Status indication pin
Pin No.
Pin Name
I/O
Power
Domain
Description
16
NET_STATUS
DO
1.8V
Network status indication
25
STATUS
DO
1.8V
Operating status indication
The PIN16 of the MG661 module is the network status indication signal interface. It is used
to drive the status indicator. The following table describes the working status of the module
network indicator.
Table 28. Working status of the network status indicator
Mode
Level Status of Network Indicator Pin (PIN16
NET_STATUS)
Description
1
Slow flash (200 ms high/1800 ms low)
No SIM card
SIM pin
Registering with the
network (T < 15s)
Failed to register with the
network
2
Slow flash (1800 ms high/200 ms low)
Standby
3
Quick flash (120 ms high/120 ms low)
Establishing a data
connection