13
10 seconds spends between every signal flashing sequence. One flashing takes a very short (ca.
50 msec), then half second breaking continues.
The understanding of the
GSM
LED
flashing numbers are listed here below:
RSSI value
(AT+CSQ)
GSM receiving signal
strength
LED flashing
(GSM)
99
unknown, faulty value
0
–
Bad
0..7
-113 dBm.. -99 dBm
1
–
Weak
8…11
-
97…
-91 dBm
2
–
Average
12..15
-89
…
-83 dBm
3
–
Average
16…19
-
81…
-75 dBm
4
–
Good
20…23
-
73…
-67 dBm
5
–
Good
24…27
-
65…
-59 dBm
6
–
Perfect
28…31
-
57…
-51 dBm
7
–
Perfect
STA: Status LED -
yellow
The
STA LED
assures information about the current operation. It twill be active only if the GPRS
signal transmission permitted. In this case from the beginning of the signal transmission the LED
starts to flashing.
It has 3 operation modes:
•
lighting continuously: the last GPRS signaling was succesful
•
with 3 second of breaks * number of flashing (the light interval period is half a seconds),
failure code (see later)
•
Turned off: GSM operation mode, no error
Failure codes
–
for signing the device opreation troubles
–
in case of a failure, read the
Chapter nr. 9!
•
0 flashing
–
in case of using the GSM operation mode
•
1 flashing
- Module failure
The serial connection is not operating properly between the module and the
Easy2S
®
board. After 1 minute, the device automatically tries to restart the module.
