EFOY GSM-2-SMS Operating And Installation Manual page 5

Operation and Installation
Step 3: Connect to EFOY-PRO (serial cable)
Connect the serial interface of the GSM-2-SMS with the
"Data Interface" of the EFOY-PRO fuel cell, using the
serial interface cable.
Note:
If you want to use the fuel sensor FS1 for the EFOY-PRO
fuel cartridges please use the Y-adapter to connect both
the GSM-2-SMS and the FS-1 with the "Data Interface"
of the EFOY-PRO fuel cell.
Step 4: Connect power supply
Connect the GSM-2-SMS to a DC power source with
correct polarity using the power supply cable (Pin6 =
GND (-), Pin1 = +VCC). The GSM-2 power supply voltage
range is 8-30VDC.
The GSM-2-SMS is now ready for operation and
will automatically connect to the GSM network.
LED display:
The GSM-2-SMS has a yellow LED to indicate the
system status.
LED status
blinking 600ms on
600ms off
1x 75ms on
flashing 3s off
2x 75ms on
flashing 75ms off
75ms on
3s off
4
description
Not connected - SIM
card missing, PIN
missing, searching for
network
Connected with GSM
network
Active GPRS
connection