Argon 100
SIM insertion and debugging connectivity issues
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Registered in England No. 4004881
VAT Registration No. GB614 5653 45
Argon 100 Debugging
There are 3 holes beside the SIM card holder behind which are LEDs that will be visible if turned on. There are 3 LEDS: Blue,
red and green as shown in Figure 5.
Figure 5: LED positions
When power is first applied to the Argon 100, all three LEDs will briefly illuminate. The red LED can be used for network
connection debugging purposes, and the green LED can be used to determine that the main Argon application firmware is
working correctly.
Red LED
There are 4 states indicated by the red LED:
Ringing or call in progress
Searching for network/not registered/turning off
Blinking once every 3 seconds
If the LED is blinking once/second, there are a number of fault possibilities that need to be checked:
1. Try SIM in a mobile phone at the site. Does it register on a network? Is it possible to send a text message (i.e. is
there credit on the SIM)?
2. Is the antenna connected properly?
3. Is the SIM card seated properly?
4. Does the SIM card have a pin number active on it (if so, the pin number needs to be disabled before insertion into
the Argon 100).
5. Does the network provider support the 2G network used by the Argon 100? The Argon 100 supports quad band
GSM but not UMTS (3G) or CDMA. In the UK, this means that the 3 network will not work as they only support
UMTS. A good guide to network operator support can be found at
http://en.wikipedia.org/wiki/Mobile_country_code. Any operator supporting GSM850, GSM900, GSM1800 or
GSM1900 will work with the Argon 100.
Once the LED starts blinking once every 3 seconds, the Argon 100 has been successfully attached to a mobile network and
is now ready for operation. A more robust method of proving that the Argon 100 is attached to the network is to make a
voice call (from another GSM or a land line) to the voice number of the SIM card. Although the Argon 100 will not answer,
the red LED will light continuously indicating that the call is ringing on the Argon 100.
