- The GRD does not respond to SMS messages.
- If “GRD Config” shows a very low signal level “Ex: -113dB” or SIM status shows “LOW SIGNAL”).
- The GRD has no signal. Verify:
- That the antenna is correctly connected.
- That the GRD is within the coverage area of your cell phone operator.
- The SIM card status indicates failure.
- The GRD is not accepting the SIM.
- If “GRD Config” shows “PIN Required”: the SIM card has the PIN activated (security code), configure the PIN.
- If “GRD Config” shows “Blocked card (PUK)”: the SIM card is blocked by PUK.
- If there is no indication of error.
- Verify that the SIM card placed in the GRD has credit.
- Verify that the SIM card has a subscription or account that allows to send SMS messages.
- Corroborate that the phone number you are sending the message to, coincides with the one on the SIM Card of the GRD.
- Be sure that the message sent is one of the supported ones by the GRD. If the message begins with a word the GRD cannot interpret, it will not answer. The same thing happens if the message begins with a space.
- The GPRS connection cannot be established
- Verify the status with “GRD Config” or send a SMS message requesting the connection status (‘state’ command)
- If the statusshows “ERROR”. Verify that the configured Operator (GPRS APN/user/password) corresponds to the one on the SIM Card. (You can verify this value sending the SMS message ‘list’).
- If the status shows “CONNECTING” for a long time, it simply means there are delays in the network. Wait until the GRD establishes the connection.
- The MW connection cannot be established.
- The status shows “WAITING FOR GPRS CONNECTION”, the GPRSservice is not available (or is not correctly configured). It won’t be able to establish a TCP connection until a GPRS connection is available..
- The status shows “DISABLED” (the Link LED is off): there is no configured connection or the GRD is waiting for the next try.
- The status shows “Connecting…” (The Link LED blinks rapidly).
- If the LED blinks rapidly during several seconds (a minute or more) verify:
- That the equipment to which you are trying to connect is not behind a firewall which is filtering the connection. Please read the "Windows Firewall" section
- You might not have configured the MW's public IP address and/or forgot to open the TCP port in you router. Please read the "Port forwarding" section
- That the quality of the GPRS service is acceptable. For example: attempt to access a page with a web browser of any cell phone having the service available and verify that it can be done without problems.
- If the LED blinks rapidly a few seconds (2 or 3) and then blinks slowly verify:
- That the IP address and port to which the GRD is attempting to connect are the correct ones.
- That there is no reason why the server is rejecting the connection request (ex. That is requesting identification or authentication).
- A connection is established and then it closes
- Verify that there is no reason why the server is rejecting the connection request (ex. That is requesting identification or authentication).
- The connection is established but the communication fails
- If the Link LED remains constantly on and it does not blink, is indicating that there is no data reception or transmission. If the Link LED blinks sporadically, it is indicating that data are being sent and/or received. In any case verify:
- That the established TCP connection was made to the correct IP and port (through SMS with the ‘state’ command).
For more information on troubleshooting problems please contact support@exemys.com
2015-08-06