User manual

Confidential, the whole present document is the sole property of Maestro Wireless Solution Ltd.
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23 QUESTIONS AND ANSWERS
23.1 Installation
Q. If I changed my Maestro 100 2G with the MSP installed, can it be changed back to have TCP/IP feature?
A. It depends. Contact Distributor or Maestro Wireless Solutions.
Q. I have downloaded the dwl file, and entered AT+WOPEN=1, but I still cannot use MSP, why?
A. It could be installation problem. You can issue command AT+WOPEN=0, then AT+WOPEN=4, then repeat the
download procedure. If this still not help you may need to re-flash the main firmware first.
Q. Can I disable the MSP ?
A. Yes, you can enter AT+WOPEN=0 to disable.
Q. I get “Invalid modem” message after downloading dwl file and issuing AT+WOPEN=1. Why?
A. Maybe you have downloaded file into incorrect or damaged modem. Please contact Maestro Wireless Solutions.
Q. I had download incorrect dwl file, and the modem is not responding after issuing AT+WOPEN=1. What should I do?
A. You may need to re-flash the main firmware. Please contact Maestro Wireless Solutions or your distributor.
23.2 AutoTCP/UDP
Q. Can I specify <server> by URL (e.g. xxxx.com) rather than IP address?
A. Yes, but only if your GPRS network have proper DNS service. You cannot specify your own DNS server
Q. If I enabled AutoTCP or AutoUDP, how can I stop it ?
A. you need to enter the command AT+AUTOTCP=0 or AUTOUDP=0 by either 1: within 20 seconds after power up, or
2: during reconnection (serial port back to command mode), or 3: by SMS (see Chapter 11).
23.3 AT command driven TCP/UDP connection
Q. After the TCP/UDP connection is stopped I wan to enter AT+OTCP or AT+OUDP to reconnect but I get message
“+CME ERROR: 3”. Why ?
A. After TCP/UDP socket connection the GPRS connection session will also be disconnected. So please enter
AT+IPCONNECT=1,1 to reconnect GPRS first.
23.4 Remote AT command by SMS
Q. Can I send any AT command by SMS to control other features described in this document?
A. Yes. Please refer to Chapter 11.
23.5 I/O triggered AT command
Q. Can I put any AT command to control other features described in this document?
A. No. MSP AT commands described in this document can be executed by this feature.