We are manufacturers of PLCs, HMIs, Remote I/Os and RTUs in India.
We are planning to develop a solution for Remote monitoring and control via GSM GPRS network. We intend to develop GSM GPRS module with IOs using telit GPRS core. We see huge opportunities in the field of water treatment and distribution in India.
Looking at Telit company profile and product range, we have selected Telit for our ambitious product development plan.
We have 2 GPRS modems GC864-Dual and 1 GPRS modem GT863-PY from Arrow Electronics India Pvt. Ltd., Bangalore, India. We are facing following problems.
Modem doesnot register with voice and GPRS with factory default profile.
– Responds +CREG:0,3 to command +CREG
– Responds +CGREG:0,3 to command +CGREG
– Responds +COPS:0,0,AIRTEL to command +COPS even though service provider is IDEA (not AIRTEL)
Modem registers with voice but not with GPRS with factory default profile with service provider IDEA.
– Responds +CREG:0,1 to command +CREG
– Responds +CGREG:0,2 to command +CGREG
But same modem registers with voice and GPRS with another service provider AIRTEL.
GPRS modem GT863-PY has no issues and is registering with voice and GPRS with both service providers and absolutely working fine. Hence, we have completed our development with GPRS modem GT863-PY.
What could be the problem with GPRS modems GC864-Dual. This problem is not resolved for last 2 months from your local representative despite of frequent follow up. We are worried about support from your local representative. We plan to standardize on GC864-Dual.We are really stuck up. Please help.
Modem 1: what if you perform manual operator selection to IDEA?
Modem 2: are you sure IDEA SIM has GPRS enabled?
Please repeat tests with AT#REGMODE=1, and report firmware version. Also a listing of AT#CSURV command result would help I think.
CGREG:0,0 is on both modems after #REGMODE=1 ?
Please post result of AT+CPIN? too.
Get firmware version with AT+CGMR?
Save the AT#CSURV in a text file or pdf, which you can attach here.
I sent you the link to get 10.00.073 firmware, please upgrade the modules and repeat the tests, plus:
– set AT+CMEE=2
– check why +CPIN is ERROR (what error) is on modem 1
– please save the terminal log file in a correct way, the file you attached is pretty much mangled. Attach again.
– check your antennas, from what I can understand in the above file the signal is very weak for suitable cells
GC864-DUAL-V2.zip contains readme.txt , streamGC864_DUAL_V2_10_00_073.bin.
readme .txt says XFP tool is required to upgrade frimware.
How can I get this tool, please.
How do I get new firmware, tools and documentation files from Telit?
We downloaded new firmware to modem
There is no improvement in observations.
Please find t survey files attached in pdf format after new firmware is downloaded.
-863PY Survey.pdf is the survey of modem in which both SIM cards are working fine.
– 864Faulty Survey.pdf is the survey of modem1 in which both SIM cards (IDEA and AIRTEL) donot register to voice and GPRS
– 864 Survey.pdf is the survey of modem2 in which IDEA SIM card registers with voice but not with GPRS. But it registers with AIRTEL SIM card.
Also note that with modem2, command #CSURV returns ERROR if SIM card is inside modem. This command gets response only if there is no SIM card inserted in modem.
Modem1 sends response CME ERROR 10 to command +CPIN.
Additionally, I have observed that in Telit Modems, error reporting related to socket and GPRS network may not be sufficient as pdf attached herewith. This helps in pin pointing exact problem. Can we get more details if available with you for error reporting.
Administrator note: please do not attach files files without relevance.
Can I get more information in case of socket error and GPRS network error please that will help in fault finding and diagnosis and make life easy.
OK, please keep us updated here, thanks.
Hit enter to search or ESC to close
Knowledge Base & Download Zone