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Seeed-Studio / GPRS_Shield_Suli

GPRS Shield based on SIM900
http://www.seeedstudio.com/depot/GPRS-Shield-V20-p-1379.html?cPath=19_20
MIT License
48 stars 40 forks source link

SMS works fine, but can't open TCP/IP connection #4

Open goodwordalchemy opened 9 years ago

goodwordalchemy commented 9 years ago

I have a SIM from an att gophone hotspot. It's data only. I'm sure there is data available, but no voice and messaging. I've gotten the modem to work, but I can't get the tcp connection example to work. I've tried replacing the apn name "cmnet" with both "wap.cingular" and "isp.cingular," but I haven't had any luck. Can you recommend any next steps?

goodwordalchemy commented 9 years ago

Just upgraded my sim card to include voice and data, just to rule that out. Still no luck

goodwordalchemy commented 9 years ago

GPRS_sendSMS example code works fine though, but still no luck with the TCP/IP connection. Serial readout is:

"gprs join network error gprs join network error gprs join network error"

goodwordalchemy commented 9 years ago

new Development:

I re-downloaded all of my arduino libraries. I had not installed them properly. I am still not getting any connection with the default TCP connection in the example. This is my serial readout now:

"IP Address is 10.0.181.0 connect error waiting to fetch... fetch over... "

mandyala commented 8 years ago

any luck with the tcp/ip...getting the same error