SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.

Member #6139

Member Since: July 12, 2006

Country: United States

  • I have a basic question about how the GSM/GPRS providers charge for data usage. If I do the SDATACONF,SDATASTART and SDATASEND of data do I get charged only for the data sent in the SDATASEND or do I get charged for all the the data going back and forth that is used to build the TCP/IP connection as well as the 1460 character buffer in a tcp/ip packet? I want to build an arduino based GPS GPRS tracker and it would be quite expensive if each time I reported location data I got charged for several thousand bytes instead of maybe 20 bytes

  • 1-What the flashing light for?? Sometimes it was solid and sometimes flashing..Didn’t seem to correlate to a fix 2- The SuperCap was quite hard to solder in. Didn’t know if the negative solder should touch the rim of the supercap or just the foot 3-for $50 you would think it could have been attached to a shield or some kind of anchor 4-bought a similar looking magnetic antenna at cutedigi..seems to work but no feet like the SF one

No public wish lists :(