I have been trying to develop an Arduino controlled weather station that will upload readings via a cell modem.
Originally I bought an MG 2639 cellular shield from Sparkfun. I can read the information off of the SIM card in the shield, but I can't get it to respond to or send text messages. I contacted Sparkfun tech support, and they weren't much help since they have discontinued the product.
I looked on the Arduino shop, and the only cellular shield I can find there only works on a 2G network, which I do not have access to.
Does anyone have a recommendation for a cellular modem I can use for this project?