I am having trouble in calling and sending sms using GSM A7670C with arduino uno. Can anyone send me the wiring diagram and the code for this GSM module for calling and sending sms . Please help me .
Your topic has been moved. Please do not post in "Uncategorized"; see the sticky topics in Uncategorized - Arduino Forum.
Maybe you should post what you have (wiring and code); also provide a link to the GSM that you use. That way those in the know might be able to point out what is wrong.