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 .
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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.
Hi , Here is some info about A7670C that you need to know first.
When you turn it on if the LED is not blinking that means the module is powered on and isn't registered on the network.
If the LED starts to blink that means the sim has registered on the network. As the blinking time is 800 ms in the datasheet after it connects to the network.
You don't need to setup APN or anything as the module detects by itself.
You don't need to use GPRS as well as it is a 4G LTE module.
However when interfacing with Arduino you would need a Bidirectional Level Shifter. Because the TTL of Arduino GPIO is 5V and that of the module is 1.8V
The default baud rate is 115200.
After that you can use AT commands to send SMS or call
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