Hello, I am new to using Arduino and have a project I'm looking to build. I'm looking to build a fire alarm system which will send a text message to my phone upon detection of a fire. I have the fire sensor and buzzer working correctly however I am having great difficulty with trying to set up the Arduino Uno GPRS Shield (SIM900).
For some reason, it is not picking up the network. I am using a PAYG EE sim card which has already been activated and works correctly from my mobile phone.
Any advice would be much appreciated.
Thank you.
Welcome to the forum
Please post your best effort at a sketch that does what you want
For testing of the GSM module to ensure it was working correctly, I used the diagram attached and code from another website.
I read elsewhere that the Status LED will light up and the NetLight LED will blink every 800 ms until it finds the network. When it finds the network, the NetLight LED will start blinking every three seconds.
On my GSM module, this is not happening with the network light. It keeps blinking with the power key pressed and upon release, the network light and status light both go dark.
have you a good quality antenna connected to the SIM900?
can you send AT commands to the SIM900 and get a response, e.g. AT+CSQ to check signal quality?
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