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Author: vittorioexp

README.md

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+## Library SIM800l Module for Arduino UNO
+The Purpose of This library is to use the module in the most easy way and transparent.  
+Website: [Sim800l library](https://cristiansteib.github.io/Sim800l/)
+
+##To download and Install.
+Go to [Releases](https://github.com/cristiansteib/Sim800l/releases) click the " Source Code (zip) " button, then rename the uncompressed folder to **Sim800l**. 
+  Check that the *Sim800l* folder contains Sim800l.cpp and Sim800l.h
+
+Go to arduino IDE Sketch >> Import Library >> add library... Select the folder Sim800l
+
+OR 
+
+Place the Sim800l library folder your arduinosketchfolder/libraries/ folder. 
+You may need to create the libraries subfolder if its your first library. Restart the IDE.
+
+
+## connections & pinouts
+Arduino Uno  |   Sim800l   |    Notes  
+-------------|-------------|------------
++5v| (3.8v)~(4.4v)!| Power supply input
+10 RX_PIN | TX |  
+11 TX_PIN | RX |
+2   RESET_PIN | RST| Reset Pin
+GND | GND | 
+
+
+## Methods and functions
+
+Name|Return|Notes
+:-------|:-------:|:-----------------------------------------------:|
+begin()|None|Initialize the library
+begin(number)|None|Initialize the library
+reset()|None|Reset the module,and wait to Sms Ready.
+sendSms(number,text)|true or false|parameters must be Strings.
+readSms(index)|String|index is the position of the sms in the prefered memory storage
+getNumberSms(index)|String|returns the number of the sms.
+delAllSms()|true or false|Delete all sms
+answerCall()|true or false|
+callNumber(number)|None|
+hangoffCall()|true or false|
+getCallStatus()|uint8_t|Return the call status, 0=ready,2=Unknown(),3=Ringing,4=Call in progress
+setPhoneFunctionality()|None|Set at to full functionality 
+activateBearerProfile()|None|
+deactivateBearerProfile()|None|
+RTCtime(int *day,int *month, int *year,int *hour,int *minute, int *second)|None| Parameters must be reference ex: &day
+dateNet()|String|Return date time GSM
+updateRtc(utc)|true or false|Return if the rtc was update with date time GSM. 
+____________________________________________________________________________________
+
+You can regulate the voltage to the desired with this, is not the best,
+but for start it's easy.
+
+![alt text](https://github.com/cristiansteib/Sim800l/blob/master/images/power_supply.png "LM317")
+
+
+
+For the **reset pin** they need NPN transistor, this is an example circuit that you can use.
+
+![alt text](https://github.com/cristiansteib/Sim800l/blob/master/images/RESET.png "reset_circuit")