Sim800l

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

Download and Install.

Go to 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 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.

For the reset pin they need NPN transistor, this is an example circuit that you can use.