This Library is made for easy interfacing of GSM SIM800l module with various board in Arduino IDE.
Download, then rename the uncompressed folder to SIM800L.
Go to arduino IDE Sketch >> Import Library >> add library... Select the folder SIM800L
OR
Place the SIM800L library folder into your \Documents\Arduino\libraries folder. You may need to create the libraries subfolder if its your first library. Restart the IDE.
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| Arduino UNO | SIM800L | Notes |
|---|---|---|
| (3.8v)~(4.4v)! | Vcc | Power supply input, Use circuit diagram shown below |
| 10 RX_PIN | TX | If you are using SoftwareSerial |
| 11 TX_PIN | RX | If you are using SoftwareSerial |
| RESET_PIN | RST | You have to define reset pin and then pass argument during calling of begin, Also make reset circuit as shown in image below |
| GND | GND |
| Name | Return | Notes |
|---|---|---|
| begin(SerialPort) | true or false | Initialize the library, Insert SIM card compulsorily |
| begin(SerialPort,Rst_pin) | true or false | Initialize the library, Insert SIM card compulsorily. If you define and pass reset pin of your board you can reset GSM by external reset pin of the SIM800l |
| dialNumber(number) | true or false | It returns true if ATD passed successfully |
| answerCall() | true or false | |
| hangoffCall() | true or false | |
| callStatus() | int8_t | Return the call status. -1=Ideal, 0=Call in progress, 2=Dialing, 3=Ringing |
| sendSMS(number,text) | true or false | parameters must be Strings |
| sendSMS(msgIndex) | String | |
| signalStrength() | int8_t | Return signal strength, if -1 no network |
| checkNetwork() | true or false | |
| serviceProvider() | String | Return the name of service provider |
| GSMTime(time) | true or false | Will fill up the array you passed. Where time[0]=year,time[1]=Month,time[2]=date,time[3]=hour,time[4]=minute,time[5]=seconds |
| enAutoTimeZone() | true or false | You have to enable Auto time zone before you read the time. |
| softReset() | true or false | Reset the module by AT commands |
| hardReset() | true or false | Reset the module by external reset pin. You must have to pass reset pin during begin |
| startGPRS() | true or false | Start internet of GSM |
| tcpConnect(hostname,port) | void | This will try to connect with given TCP server parameter |
| tcpStatus() | true or false | Return TCP connection status |
| tcpAvailable() | uint16_t | Return available data count in TCP buffer |
| tcpRead(buffer,length) | void | Fill the buffer which you passed upto given length |
| tcpSend(buffer) | void | Send the buffer to the TCP server |
You can regulate the voltage, use +5v which can give higher current.
For the Reset circuit you need to use NPN transistor, follow the below circuit.
- This library is modified from original (Sim800l)
- Copyright (c) 2020 Ankit Ghevariya (https://github.com/ayushmarsian)
- Licensed under GPL-3.0 (text)