![]() We turn on the power then through the port monitor, setting the speed to 19200 and the "new line" option is required.Įnter the command "ATI" and press ENTER. println("SMS send finish" ) delay(3000) )Īdd the procedure to the end of the sketch and call it from the main loop like this: sms(String("SMS text in English."),String("+791212345678")) Examination Sketch#include SoftwareSerial mySerial(2, 3) // RX, TX void setup() ( Serial.begin(19200) // Port speed for Arduino communication with the computer Serial.println("Goodnight moon!") mySerial.begin(19200) //Speed of port for communication between Arduino and GSM module mySerial.println("AT" ) ) void loop() (if(mySerial.available()) Serial.write(mySerial.read()) if ( Serial.available()) mySerial.write( Serial.read()) ) Procedure for sending SMSvoid sms (String text, String phone ) ( Serial. If you need to connect several GSM modules to Arduino, then use other pins and register in the sketch via SoftwareSerial. TX and RX pins on the GSM module are connected to 2 and 3 digital pins on the Arduino. From the voltage converter, we connect the output contacts to the GSM module, observing the polarity. But you can pick up a diode or voltage regulator.īefore connecting to the voltage converter, it is necessary to set it up by setting the output voltage to any in the range of 3.7V - 4.2V. The question arises: is it possible to supply power from the Arduino itself from 5V? I wouldn't risk it directly. from 12V "plus" goes to the voltage converter to "incoming plus".from 12V "minus" goes to the arduino in "GND", from "GND" to the voltage converter to "incoming minus".We give power to the GSM module from a 12V battery through a converter: 12V battery (or any power source from 6V to 20V)Ĭonnect Arduino to computer via USB cable.Step-down voltage converter (DC-DC step-down converter).GSM module SIM800L (power supply from 3.7V to 4.2V).To connect, I used the following components: An inconvenient nuance is that this module requires a non-standard 3.7V power supply for Arduino, so it had to be powered separately through a step-down voltage converter. The article may also be useful for connecting the SIM900 module, NEOWAY M590, and some cell phones. There are GSM shields specifically for Arduino, but they are quite expensive for the price, so I decided to purchase a budget option. Consider how to connect Adruino with the SIM800L GSM module. ![]()
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