Hello!
I am working with an Arduino UNO and a SIM800A GSM Module. I am able to receive an SMS from the module, but it is a blank text message as shown in the attached image. What might be the issue?
This is the code that I am using:
#include <SoftwareSerial.h>
//SIM800 TX is connected to Arduino D8
#define SIM800_TX_PIN 8
//SIM800 RX is connected to Arduino D7
#define SIM800_RX_PIN 7
//Create software serial object to communicate with SIM800
SoftwareSerial serialSIM800(SIM800_TX_PIN,SIM800_RX_PIN);
void setup() {
//Begin serial comunication with Arduino and Arduino IDE (Serial Monitor)
Serial.begin(9600);
while(!Serial);
//Being serial communication witj Arduino and SIM800
serialSIM800.begin(9600);
delay(1000);
Serial.println("Setup Complete");
Serial.println("Sending SMS");
//Set SMS format to ASCII
serialSIM800.write("AT+CMGF=1\r\n");
delay(1000);
//Send new SMS command and message number
serialSIM800.write("AT+CMGS=\"977937XXXX\"\r\n");
delay(4000);
//Send SMS content
serialSIM800.write("TEST");
delay(1000);
//Send Ctrl+Z / ESC to denote SMS message is complete
serialSIM800.write((char)26);
delay(1000);
Serial.println("SMS Sent");
}
void loop() {
}
