I've connected the arduino UNO to the sim900a. But after checking the serial communication between the two I keep getting these output.
Here is the connections and code that I used
#include <SoftwareSerial.h>
SoftwareSerial SIM900A(2, 3);
// Connect the SIM900A TX to Arduino pin 2 RX.
// Connect the SIM900A RX to Arduino pin 3 TX.
char c = ' ';
void setup()
{
// start th serial communication with the host computer
Serial.begin(9600);
while (!Serial);
Serial.println("Arduino with SIM900A is ready");
// start communication with the SIM900A in 9600
SIM900A.begin(9600);
Serial.println("SIM900A started at 9600");
delay(1000);
Serial.println("Setup Complete! SIM900A is Ready!");
}
void loop()
{
// Keep reading from SIM900 and send to Arduino Serial Monitor
if (SIM900A.available())
{ c = SIM900A.read();
Serial.write(c);
}
// Keep reading from Arduino Serial Monitor and send to SIM900A
if (Serial.available())
{ c = Serial.read();
SIM900A.write(c);
}
}
How can I fix this?
