i have a problem with my sim800l.
i know that sim800l need 3.7 v-4.3 v for the input voltage but rather than i use converter from my arduino, i use a divided voltage using resistor
i'm using 50 ohm and 220 ohm.
when i'm check my sim800l, it seems not responded
i'm using below program
any one help please
thank you very much
these is the program i use #include <SoftwareSerial.h>
SoftwareSerial SIM800L(2, 3); // RX | TX
// Connect the SIM800L TX to Arduino pin 2 RX.
// Connect the SIM800L 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 SIM800L is ready");
// start communication with the SIM800L in 9600
SIM800L.begin(9600);
Serial.println("SIM800L started at 9600");
delay(1000);
Serial.println("Setup Complete! SIM800L is Ready!");
}
void loop()
{
// Keep reading from SIM800 and send to Arduino Serial Monitor
if (SIM800L.available())
{ c = SIM800L.read();
Serial.write(c);}
// Keep reading from Arduino Serial Monitor and send to SIM800L
if (Serial.available())
{ c = Serial.read();
SIM800L.write(c);
}
}