#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX
void setup() {
Serial.begin(9600); // low enough
while (!Serial) {;}
Serial.println("hello!");
mySerial.begin(4800);
pinMode(2,INPUT_PULLUP);
while (digitalRead(2) == HIGH) {;}
mySerial.write("AT+CMGF=1"); mySerial.println()...