我一直在尝试使用 SIM300 模块发送短信。虽然在尝试使用超级终端时模块工作正常，但我无法使用 PIC 发送 SMS。
下面是我尝试过的代码（LCD 也包括在内（Lcd 工作正常））：
编程：MikroC
控制器：PIC16f877A
模块：SIM300
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D7 at RB3_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D4 at RB0_bit;
// Pin direction
sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D7_Direction at TRISB3_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB0_bit;
void main(){
//CMCON = 7; //Disable Comparators
Lcd_Init(); // Initialize LCD
UART1_init(9600); //Initiate baud rate to 9600
Delay_ms(500); //Delay
UART1_Write_Text("AT+CMGF=1"); //Write "AT+CMGF=1"
UART1_Write(0x0D); // mean (ENTER)
Delay_ms(500); //Delay
UART1_Write_Text("AT+CMGS="); //Write "AT+CMGS="
UART1_Write(0x22); //Write (")
UART1_Write_Text("9449869619"); //Number SMS send to
UART1_Write(0x22); //Write (")
UART1_Write(0x0D); // mean (ENTER)
Delay_ms(500); //Delay
UART1_Write_Text("WELCOME");
UART1_Write(0x0D); //Words to be sent
UART1_Write(0x1A);
//Write "ctrl+z"
Delay_ms(500); //Delay
Lcd_Out(1,1,"MSG SENT SUCESSFULLY"); // Write text in first row
}