DFRobot TEL0097 Manual - Page 4
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This example tests the DFRobot_SIM808 GPS/GPRS/GSM Shield's call answering and SMS reading function.
1. Open the `SIM808_LoopHandle` example or copy the code to your project
2. Download and set the function switch to `Arduino`
3. The shield will autoanswer phone calls or send SMS Messages to the serial terminal
#include <DFRobot_sim808.h>
#define MESSAGE_LENGTH 20
char gprsBuffer[64];
char *s = NULL;
DFRobot_SIM808 sim808(&Serial);
void setup() {
//mySerial.begin(9600);
Serial.begin(9600);
//******** Initialize sim808 module *************
while(!sim808.init()) {
Serial.print("Sim808 init error\r\n");
delay(1000);
}
delay(3000);
Serial.println("Init Success, please call or send SMS message to me!");
}
void loop() {
//******** Wait serial data *************
if(sim808.readable()){
sim808_read_buffer(gprsBuffer,32,DEFAULT_TIMEOUT);
//Serial.print(gprsBuffer);
//************** Detect the current state of the telephone or SMS ************************
if(NULL != strstr(gprsBuffer,"RING")) {
sim808.answer();
}else if(NULL != (s = strstr(gprsBuffer,"+CMTI: \"SM\""))) { //SMS: $$+CMTI: "SM",24$$
char message[MESSAGE_LENGTH];
int messageIndex = atoi(s+12);
sim808.readSMS(messageIndex, message,MESSAGE_LENGTH);
Serial.print("Recv Message: ");
Serial.println(message);
}
sim808_clean_buffer(gprsBuffer,32);
}
}
Read SMS Messages
This example tests the DFRobot_SIM808 GPS/GPRS/GSM Shield's ability to read SMS messages.
1. Open the `SIM808_SMSread` example or copy the code to your project
2. Download and set the function switch to `Arduino`
3. The shield will receive SMS Messages and send them to the serial terminal