Hallo zusammen,
ich habe bisher viele kleinere Projekte mit Arduino gemacht. Das hier fordert mich aber heraus!
Mein Ziel ist es mit einer SMS ein Relais zu schalten.
GSM Modul hat einen SIM900 Chip/ Mit Vodafone SIM-Karte ohne PIN
Diesen Code hab ich aus dem Internet.
#include <SoftwareSerial.h>
SoftwareSerial GPRS(7, 8); // RX, TX
enum _parseState {
PS_DETECT_MSG_TYPE,
PS_IGNORING_COMMAND_ECHO,
PS_READ_CMTI_STORAGE_TYPE,
PS_READ_CMTI_ID,
PS_READ_CMGR_STATUS,
PS_READ_CMGR_NUMBER,
PS_READ_CMGR_SOMETHING,
PS_READ_CMGR_DATE,
PS_READ_CMGR_CONTENT
};
byte state = PS_DETECT_MSG_TYPE;
char buffer[80];
byte pos = 0;
int lastReceivedSMSId = 0;
boolean validSender = false;
void resetBuffer() {
memset(buffer, 0, sizeof(buffer));
pos = 0;
}
void setup()
{
GPRS.begin(9600);
Serial.begin(9600);
// Set as appropriate for your case
pinMode(2, OUTPUT);
pinMode(4, OUTPUT);
digitalWrite(2, HIGH);
digitalWrite(4, HIGH);
for (int i = 1; i <= 21; i++) {
GPRS.print("AT+CMGD=");
GPRS.println(i);
delay(200);
// Not really necessary but prevents the serial monitor from dropping any input
while(GPRS.available())
Serial.write(GPRS.read());
}
}
void loop()
{
while(GPRS.available()) {
parseATText(GPRS.read());
}
}
void parseATText(byte b) {
buffer[pos++] = b;
if ( pos >= sizeof(buffer) )
resetBuffer(); // just to be safe
/*
// Detailed debugging
Serial.println();
Serial.print("state = ");
Serial.println(state);
Serial.print("b = ");
Serial.println(b);
Serial.print("pos = ");
Serial.println(pos);
Serial.print("buffer = ");
Serial.println(buffer);*/
switch (state) {
case PS_DETECT_MSG_TYPE:
{
if ( b == '\n' )
resetBuffer();
else {
if ( pos == 3 && strcmp(buffer, "AT+") == 0 ) {
state = PS_IGNORING_COMMAND_ECHO;
}
else if ( pos == 6 ) {
//Serial.print("Checking message type: ");
//Serial.println(buffer);
if ( strcmp(buffer, "+CMTI:") == 0 ) {
Serial.println("Received CMTI");
state = PS_READ_CMTI_STORAGE_TYPE;
}
else if ( strcmp(buffer, "+CMGR:") == 0 ) {
Serial.println("Received CMGR");
state = PS_READ_CMGR_STATUS;
}
resetBuffer();
}
}
}
break;
case PS_IGNORING_COMMAND_ECHO:
{
if ( b == '\n' ) {
//Serial.print("Ignoring echo: ");
//Serial.println(buffer);
state = PS_DETECT_MSG_TYPE;
resetBuffer();
}
}
break;
case PS_READ_CMTI_STORAGE_TYPE:
{
if ( b == ',' ) {
Serial.print("SMS storage is ");
Serial.println(buffer);
state = PS_READ_CMTI_ID;
resetBuffer();
}
}
break;
case PS_READ_CMTI_ID:
{
if ( b == '\n' ) {
lastReceivedSMSId = atoi(buffer);
Serial.print("SMS id is ");
Serial.println(lastReceivedSMSId);
GPRS.print("AT+CMGR=");
GPRS.println(lastReceivedSMSId);
//delay(500); don't do this!
state = PS_DETECT_MSG_TYPE;
resetBuffer();
}
}
break;
case PS_READ_CMGR_STATUS:
{
if ( b == ',' ) {
Serial.print("CMGR status: ");
Serial.println(buffer);
state = PS_READ_CMGR_NUMBER;
resetBuffer();
}
}
break;
case PS_READ_CMGR_NUMBER:
{
if ( b == ',' ) {
Serial.print("CMGR number: ");
Serial.println(buffer);
// Uncomment these two lines to check the sender's cell number
// validSender = false;
// if ( strcmp(buffer, "\"+49XXXXXXXXXXX\",") == 0 )
validSender = true;
state = PS_READ_CMGR_SOMETHING;
resetBuffer();
}
}
break;
case PS_READ_CMGR_SOMETHING:
{
if ( b == ',' ) {
Serial.print("CMGR something: ");
Serial.println(buffer);
state = PS_READ_CMGR_DATE;
resetBuffer();
}
}
break;
case PS_READ_CMGR_DATE:
{
if ( b == '\n' ) {
Serial.print("CMGR date: ");
Serial.println(buffer);
state = PS_READ_CMGR_CONTENT;
resetBuffer();
}
}
break;
case PS_READ_CMGR_CONTENT:
{
if ( b == '\n' ) {
Serial.print("CMGR content: ");
Serial.print(buffer);
parseSMSContent();
GPRS.print("AT+CMGD=");
GPRS.println(lastReceivedSMSId);
//delay(500); don't do this!
state = PS_DETECT_MSG_TYPE;
resetBuffer();
}
}
break;
}
}
void parseSMSContent() {
char* ptr = buffer;
while ( strlen(ptr) >= 2 ) {
if ( ptr[0] == 'r' ) {
if ( ptr[1] == '1' )
digitalWrite(2, HIGH);
else
digitalWrite(2, LOW);
}
if ( ptr[0] == 'y' ) {
if ( ptr[1] == '1' )
digitalWrite(4, HIGH);
else
digitalWrite(4, LOW);
}
ptr += 2;
}
}
Mit "r" oder "y" soll jeweils mit "1" oder "0" ein- bzw. ausgeschaltet werden
Funktioniert auf jeden Fall nicht
Danach hab ich folgendes getestet:
#include <SoftwareSerial.h>
SoftwareSerial GPRS(7, 8); // RX, TX
void setup()
{
GPRS.begin(9600);
Serial.begin(9600);
}
void loop()
{
while(GPRS.available())
Serial.write(GPRS.read());
while (Serial.available())
GPRS.write(Serial.read());
}
Und wenn ich die SMS lesen will bekomme ich folgende Antwort.
AT
OK
+CMTI: "SM",2
AT+CMGR=2
+CMGR: 0,"",23
0791947122723033040C9194712350909800000240401132438004D4F29C0E
OK
⸮⸮⸮⸮⸮⸮⸮
Wieso bekomme ich keinen Text zurück sonder nur Zahlen? In der verschickten SMS steht "Test"
Ich habe mich bereits durch viele Supports gelesen und Google befragt, aber diesen Fehler habe ich noch nirgends gesehen.
