Hi,
In wihich situation, char array can not be convert to String?
I get the SIM return message and compare a string by below code:
String gelenSimCevap = String(simCevap);
But becaue of unknown reason I can not compare the below condition?
if (gelenSimCevap.indexOf("1,0,0,0") != -1){
}
I am sure simCevap is "1,0,0,0". But when I convert it to
String gelenSimCevap = String(simCevap);
gelenSimCevap is equal to "", empty?!
What may it be the reason?
Regards,
Mucip:)
Maybe the problem is somewhere in the code you didn't post.
what is simCevap ?
Hi,
I use Adafruit FONA library and get the AT command result by below code:
char simCevap[100];
if (fona.sendCheckReplyText("AT+CLCC", simCevap)) {
Serial.print("Sim Cevap: ");
Serial.println(simCevap);
}
Normally return is:
Sim Cevap: 1,0,3,0,0,"+905321547374",145,""
And when I hang up the phone then result is:
Sim Cevap: 1,0,0,0,0,"+905321547374",145,""
I want the control if the other party hang up the phone? And send voice file to it.
if (gelenSimCevap.indexOf("1,0,0,0") != -1) {
fona.sendCheckReply(F("AT+DTAM=2"), ok_reply)
fona.sendCheckReply(F("AT+CREC=4,1,0,100"), ok_reply)
}
Regards,
Mucip:)
Hi,
Please check my next post.
Regards,
Mucip:)
char simCevap[100];
if (fona.sendCheckReplyText("AT+CLCC", simCevap)) {
Serial.print("Sim Cevap: ");
Serial.println(simCevap);
}
char Req[7]={0};
for (byte i = 0; i < 7; i++)Req[i] = simCevap[i];
if (strcmp(Req, "1,0,0,0") == 0) {
fona.sendCheckReply(F("AT+DTAM=2"), ok_reply)
fona.sendCheckReply(F("AT+CREC=4,1,0,100"), ok_reply)
}
Hi,
It shouldn't be const char Req[7]. Should it be?
Regards,
Mucip:)
Hi,
Same problem! It looks like it get some values from remaining buffer and put in Reg value!.
Arduino ram value usage is %87. İs this problem come from this?
Regards,
Mucip:)
On AVR's expecially, C++ Strings SUCK RAM and cycles for what? So talent-free Morons can concatenate with a + and have other More-Like-BASIC/PASCAL syntax while black-boxing text from the coder.
As far as text and text manipulation, plain old C is SUPERIOR to C++ String Objects.
If you dig, that's what you'll find.
ty. changed now.
Hi,
Req variable is just created. Normally in the begining it must be empty/NULL/"".
But after your for loop and println(Req)
Return value is:
Sim Metin Req: 1,0,2,0,0,547374;
Wher did it find ,547374; value, I did not understand?! 
Regards,
Mucip:)
const char Def1[]={"1,0,0,0"};
void setup() {
Serial.begin(115200);
char simCevap[100] = {
"0,0,0,0,0,0,0"
};
char Req[7] = {0};
for (byte i = 0; i < 7; i++)Req[i] = simCevap[i];
Serial.print("Sim Cevap: ");
Serial.println(simCevap);
Serial.print("Req: ");
Serial.println(Req);
if (strcmp(Req, Def1) == 0)Serial.println("yes\n");
else Serial.println("no\n");
simCevap[0] = '1';
for (byte i = 0; i < 7; i++)Req[i] = simCevap[i];
Serial.print("Sim Cevap: ");
Serial.println(simCevap);
Serial.print("Req: ");
Serial.println(Req);
if (strcmp(Req, Def1))Serial.println("no\n");
else Serial.println("yes\n");
}
void loop() {}
Hi,
I disapointed unfortunatelly?!
I could not convert char to String noway! 
Where this stupid string come from?!
I'm searching in my room if anyone make me hidden camera joke?!...
Really strange!
Regards,
Mucip:)i
Hi,
Maybe there is unwanted charecters in SimCevap which is return from SIM800.
How can I check if all the charecters in SimCevap are printable or correct?
I am sure it must be some unexpected chars in SimCevap?!
Regards,
Mucip:)
char simCevap[100];
fona.sendCheckReplyText("AT+CLCC", simCevap);
for (i = 0; i < 100; i++) {
Serial.print(i);
Serial.print('\t');
Serial.println(simCevap[i],DEC);
}
Hi,
Everything looks OK. Very strange?!
Well, why I can not convert this char to string than?!
Tekrar sayısı: 6
---> AT+CLCC
<--- +CLCC: 1,0,0,0,0,"+905321547374",145,""
Sim Cevap: 1,0,0,0,0,"+905321547374",145,""
1,0,0,0,0,"+905321547374",145,""
0 49
1 44
2 48
3 44
4 48
5 44
6 48
7 44
8 48
9 44
10 34
11 43
12 57
13 48
14 53
15 51
16 50
17 49
18 53
19 52
20 55
21 51
22 55
23 52
24 34
25 44
26 49
27 52
28 53
29 44
30 34
31 34
32 0
33 0
34 0
35 0
36 0
37 0
38 0
39 0
40 0
41 0
42 0
43 0
44 0
45 0
46 0
47 0
48 0
49 0
Sim Metin Cevap:
Sim Metin Req: 1,0,0,0,0,547374;
Def1: 1,0,0,0
Req Metin: 1,0,0,0,0,547374;
Def1 Metin:
Cevap bekleniyor!
Regards,
Mucip:)
char simCevap[50];
const char Line1[7] = {49, 44, 48, 44, 48, 44, 48};
if (fona.sendCheckReplyText("AT+CLCC", simCevap)) {
Serial.print("SimCevap:");
Serial.println(simCevap);
}
char Req[7] = {0};
for (byte i = 0; i < 7; i++)Req[i] = simCevap[i];
Serial.println(Req);
Serial.println(Line1);
if (strcmp(Req, Line1) == 0) {
Serial.println("OK");
}
Hi,
Yes, we can get the result with this code maybe. But we still don't know why we can not convert this char into String?!
This is the main question unfortunatelly and still alive...
Regards,
Mucip:)
yes we can.
Serial.begin(115200);
String LettersDef = "1234567890";
char Symbols[10] = {"1234567890"};
String Letters = Symbols;
Serial.println(Letters);
if ( LettersDef == Letters) Serial.println("OK");
else Serial.println("not OK");
Letters = Letters.substring(0, 10);
Serial.println(Letters);
Serial.println(LettersDef);
if ( LettersDef == Letters) Serial.println("OK");
check this one and compare
Serial.begin(115200);
String LettersDef = "1234567890";
delay(1000);
char Symbols[10] = {49,50,51,52,53,54,55,56,57,48};
String Letters = Symbols;
Serial.println(Letters);
if ( LettersDef == Letters) Serial.println("OK");
else Serial.println("not OK");
Hi,
But all these codes can not explain why we can not get success below code?
fona.sendCheckReplyText("AT+CLCC", simCevap) //In here, send AT Command to SIM and get result in simCevap
String gelenSimCevap = String(simCevap); //We want to convert simCevap (Char value) into gelenSimCevap (This is String)
String comparedString = "1,0,0,0" ; //This is what we need to check value
if(gelenSimCevap.indexOf(comparedString ) != -1){
makeAnotherJob();
}else{
//Still wait for hang up phone?
}
I can get the char no problem:
Serial.println(simCevap); //Result is 1,0,3,0,0,"+905321547374",145,""
but later,
String gelenSimCevap = String(simCevap);
Serial.println(gelenSimCevap ); //Result is nothing... :frowning:
Very strange?!
Regards,
Mucip:)