Converting a string to Array
Posted: Tue Jan 15, 2019 2:04 amIncorrect result on using toCharArray() or converting a string to array manually
Hi,
I'm using NodeMCU for a project and Arduino 1.8.8. I want to convert a string to char Array. The code and output are as follows.
code:
Result:
Screenshot attached herewith. (I've pressed the reset button once.)
Expected Result:
I'm pretty much unsure as of why the result is not as expected and also why these ghostly characters are showing up in the serial monitor.
Any help is highly appreciated...
Hi,
I'm using NodeMCU for a project and Arduino 1.8.8. I want to convert a string to char Array. The code and output are as follows.
code:
Code: Select all
char ssid[] = "";
char pass[] = "";
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
String answer = "ssid:Moto G (4) 6788aesrhtd5@#$; pass:error$34556jjhjv24";
extract(answer);
Serial.println(ssid);
Serial.println(pass);
}
void extract(String value) {
String t_ssid = "";
String t_pass = "";
int flag = 0;
int len = value.length();
for (int i = 0; i < len ; i++) {
if (value.charAt(i) == ';')
flag = i;
}
t_ssid = value.substring(5, flag);
t_pass = value.substring(flag + 7, len);
Serial.print(ssid);
Serial.println(".");
Serial.print(pass);
Serial.println(".");
Serial.println();
Serial.println(t_ssid);
Serial.println(t_pass);
for (int i = 0; i < t_ssid.length(); i++)
ssid[i] = t_ssid.charAt(i);
for (int j = 0; j < t_pass.length(); j++)
pass[j] = t_pass.charAt(j);
}
void loop() {
// put your main code here, to run repeatedly:
}
Result:
Screenshot attached herewith. (I've pressed the reset button once.)
Expected Result:
Code: Select all
.
.
Moto G (4) 6788aesrhtd5@#$
error$34556jjhjv24
Moto G (4) 6788aesrhtd5@#$
error$34556jjhjv24
I'm pretty much unsure as of why the result is not as expected and also why these ghostly characters are showing up in the serial monitor.
Any help is highly appreciated...