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Arduino / C++ simple array split join
/*
* Simple example of string join and split functions for arrays of uint8_t
* values of known length.
*
* Output:
------------------
array split / join
------------------
SENDING >> 52 225 210 170 219
RECEIVING << 52 225 210 170 219
----
SENDING >> 56 6 40 252 154
RECEIVING << 56 6 40 252 154
----
SENDING >> 139 77 7 114 117
RECEIVING << 139 77 7 114 117
----
*/
String join(uint8_t vals[], char sep, int items) {
String out = "";
for (int i=0; i<items; i++) {
out = out + String(vals[i]);
if ((i + 1) < items) {
out = out + sep;
}
}
return out;
}
void split(String value, char sep, uint8_t vals[], int items) {
int count = 0;
char *val = strtok((char *)value.c_str(), &sep);
while (val != NULL && count < items) {
vals[count++] = (uint8_t)atoi(val);
val = strtok(NULL, &sep);
}
}
uint8_t send_array[5];
uint8_t receive_array[5];
void setup() {
Serial.begin(115200);
while (! Serial);
Serial.println(F("------------------"));
Serial.println(F("array split / join"));
Serial.println(F("------------------"));
}
void loop() {
// put your main code here, to run repeatedly:
for (int i=0; i<5; i++) {
send_array[i] = random(255);
}
String s_rep = join(send_array, ' ', 5);
Serial.print("SENDING >> ");
Serial.println(s_rep);
split(s_rep, ' ', receive_array, 5);
Serial.print("RECEIVING << ");
for (int i=0; i<5; i++) {
Serial.print(receive_array[i]);
Serial.print(" ");
}
Serial.println();
Serial.println("----");
delay(5000);
}
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