Read full line without getline(), fgets or scanf()

Question

i have a short question for some standard problem.

How can I read a full line from a receive buffer without getline(), fgets or scanf().

Because its not availble in the arduino enviroment.

I get only one sign, after saving data into message. Here my code:

message = ((char)LoRa.read());

With the serial monitor it works fine to receiv and print the full line from the sender.

Thanks so much :)

enter image description here

Tried to find some libs for using getline(), fgets or scanf() in arduino ide. But it couldnt work

Answer 1

Could be something like this:

char incomingMessage[200];
String receivedLine;
uint16_t pointer = 0;
bool lineReceived = false;
  
void setup() {
    // put your setup code here, to run once:
    Serial.begin(115200);
    memset(incomingMessage, NULL, sizeof(incomingMessage));
    receivedLine.reserve(200);
}
  
void loop() {
    // put your main code here, to run repeatedly:
    if (Serial.available() > 0) {
        incomingMessage[pointer] = (char)Serial.read();
        pointer++;

        if (incomingMessage[pointer] == '\n') {
            lineReceived = true;
        }
    }

    if (lineReceived) {
        lineReceived = false;
        receivedLine = "";
        pointer = 0;
        receivedLine = incomingMessage;
        memset(incomingMessage, NULL, sizeof(incomingMessage));
    }
}