HC-12 problem with reading momentarily strings

I'm new here, so I hope my question is not naive. I'm using Arduino mega connected with a pulse sensor and a GPS (and other things that are not related to our problem), pulse sensor and GPS data are sent momentarily through HC-12 433 Mhz module to a receiver arduino uno that is only receiving data through HC-12 as well

for processing reasons, I send GPS data with a "G" prefix .. e.g "G11.00,7.45". and pulse data consist of those three: "S100" "Q97" "B22" // 100,97,22 are just examples, and each one is sent alone

for some reason, the receiver Arduino uno, is reading the data in it's ASCII decimal form and also separate it in a new line.

I can not use Serial.readString(), because it only print data after terminating the Serial communication and I need it momentarily, I tried to configure Serial.setTimeout() , but I couldn't manage to find a suitable time for all data.

please check my code and help me solve my problem, thank you

#include <Adafruit_GPS.h> // what's the name of the hardware serial port? #define GPSSerial Serial1 // Connect to the GPS on the hardware port Adafruit_GPS GPS(&GPSSerial); String gpsData=""; String pulseData=""; #include <SoftwareSerial.h> SoftwareSerial mySerial(12, 13); // RX, TX HC-12 uint32_t timer = millis(); void setup(){ // I think there is no problem here Serial.begin(115200); // we agree to talk fast! mySerial.begin(115200); interruptSetup(); // initialize timers to read pulse sensor and GPS at fixed intervals GPS.begin(9600); delay(100); GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_RMCGGA); delay(100); GPS.sendCommand(PMTK_SET_NMEA_UPDATE_100_MILLIHERTZ); GPS.sendCommand(PGCMD_ANTENNA); delay(1000); GPSSerial.println(PMTK_Q_RELEASE); } void loop(){ // that show me if there is a new data, you can skip it if (GPS.newNMEAreceived()) { // a tricky thing here is if we print the NMEA sentence, or data // we end up not listening and catching other sentences! // so be very wary if using OUTPUT_ALLDATA and trying to print out data GPS.lastNMEA(); // this also sets the newNMEAreceived() flag to false if (!GPS.parse(GPS.lastNMEA())) // this also sets the newNMEAreceived() flag to false return; // we can fail to parse a sentence in which case we should just wait for another } // if (millis() - timer > 10000) { // send GPS data every 10 seconds timer = millis(); // reset the timer if (GPS.fix) { gpsData.concat('G'); x=GPS.latitude/100; gpsData.concat(x); // I also tried String(x) gpsData.concat(','); y=GPS.longitude/100; gpsData.concat(y); // I also tried String(y) mySerial.println(gpsData); // here I send GPS data through HC-12 to the receiver Arduino uno gpsData=""; // reset } } sendDataToProcessing('S', Signal); // send Processing the raw Pulse Sensor data if (QS == true){ // Quantified Self flag is true when arduino finds a heartbeat sendDataToProcessing('B',BPM); // send heart rate with a 'B' prefix sendDataToProcessing('Q',IBI); // send time between beats with a 'Q' prefix QS = false; // reset the Quantified Self flag for next time } delay(50); } void sendDataToProcessing(char symbol, int data ){ // here I send pulse data through HC-12 to the receiver Arduino uno, and then process it using processing in the receiver arduino pulseData.concat(symbol); pulseData.concat(data); Serial.println(pulseData); // just for debugging and it was okay mySerial.println(pulseData); pulseData=""; //reset } interruptSetup() { // no need to read it, it is just some timer 1 and timer 2 initialization and their ISR, timer 1 read pulse sensor every 2 milliseconds (yeah fast but I guess mega could handle it),and do some calculations to find S, Q, and B. and timer 2 read GPS coming sentences. } 

the receiver code

void setup() { // put your setup code here, to run once: Serial.begin(115200); //I will connect HC-12 directly to pin 0,1 } void loop() { // put your main code here, to run repeatedly: while(Serial.available() >1){ String input = String (Serial.read());//read string , I need to cast it into String because data comes in ASCII // I also tried int input = Serial.read() ; //same thing happened Serial.println(input); } } 

waiting for your response.

###edit### to conclude the problem is that I want to receive data in the uno as it has been sent from the mega

e.g: I receive sI guess the ascii of the letter and the number also changes to some number

send | recive S490 | 52 53 Q252 | 10 83 B160 | 48 13 

I used Serial.write(Serial.read()) instead of Serial.println, and it worked, does someone know why?