将arduino中的firebase数据打印到7段显示器

Question

I am trying to get my firebase data and display it to my 7-segment using Arduino and I am getting the help of a python script to send data to the serial monitor. While it detects the Serial.available() inside the loop but I don't know how could I get that particular value and display its first digit to my 7-segment

Currently for the test I am just trying to display 1 if there is data matches inside serial monitor and arduino

Adruino:

#define A PA0
#define B PA1
#define C PA2
#define D PA3
#define E PA4
#define F PA5
#define G PA6
int a = 2;

void setup() {
  Serial.begin(9600);

  pinMode(A, OUTPUT);
  pinMode(B, OUTPUT);
  pinMode(C, OUTPUT);
  pinMode(D, OUTPUT);
  pinMode(E, OUTPUT);
  pinMode(F, OUTPUT);
  pinMode(G, OUTPUT);
}

void loop() {
  if(Serial.available()){
     //  Serial.println("0 1 2 3 4 5 6 7 8 9");
//  sevenSeg(1, 1, 1, 1, 1, 1, 0); //   0
//  delay(500);

  if(Serial.readString() == Serial.readString()){
    sevenSeg(0, 0, 0, 1, 1, 0, 0); //  1
    delay(500);
  }

  }else{
  sevenSeg(1, 1, 1, 1, 1, 1, 0);
  }//   0 



}


void sevenSeg (int g, int f, int e, int d, int c, int b, int a)
{
  digitalWrite(A, a);
  digitalWrite(B, b);
  digitalWrite(C, c);
  digitalWrite(D, d);
  digitalWrite(E, e);
  digitalWrite(F, f);
  digitalWrite(G, g);

}

Python Script:

import pyrebase
import argparse
import datetime
import time
import math
import serial
from serial import Serial

time_str = datetime.datetime.now().strftime("%Y%b%d_%I:%M:%S%p").upper()

ap = argparse.ArgumentParser()
ap.add_argument("-t", "--temp", help="Patient temperature at time of reading") #
ap.add_argument("-r", "--heart", help="Patient heart rate at the time of reading")
args = vars(ap.parse_args())


#firebase configuration
firebaseConfig = {
    "apiKey": "",
    "authDomain": "heartrate-firebase.firebaseapp.com",
    "databaseURL": "https://heartrate-firebase-default-rtdb.firebaseio.com/",
    "projectId": "heartrate-firebase",
    "storageBucket": "heartrate-firebase.appspot.com",
    "messagingSenderId": "851991577466",
    "appId": "1:851991577466:web:daaf323d9af64fd3318cc3",
}


firebase = pyrebase.initialize_app(firebaseConfig)
db = firebase.database()

if args.get("temp", None) is not None:
    data = {"Temperature": args.get("temp", None)}
    db.child("Temperature").child(time_str).set(data)

if args.get("heart", None) is not None:
    data = {"HeartRate": args.get("heart", None)}
    db.child("HeartRate").child(time_str).set(data)

user = db.child("HeartRate").get()

for x in user.each():
    date = db.child("HeartRate").child(x.key()).child("HeartRate").get()
    print("Heart Rate: " + date.val())


userTemp = db.child("Temperature").get()
for x in userTemp.each():
    date = db.child("Temperature").child(x.key()).child("Temperature").get()
    # date = db.child("Temperature").get()
    print("Temperature: " + date.val())
    

with serial.Serial('COM4', 9600, timeout=5) as ser:
    time.sleep(2)
    ser.write((date.val() + '\n').encode())
    time.sleep(1)
    y = ser.read(ser.inWaiting())
    print(y)
    # ser.close()

All I end up with is displaying 0. Any help or ideas are greatly appreciated. Thanks.

Answer 1

the problem was I was receiving 2\r\n from the database so to remove \r\n I used strip() to remove \r\n and it worked.