Chuanshuoge: tinkercad temp sensor and UART

Wednesday, July 6, 2022

//master

char charVal[6];

void setup() {

// Begin the Serial at 9600 Baud

Serial.begin(9600);

}

void loop() {

float temperature = analogRead(A0);

temperature = temperature/1023*5;

temperature = temperature*100-50;

//this is a float we want it as a c-string:

//5 is min width, 1 is precision; float value is copied to charVal

dtostrf(temperature, 5, 1, charVal);

Serial.write(charVal); //Write the serial data

delay(1000);

}

---------------

//slave

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd1(0x20,16,2);

char mystr[10]; //Initialized variable to store recieved data

void setup() {

Serial.begin(9600);

lcd1.init();

lcd1.clear();

lcd1.backlight();

}

void loop() {

Serial.readBytes(mystr, 5); //Read the serial data and store in var

lcd1.setCursor(0,0);

lcd1.print("Temp ");

lcd1.print(mystr);

delay(1000);

}

reference:

Chuanshuoge