Anybody worked with temperature sensors like DS3231 RTC Module ,DHT11 or any other with HIFIVE1?
if so, i need your help!
Because i want to do a mini project with temp sensors,i 've got a sample code from one of the tutorials sites , i tried it with HIFIVE1 with some modifications in that code ,i am getting some following errors.
…Downloads/DemoPrograms/ILI9341_RTC/ILI9341_RTC.ino:93: undefined reference to `String::String(float, unsigned char)'
collect2: error: ld returned 1 exit status
exit status 1
Error compiling for board HiFive 1.
and my code is show
#include “Adafruit_GFX.h”
#include “Adafruit_ILI9341.h”
#include <Wire.h>
//#include <iostream.h>
#include “Sodaq_DS3231.h”
#include <SPI.h>
//added manually
extern “C”
{
void *__dso_handle = NULL;
}
#define TFT_DC 9
#define TFT_CS 10
#define TFT_RST 8
#define TFT_MISO 12
#define TFT_MOSI 11
#define TFT_CLK 13
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST, TFT_MISO);
float maxTemperature=0;
float minTemperature=200;
char charMinTemperature[10];
char charMaxTemperature[10];
char timeChar[100];
char dateChar[50];
char temperatureChar[10];
float temperature = 0;
float previousTemperature = 0;
uint32_t old_ts;
String dateString;
int minuteNow=0;
int minutePrevious=0;
//added Manually from
char *dtostrf (float val, signed char width, unsigned char prec, char *sout) {
char fmt[20];
sprintf(fmt, “%%%d.%df”, width, prec);
sprintf(sout, fmt, val);
return sout;
}
void setup(){
Serial.begin(9600);
tft.begin();
tft.setRotation(0);
tft.fillScreen(ILI9341_BLACK);
Wire.begin();
rtc.begin();
// printText(“TEMPERATURE”, ILI9341_GREEN,20,130,3);
// printText(“MAX”, ILI9341_RED,37,260,2);
// printText(“MIN”, ILI9341_BLUE,173,260,2);
//setRTCTime();
}
void loop()
{
float temperature = rtc.getTemperature();
DateTime now = rtc.now(); //get the current date-time
uint32_t ts = now.getEpoch();
if (old_ts == 0 || old_ts != ts) {
old_ts = ts;
minuteNow = now.minute();
if(minuteNow!=minutePrevious)
{
dateString = getDayOfWeek(now.dayOfWeek())+", “;
dateString = dateString+String(now.date())+”/"+String(now.month());
dateString= dateString+"/"+ String(now.year());
minutePrevious = minuteNow;
String hours = String(now.hour());
if(now.minute()<10)
{
hours = hours+":0"+String(now.minute());
}else
{
hours = hours+":"+String(now.minute());
}
hours.toCharArray(timeChar,100);
tft.fillRect(50,50,135,40,ILI9341_BLACK);
// printText(timeChar, ILI9341_WHITE,55,55,4);
dateString.toCharArray(dateChar,50);
// printText(dateChar, ILI9341_GREEN,8,5,2);
}
if(temperature != previousTemperature)
{
previousTemperature = temperature;
String temperatureString = String(temperature,1);
temperatureString.toCharArray(temperatureChar,10);
tft.fillRect(50,175,150,40,ILI9341_BLACK);
// printText(temperatureChar, ILI9341_WHITE,50,180,4);
// printText(“o”, ILI9341_WHITE,158,175,3);
// printText(“C”, ILI9341_WHITE,180,180,4);
if(temperature>maxTemperature)
{
maxTemperature = temperature;
dtostrf(maxTemperature,5, 1, charMaxTemperature);
tft.fillRect(8,280,90,28,ILI9341_BLACK);
// printText(charMaxTemperature, ILI9341_WHITE,8,290,2);
// printText(“o”, ILI9341_WHITE,70,280,2);
// printText(“C”, ILI9341_WHITE,85,290,2);
}
if(temperature < minTemperature)
{
minTemperature = temperature;
dtostrf(minTemperature,5, 1, charMinTemperature);
tft.fillRect(145,280,90,28,ILI9341_BLACK);
// printText(charMinTemperature, ILI9341_WHITE,145,290,2);
// printText(“o”, ILI9341_WHITE,207,280,2);
// printText(“C”, ILI9341_WHITE,222,290,2);
}
}
}
delay(1000);
}
void setRTCTime()
{
DateTime dt(2018, 4, 2, 13, 13, 30, 1); // Year, Month, Day, Hour, Minutes, Seconds, Day of Week
rtc.setDateTime(dt); //Adjust date-time as defined ‘dt’ above
}
void printText(char *text, uint16_t color, int x, int y,int textSize)
{
tft.setCursor(x, y);
tft.setTextColor(color);
tft.setTextSize(textSize);
tft.setTextWrap(true);
tft.print(text);
}
String getDayOfWeek(int i)
{
switch(i)
{
case 1: return “Monday”;break;
case 2: return “Tuesday”;break;
case 3: return “Wednesday”;break;
case 4: return “Thursday”;break;
case 5: return “Friday”;break;
case 6: return “Saturday”;break;
case 7: return “Sunday”;break;
default: return “Monday”;break;
}
}
but the same code gets successful compilation with arduino uno board.
I checked with the WString.h/.c in the arduino packages and compared it with arduino files also.Couldn’t get the exact problem.