Microduino Temperature and Humidity sensor and display
Using Mixly (and a little tweak in Arduino IDE)
Mixly 'program':
In order to display only 1 decimal I tweaked the resulting Arduino sketch in the Arduino IDE:
#include <Wire.h>
#include <AM2321.h>
#include "U8glib.h"
float temp_reading;
float hum_reading;
char specialK;
String temp;
String hum;
float readByAM2321(int num) {
AM2321 am2321;
am2321.read();
float sensor_tem=am2321.temperature/10.0;
float sensor_hum=am2321.humidity/10.0;
delay(500);
if(num==1) {
return sensor_tem;
}
else if(num==2) {
return sensor_hum;
} else {
return 0.0;
}
}
U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE);
#define setFont_L u8g.setFont(u8g_font_fur20)
#define setFont_S u8g.setFont(u8g_font_fixed_v0r)
#define setFont_M u8g.setFont(u8g_font_9x18)
void setup()
{
temp_reading = 0.0;
hum_reading = 0.0;
specialK = 176;
temp = "";
hum = "";
Serial.begin(115200);
}
void loop()
{
temp_reading = readByAM2321(1);
hum_reading = readByAM2321(2);
temp = String(temp_reading, 1);
hum = String(hum_reading,1);
temp = String(temp) + String(String(String(" ") + String(String("")+specialK)) + String("C"));
hum = String(hum) + String(" %");
int(0);
u8g.undoRotation();
u8g.firstPage();
do {
setFont_L;
u8g.setPrintPos(20, 20);
u8g.print(temp);
setFont_L;
u8g.setPrintPos(20, 60);
u8g.print(hum);
} while( u8g.nextPage() );
Serial.println(temp_reading, 1);
Serial.println(hum_reading, 1);
delay(500);
}
The 'big' difference is the following:
temp = String(temp_reading, 1);
hum = String(hum_reading,1);
I used some LEGO Technics parts to put it all together:
