Fever click

Product Code: MIKROE-2554

Brand: MikroElektronika

0 reviews | Write a review

₹1,159.00

GST inclusive

Qty:

Availability: Backorder

Add to Wish List

Fever click measures your body temperature with the accuracy of 0.1°C (37°C to 39°C). The click carries MAX30205 human body temperature sensor. Fever click is designed to work on a 3.3V power supply. It communicates with the target MCU over I2C interface.

MAX30205 sensor features

The MAX30205 temperature sensor accurately measures temperature and provide an overtemperature alarm/interrupt/shutdown output.

This device converts the temperature measurements to digital form using a high resolution, sigma-delta, analog-to-digital converter (ADC). An I2C-compatible two-wire serial interface allows access to conversion results.

The MAX30205 has 0.1°C accuracy (37°C to 39°C), and 16-Bit (0.00390625°C) temperature resolution.

How it works

Take a look at how Fever click reads the body temperature, and the results are shown on the mikromedia PIC32:

For this demo we measured the temperature from the palm of the hand, so the shown results are a couple of degrees lower than the average human body temperature.

Normal body temperature

The normal body temperature, of a healthy person, is 37°C. But this depends on various factors, like the age and sex of the person, the temperature of the room the person is in, the time of the day, etc.

A body temperature above 37.5°C up to 40°C is considered a fever.

Specifications

Type	Temperature,Humidity
Applications	Fitness and medical applications
MCU	MAX30205 human body temperature sensor
Key Features	0.1°C Accuracy (37°C to 39°C), 16-Bit (0.00390625°C) temperature resolution
Interface	I2C,GPIO
Input Voltage	3.3V
Compatibility	mikroBUS
Click board size	M (42.9 x 25.4 mm)

Pinout diagram

This table shows how the pinout on Fever click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	NC
	NC	2	RST	INT	15	OS	Overtemperature Shutdown Output. Open-drain.
	NC	3	CS	TX	14	NC
	NC	4	SCK	RX	13	NC
	NC	5	MISO	SCL	12	SCL	Serial-Data Clock Input. Open-drain.
	NC	6	MOSI	SDA	11	SDA	Serial-Data Input/Output Line. Open-drain.
Power supply	+3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

Maximum ratings

Description	Min	Typ	Max	Unit
Supply Voltage	-0.3		4	V
Input Current at Any Pin		5		mA
Continuous Power Dissipation		1951.2		mW
Operating Temperature Range	0		50	°C

Programming

Code examples for Fever click, written for MikroElektronika hardware and compilers are available on Libstock.

Fever click library communicates with the sensor, and converts the measured data into useful format. It also contains functions for the configuration of the click.

Code snippet

The following code snippet shows initialization of the system, writing a value into the register, and then reading that value.

01 void main()
02 {
03    system_init();
04    fever_init(0x48);
05    Delay_ms (100);
06    /*sets the temperature limit to specified value*/
07    fever_write_temperature (37.80, FEVER_TOS);  
08    /*reads stored temperature limit, with 0.01 rounding error*/
09    fever_read_temperature_text (uart_text, FEVER_TOS);
10    
11    UART_Write_Text("rn Current temperature limit for output signal: ");
12    UART_Write_Text(uart_text);
13    Delay_ms( 1000 );