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THERMO 4 click

THERMO 4 click


Regular price Rs. 949.00
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THERMO 4 click carries the LM75A digital temperature sensor and thermal watchdog. The sensor has the range from −55 °C to +125 °C. The click is designed to run on either 3.3V or 5V power supply. It communicates with the target microcontroller over I2C interface, with additional functionality provided by the INT pin on the mikroBUS™ line.

LM75A features

The LM75A is a temperature-to-digital converter using an on-chip band gap temperature sensor and Sigma-delta A-to-D conversion technique. The device is also a thermal detector providing an overtemperature detection output.

The sensor can be configured for different operation conditions. It can be set in normal mode to periodically monitor the ambient temperature, or in shutdown mode to minimize power consumption.

The temperature register always stores an 11-bit 2's complement data giving a temperature resolution of 0.125 °C. This high temperature resolution is particularly useful in applications of measuring precisely the thermal drift or runaway.


Type Temperature,Humidity
Applications System thermal management, personal computers, electronics equipment, industrial controllers
On-board modules LM75A
Key Features Temperature range: from −55 °C to +125 °C
Interface I2C,GPIO
Input Voltage 3.3V or 5V
Compatibility mikroBUS
Click board size S (28.6 x 25.4 mm)

Pinout diagram

This table shows how the pinout on THERMO 4 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes Pin Mikrobus logo.png Pin Notes
NC 2 RST INT 15 INT Overtemp Shutdown output
NC 3 CS TX 14 NC
NC 5 MISO SCL 12 SCL I2C-bus serial clock input
NC 6 MOSI SDA 11 SDA I2C-bus serial bidirectional data line
Power supply +3.3V 7 3.3V 5V 10 +5V Power supply
Ground GND 8 GND GND 9 GND Ground

Jumpers and settings

Designator Name Default Position Default Option Description
JP1 VCC.SEL. Left 3V3 Power Supply Voltage Selection 3V3/5V, left position 3V3, right position 5V
JP2 ADD0 Left 0 I2C address select bit 2
JP3 ADD1 Left 0 I2C address select bit 1
JP4 ADD2 Left 0 I2C address select bit 0


Code examples for THERMO 4 click, written for MikroElektronika hardware and compilers are available on Libstock.

Code snippet

The following code snippet shows the main function of the example, which initializes the system, then writes data into the register, then reads that data for confirmation, and then reads the current temperature value, and shows that value in degrees Fahrenheit.

01 void main()
02 {
04 system_init();
05 thermo_init(0x55);
06 Delay_ms (100);
07 i=5;
10 /*sets the temperature limit to specified float value*/
11 thermo_write_temperature (65.5, THERMO_TOS);
12 /*reads stored temperature limit*/
13 thermo_read_temperature_text (uart_text, THERMO_TOS);
14 Delay_ms (100);
16 UART_Write_Text("rn Current temperature limit for output signal: ");
17 UART_Write_Text(uart_text);
18 Delay_ms( 1000 );
20 /*reads current temperature in fahrenheit*/
21 _fh_value = thermo_read_temperature_fh (THERMO_TEMP);
22 FloatToStr (_fh_value , uart_text);
23 uart_text [5] = 0;
24 Delay_ms (100);
25 UART_Write_Text("rn rn Current temperature in Fahrenheit: ");
26 UART_Write_Text(uart_text);
27 Delay_ms( 1000 );

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