Mikroelektronika d.o.o.
Thermo 23 Click Board
Thermo 23 Click Board
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The Thermo 23 Click Board™ is a compact add-on board that provides an accurate temperature measurement. This board features the TMP144, a high-precision digital temperature sensor from Texas Instruments. The temperature sensor in the TMP144 is the chip itself, that houses temperature sensor circuitry, 12-bit analog-to-digital converter (ADC), a control logic, and a serial interface block in one package. Characterized by its high accuracy (up to ±0.5°C typical) and high resolution of 0.0625°C, this temperature sensor provides temperature data to the host controller with a configurable UART interface. This Click board™ is appropriate for thermal management of various consumer, industrial, and environmental applications with many temperature measurement zones that need to be monitored.
The Thermo 23 Click Board™ is supported by a mikroSDK compliant library, which includes functions that simplify software development. This Click board™ comes as a fully tested product, ready to be used on a system equipped with the mikroBUS™ socket.
How Does The Thermo 23 Click Board™ Work?
The Thermo 23 Click Board™ as its foundation uses the TMP144, a digital temperature sensor optimal for thermal management and thermal profiling applications from Texas Instruments. This temperature sensor is characterized by high accuracy; a temperature range of -10°C to +100°C provides typical ±0.5°C accuracy. The temperature sensing device for the TMP144 is the chip itself. A bipolar junction transistor inside the chip is used in a band-gap configuration to produce a voltage proportional to the chip temperature. The voltage is digitized and converted to a 12-bit temperature result in degrees Celsius, with a resolution of 0.0625°C.
The TMP144 possesses several operational modes: Continuous-Conversion mode (CC), Shutdown, One-shot mode, and Extended Temperature mode, which increases the temperature-measurement range from -40°C to +120°C. In the CC mode, ADC performs continuous temperature conversions and stores each result to the temperature register, overwriting the result from the previous conversion, while Shutdown modes reduce power consumption in the TMP75C when continuous temperature monitoring is not required, typically less than 0.5μA. Also, while the TMP144 is in Shutdown mode, it can perform a one-shot temperature measurement and return to the Shutdown state after the single conversion.
The Thermo 23 Click Board™ communicates with MCU using the UART interface with commonly used UART RX and TX pins as its communication protocol operating at 115200bps by default configuration to transmit and exchange data with the host MCU. This interface can also be seen as both UART and SMAART Wire™ interface, supporting daisy-chain configurations. Besides, the interface also supports Multiple Device Access (MDA) commands that let the host communicate with multiple devices on the bus simultaneously.
This sensor's special and equally important feature is its software interrupt, a temperature alert function that monitors the device temperature and compares the result to the values stored in the temperature limit registers to determine if the device temperature is within these set limits. The TMP144 does not issue future interrupts until the user writes sets the interrupt enable bit in the configuration register to re-enable future interrupts.
The Thermo 23 Click Board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
| Type | Temperature & humidity |
| Applications | The Thermo 23 Click Board™ can be used for thermal management of various consumer, industrial, and environmental applications with many temperature measurement zones that need to be monitored |
| On-board modules | TMP144 - high-precision digital temperature sensor from Texas Instruments |
| Key Features | Low power consumption, high precision, UART interface, temperature sensor in the TMP144 is the chip itself, resolution of 0.0625°C, shutdown and one-shot mode, high accuracy, and more |
| Interface | UART |
| Compatibility | mikroBUS |
| Click board size | S (28.6 x 25.4 mm) |
| Input Voltage | 3.3V |
PINOUT DIAGRAM
This table shows how the pinout of the Thermo 23 Click Board™ 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 | NC | ||
| NC | 3 | CS | RX | 14 | TX | UART TX | |
| NC | 4 | SCK | TX | 13 | RX | UART RX | |
| NC | 5 | MISO | SCL | 12 | NC | ||
| NC | 6 | MOSI | SDA | 11 | NC | ||
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | NC | |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
THERMO 23 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | - | 3.3 | - | V |
| Temperature Accuracy | - | ±0.5 | ±0.1 | °C |
| Temperature Resolution | - | 0.0625 | - | °C |
| Operating Temperature Range | -40 | +25 | +120 | °C |
Software Support
We provide a library for the Thermo 23 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Library Description
This library contains API for the Thermo 23 Click Board™ driver.
Key functions
-
thermo23_set_configThis function sets the configuration register. -
thermo23_read_temperatureThis function reads the temperature value in Celsius. -
thermo23_read_commandThis function reads data from the selected command by using UART serial interface.
Example Description
This example demonstrates the use of the Thermo 23 Click Board™ by reading and displaying the temperature measurements.
void application_task ( void )
{
float temperature;
if ( THERMO23_OK == thermo23_read_temperature ( &thermo23, &temperature ) )
{
log_printf( &logger, " Temperature : %.2f Crnn", temperature );
Delay_ms ( 1000 );
}
}
The full application code, and ready to use projects can be installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Other MikroE Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.Thermo23
Additional Notes and Information
Depending on the development board you are using, you may need a USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.
MIKROSDK
The Thermo 23 Click Board™ is supported with mikroSDK - MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.
Thermo 23 Click Board
Frequently Asked Questions
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