Mikroelektronika d.o.o.
LightRanger 5 Click Board
LightRanger 5 Click Board
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The LightRanger 5 Click Board™ is a compact add-on board that contains a ranging sensor with multi-target detection. This board features the TMF8801, a dToF (direct time of flight) optical distance sensor achieving up to 2500mm target detection distance from company AMS-TAOS. It offers highly accurate depth accuracy detection through a sub-nanosecond light pulse and an anti-aliasing "stop-watch" method to measure the round-trip time of the pulse. It makes precise distance measurements up to a 2500mm distance range, and it is capable of operation in dark environments and the presence of sunlight. This Click Board™ is suitable for presence (object) detection, distance measurement, industrial ranging, inventory control, optical switch, and many other applications.
The LightRanger 5 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 LightRanger 5 Click Board™ Work?
The LightRanger 5 Click Board™ as its foundation uses the TMF8801, an actual direct time-of-flight (ToF) sensor system in a single modular package from AMS-TAOS. It offers highly accurate depth accuracy detection through a sub-nanosecond light pulse and an antialiasing "stop-watch" method to measure the round-trip time of the pulse. It comes with an integrated microprocessor (Cortex M0) featured with all algorithms included on-chip with no need for external optics and an emitter that offers high dynamic range and detection sensing measurements from 20 to 2500 mm distances. Alongside these features, it also provides single-zone detection of an object irrespective of color, reflectivity, and texture.
The TMF8801 utilizes highly sensitive Single-Photon Avalanche Diode (SPAD) detection with fast, compact time-to-digital converters to make highly accurate distance measurements within ±5%. It is capable of operation in dark environments and the presence of sunlight. A built-in histogram is featured to detect cover glass and report object distances, operating with the highest Signal-to-Noise Ratio (SNR) while compensating for dirt and smudges contaminants on a product cover glass to produce artifact-free measurement. The histogram delivers dynamic cover glass calibration, and crosstalk compensation and background light noise are minimized through on-chip sunlight rejection filters.
The LightRanger 5 Click Board™ communicates with MCU using the standard I2C 2-Wire interface supporting Fast Mode operation with a clock frequency up to 1MHz. Also, it provides the possibility of the device Power-Up feature (Enable) routed to the CS pin of the mikroBUS™ socket, interrupt feature on the INT pin of the mikroBUS™ to optimize ranging operation, and two pins on the RST and PWM pins of the mikroBUS™ socket used as a general GPIO output signal.
The LightRanger 5 Click Board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with 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 | Optical |
| Applications | Can be used for presence (object) detection, distance measurement, industrial ranging, inventory control, optical switch, and many other applications. |
| On-board modules | TMF8801 - dToF (direct time of flight) optical distance sensor achieving up to 2500mm target detection distance from AMS-TAOS |
| Key Features | Direct ToF technology with high sensitivity SPAD detection, fast Time-to-Digital Converter (TDC) architecture, enables dark and sunlight environment distance measurement within ±5%, 20mm to 2500mm distance sensing, and more. |
| Interface | I2C |
| 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 LightRanger 5 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 | IO1 | General Purpose I/0 | |
| General Purpose I/0 | IO0 | 2 | RST | INT | 15 | INT | Interrupt |
| Enable/Shutdown | EN | 3 | CS | RX | 14 | NC | |
| NC | 4 | SCK | TX | 13 | NC | ||
| NC | 5 | MISO | SCL | 12 | SCL | I2C Clock | |
| NC | 6 | MOSI | SDA | 11 | SDA | I2C Data | |
| 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 |
LIGHTRANGER 5 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | - | 3.3 | - | V |
| Distance Measurement Range | 2 | - | 2500 | mm |
| Wavelength | - | 940 | - | nm |
| Operating Temperature Range | -30 | +25 | +70 | °C |
Software Support
We provide a library for the LightRanger 5 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 LightRanger 5 Click Board™ driver.
Key Functions
lightranger5_cfg_setup- Config Object Initialization function.lightranger5_init- Initialization function.lightranger5_default_cfg- Click Default Configuration function.
Example Description
This is an example that demonstrates the use of the LightRanger 5 Click Board™ board. This demo application shows an example of distance measurement.
void application_task ( void ) {
if ( lightranger5_check_data_ready( &lightranger5 ) == LIGHTRANGER5_DATA_IS_READY ) {
uint16_t distance_mm = lightranger5_measure_distance( &lightranger5 );
if ( distance_mm ) {
log_printf( &logger, " Distance : %ld mmrn", distance_mm );
} else {
log_printf( &logger, " Out of range rn", distance_mm );
}
log_printf( &logger, "------------------------------rn" );
}
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.LightRanger5
Additional Notes and Information
Depending on the development board you are using, you may need USB UART Click Board™, USB UART 2 Click Board™ or RS232 Click Board™ to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.
MIKROSDK
The LightRanger 5 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.
LightRanger 5 Click Board
Frequently Asked Questions
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