Imaging (sensors)

Hello Everyone, I'm using the VL53L4CD with the STM32WL55JC1, The following is the Power Profile of the cycle:1- XSHUT GPIO is normally pulled low.2- XSHUT Pulled up + delay ( sensor wakes up).3- VL53L4CD Initiliazation.4- Measurements (20 Samples).5- XSHUT Pulled Low again. Just after the initializing of the VL53L4CD, the current consumption was 4.45uA, then after HW-Standby, I can't get less than 332uA!?    Why this high amount of consumption even if the XSHUT is Pulled Low? Th

Hi All,I am trying to implement VD6281 readout layer and I do struggle with quite random '0' return value with relatively intense light exposure.The implemented script automatically adjust sensor gain. For relatively high register values [15..12] what correspond to gain equal to 1 and lower (basically attenuation) - used for intense light exposure - sensor returns 0 and trigger script gain increase what causes algorithm latch.For instance, readouts with the same light exposure:Ch: 0 gain: 13 value: 2649333 calc value: 2649333Ch: 1 gain: 13 value: 0 calc value: 0  (ought to be :value 1097992 and  calc value: 1097992)Ch: 2 gain: 13 value: 1139807 calc value: 1139807Ch: 3 gain: 13 value: 3132285 calc value: 3132285Ch: 4 gain: 13 value: 7223551 calc value: 7223551Ch: 5 gain: 13 value: 7223551 calc value: 7223551And the differe

VL53L1CB必须配置其 ROI（感兴趣区域）以定义要读取的“单元格”网格。如果不设置 ROI，则只能获得一个合并的距离值，该值将来自所有 SPAD 的信号求和，并且您将无法获取每个子区域的解析数据。上述说法正确吗？Please note that the official forum language it English - see the Community Terms & Conditions.Google Translate:The VL53L1CB must have its ROI (Region of Interest) configured to define the grid of "cells" to be read. Without setting the ROI, you will only get a single combined distance value that sums the signals from all SPADs, and you will not be able to obtain resolved data for each sub-region. Is this correct?

We plan to implement a VL53L1X driver based on this API for our Open Source Real-Time OS (community project) and would have to publish the API source code (content of directory STSW-IMG009_v3.5.4/API only) either as part of the GitHub repository of the OS or as a separate GitHub repository to use it as a package.I had to accept the PLLA (SLA0081) to get the VL53L1X ULD API (STSW-IMG009) which restricts the use and the distribution of the code a lot. On the other hand this PLLA (SLA0081) also says that some portions of the licensed materials might contain Open Source Software subject to Open Source Terms.The files in the API itself tell * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS.And the `License.txt` in directory `STSW-IMG009_v3.5.4/API` say

Hi, Could someone please point me to where I can find the API or programming guide (which i2c reg to read the range data, which reg to set mode etc.) document for the VL53L7CH. I have looked everywhere and the only thing I can find is the ULD examples from ST. For me, these aren't very straightforward to convert into a C/C++ library :( I would like to write a library for ESP32/Arduino to use VL53L7CH, I found a repo for VL53L8CX but I am hoping to find a bit more documentation specifically for the L7CH so I can extend the library to read the histogram on the CH version. Any help would be appreciated :) Thanks,Calvin

I've been trying to get two Adafruit VL53L4CD's to work without a multiplexer on my Arduino R4 WiFi, and am getting stuck after getting one reading. I'm largely drawing on the code discussed here, and have also changed up the bits that nh1628 discussed at the end of the thread so that it matched. I am not sure why it seemed to work for them, but not in my case: #include <Arduino.h> #include <Wire.h> #include <vl53l4cd_class.h> #include <string.h> #include <stdlib.h> #include <stdio.h> #include <stdint.h> #include <assert.h> #include <stdlib.h> // Define I2C bus #define DEV_I2C Wire // Define Serial Port #define SerialPort Serial // Define Built-IN LED #ifndef LED_BUILTIN #define LED_BUILTIN 13 #endif #define ledPin LED_BUILTIN // set the pi

Hi there, we recently purchased the VL53L8CH and are hoping to take advantage of its advanced capabilities for use in a small embedded product (without having to use a desktop GUI or large ST expansion board).Can you tell us more about the advanced AI applications (sensing solid materials like glass vs ceramic, sensing liquids, gesture motion detection, hand posture)?What exactly is the "AI enabler" in this package and do you have software we can review or explanations of how these functions work?I read about the coffee cup application here (rim and fill level detection): https://www.st.com/resource/en/application_presentation/26oct2023-artificial-intelligence-enabler-time-of-flight-sensors-with-cnh-data.pdf and also read MZ “CH” Product Training - Part 1 and 2

Hi, I am currently testing the VL53L7CX ToF sensor. During my evaluation, I came across the parameter "range sigma", but I could not fully understand what it actually represents.In addition, while creating a correlation map, I noticed that the most influential feature affecting distance measurements is the range sigma value.I would greatly appreciate it if anyone clarified what exactly "range sigma" indicates, and how the sensor calculates or measures this value. Can anyone enlight me?Thanks

I'm currently trying to use the VL53L5CX to detect motion in the range of about 1m in front of the sensor.This seems to work fine indoors - but outdoors - I don't seem to be able to get anything more than around 30cm, even with xtalk calibration, and a shroud.I don't actually need 8x8 or even 4x4 - i basically just need to see if there is something passing in front of the sensor (think beam breaking - but with just one device)Am I missing something ?Is there some config to increase outdoor performance ? Should I use a different sensor ? Any thoughts gratefully received.

Hi,Been a while :) Seeing some odd readings after the sensor has no real changes.  After some time when a change in the sensor distance happens it "seems" to take many readings to get good readings.Is there a sleep I don't know about? What is the recommended way to "wake up" the sensor if it has been dormant for some time......or am I imagining this? Thanks,Will 

When using the VL53L1CB for ranging, we want to achieve lower power consumption by reducing the measurement frame rate. I performed the following two experiments:A 50ms measurement budget (integration time) followed by a 50ms waiting period.A 50ms measurement budget followed by a 100ms waiting period.I observed that the power consumption in both scenarios is nearly identical, with no significant difference. Using a photodetector, we confirmed that the ToF sensor's light emission time aligns with the measurement budget; a 50ms integration time results in approximately 50ms of light emission, confirming my parameter settings are effective. The power consumption curve shows that the power level remains high even after the ToF sensor has finished emitting light.How can we reduce the power consumption during the waiting interval between measurements (without shutting down the sensor)?If shutting down the sensor after each measurement achieves lower power con

VL53L1CB的最低投资回报率配置是 4x4？我可以将其配置为 1x1 吗？ Translated : The minimum ROI configuration for the VL53L1CB is 4x4? Can I configure it as 1x1?

Hello!I am using the VL53L4CD TOF Sensor as sold by Adafruit. I am running it with the circuit patched together as described in the example file VL53L4CD_Sat_HelloWorld.ino, also with the exact code (the only change being the port number). I am using an Arduino R4 WiFi. When I start the unit up, it runs normally for a bit (<1 min), and then stops.Starting... Status = 0, Distance = 37 mm, Signal = 232 kcps/spad Status = 0, Distance = 38 mm, Signal = 234 kcps/spad Status = 0, Distance = 35 mm, Signal = 233 kcps/spad Status = 0, Distance = 36 mm, Signal = 230 kcps/spad Status = 0, Distance = 39 mm, Signal = 236 kcps/spad Status = 0, Distance = 35 mm, Signal = 234 kcps/spad ...I have an Arduino R3 Uno, and tested the TOF sensor using that, and it seemed to run endlessly.Based on reading around, I am guessing this has something to do with the resistors required for I2C connections and some builtin differen

Hello,I am using the 53L8A1A to evaluate the VL53L8CH with the MZAI_EVK_v1.0.1 software. For my application, I need high CNH resolution for as long a histogram as possible, but for only one histogram. Because of that, I aggregated down to one row and one column with the following configuration settings. CNH_4x4_ONECNH: StartType: 0 Resolution: 16 RangingPeriod: 500 ZoneMode: 2 GlareFilter: 0 ExtendedMode: 2 cnhStartX: 0 cnhStartY: 0 cnhMergeX: 4 cnhMergeY: 4 cnhCols: 1 cnhRows: 1 cnhNumBins: 75 cnhSubSample: 1 isDefault: false isVisible: trueI see in the CNH_Data_Size sheet within the MZ-AI_Configuration Excel sheet that the MZ-AI GUI limits the cnhNumBins parameter to 75. The calculator says that the data size for more bins than that does work, however.Is there a reason that the parameter is limited to 75 and, if not, is there an easy way for me to change that limit?Thanks,

I am trying to use the VL53L3CX with an STM32G070 for water level sensing. The app is based upon the Simple Ranging example.What I am seeing is that the distance read by the sensor alternates between two values, quite far apart. The sensor is mounted in a stable position for this testing, a little less than an inch from a flat white target.Pointers on how to debug this would be much appreciated.Sid 

Hello ST team,I'm currently working with the **SmartPresenceDetectionEVK v1.0.0** on a setup consisting of:- **NUCLEO-F401RE**- **X-NUCLEO-53L8A1**- Firmware version: **1.7.0.0**- Driver version: **VL53LMZ_2.0.10**When I interact with the board using **Tera Term via UART**, everything works perfectly. I can use commands such as `enable`, `help`, and receive presence detection results in real-time.However, when I try to launch the provided **SmartPresenceDetectionEVK.exe** GUI on Windows 11, I encounter the following unhandled exception: --------------------------------------------------------------------------------2025-04-03, 10:32:13--------------------------------------------------------------------------------<class 'wmi.x_wmi'>:<x_wmi: Unexpected COM Error (-2147217396, 'OLE error 0x8004100c', None, None)>--

Our use of the VL534LCD is within what we call a bin.  A long rectangular container.  The sensors job is to measure the distance to items placed into the bin.  Very contained environment with little interference.  When we calibrate the sensor we do this when our bin is empty.  There is a white panel always at the beginning of the container bin which moves forward (backwards) along a track when items are placed in it or taken out.  When it is empty it is stationary at 231mm.  So,  we calibrate using 231mm.When we calibrate to 231mm we get back offsets from the sensor > -45.  These seem unusually large to me? Why would this be?  

Hello,For a project I would like to use the VL53L4CD or VL53L4ED to measure distances in the range of ~1 cm to 80 cm. The expected ambient temperatures can vary (maximum between -10°C and +80°C, although the temperature will usually be in the range of 0°C to 50°C). Initial tests showed promising measurement results under real conditions.The project requires a minimum service life of 10 years for the components used. I know from other projects that such a long operating life is often a problem e.g. for laser diodes.Are there any recommended strategies for maximizing the sensor's service life?Should I e.g. provide a cut-off option for the sensor's supply voltage to protect it when it does not need to be active? Or would the HW standby state have the same effect?Thank you in advance for your help.

Hi, Is it possible to get some sort of frame timestamp from the evaluation boards? Ideally, I would love to have start and end of exposure timestamps but any timestamp from the sensor would be great. I could timestamp when I receive the frame on my device, but that might not be accurate enough for my application since it would also include other delays from my computer. Inaccuracies in the 10s of microseconds range are acceptable. Thanks.

The STSW-IMG009 VL53L1X ULD API (Ultra Lite Driver Application Programming Interface) has a bug in the function VL53L1X_SensorInit that blocks the code from being executed if  status |= VL53L1X_CheckForDataReady(dev, &tmp);  write 0 constantly in tmpThe block  while (tmp == 0) { status |= VL53L1X_CheckForDataReady(dev, &tmp); }has no timeout implemented and, for instance, if a cable or a sensor breaks for some reason, the code will endup stuck therePlease also see this github issue exit VL53L1X_SensorInit() after timeout if no sensor / sensor doesn't work · Issue #29 · sparkfun/SparkFun_VL53L1X_Arduino_Librarywhere a timeout is adde

Do the current VD56G3 drivers support the CM5 module? I have followed the installation guides several times (including building libcamera from the ST source files) and I can't get libcamera to stream the camera. Here is the error message:$ libcamera-hello [0:18:08.863706754] [1547] INFO Camera camera_manager.cpp:326 libcamera v0.5.0 [0:18:08.870764844] [1548] INFO RPI pisp.cpp:720 libpisp version v1.2.0 50426319aa1a 02-07-2025 (19:52:09) [0:18:08.887921079] [1548] INFO RPI pisp.cpp:1179 Registered camera /base/axi/pcie@1000120000/rp1/i2c@88000/fox@10 to CFE device /dev/media2 and ISP device /dev/media0 using PiSP variant BCM2712_D0 Preview window unavailable Mode selection for 562:682:12:P R8,320x240/0 - Score: 3558.98 R8,480x640/0 - Score: 2470.14 R8,640x480/0 - Score: 2614.48 R8,768x1024/0 - Score: 2359.14 R8,1024x768/0 - Score: 2327.98 R8,720x1280/0 - Score: 2973.64 R8,1024x1280/0 - Score: 2337.14 R

Hi, I'm curious to see if it is possible to connect more than one STEVAL-EVK-U0I boards to a computer and read images of all of them? The SDK has  an init function that allows you give a board id, but it is unclear what the board id means or if it will give the desired effect. Any help is appreciated.  Thanks

Dear ST team,Hello, I am using the VL53L1CX with the 3.2.1 library and have noticed that when measuring the distance to an iPhone, the results are not very accurate and tend to jump between several different distances. Is this caused by the iPhone’s Face ID sensor, the reflective glass surface of the iPhone, or some other reason? What can I do to improve the measurement accuracy in this scenario?Thank you for your help.

Hi All,I'm developing a proximity switch using VL53L4CDMy unit works perfectly 99.9% of the time but I’m seeing occasional instances where the unit triggers very briefly even when there’s nothing in range. It may go an hour between such events, even several hours, but equally it can on rare occasions do it twice in a minute. It’s almost like a fly flew through the beam. It’s literally on in one frame and off again in the next.I’m using the UL driver without thresholds (RS_IT_DEFAULT), since I need to enforce some hysteresis. My ranging frequency is 20Hz. The unit has the standard cover glass and I’m calibrating it before use with a 17% target. I get the problem whether or not the cover glass is fitted, and the amount of ambient light doesn’t seem to be a factor.I only allow a change of state to ‘on’ when ToF status = 0 and distance <= threshold, so that must be happening occasionally even when there’s no target.This is a production ready pcb but

Hi,I'm working on a people counting system using the VL53L1X in multi-zone mode with a single sensor. It works well in general, but I'm seeing accuracy issues when people wear black or dark clothing—likely due to low reflectivity.I’d appreciate some guidance:Would the VL53L5CX provide better detection for dark clothing?Does it handle low-reflectivity surfaces more reliably?Or would it be better to use multiple VL53L1X sensors?Any other sensor recommendations for more reliable people detection?Thanks in advance!Basil