Imaging (sensors)

Hi  I am new to VL53L1X. Can anybody guide me as to how to get started with interfacing vl53l1x with nucleo f401re?

Hi Everyone, I am trying to interface TOF - VL53L8CX with Nucleo-G071RB using stm32 cube ide. I need support in setting up the code. I am referring to most of the datasheets and manuals but i am unable to get a correct code.Ref- 1) https://www.pololu.com/product/34192) https://os.mbed.com/platforms/ST-Nucleo-G071RB/#nucleo-pinoutThanksAbhishek Mitra

Hi, I have implemented the VL53L5CX driver for a Nordic controller, and it works fine. Now, I want to implement the VL53L7CX driver for the same Nordic controller. Can I use the VL53L5CX driver as is, or will I need to make changes? Additionally, are there any hardware modifications required, or can I use the same hardware as with the VL53L5CX?

Hi, I had a query regarding the VL53L0X TOF sensor. Is it possible to block the laser on the board and use an off board laser of same wavelength and get readings from TOF sensor? such as intensity readings only?   

Hello Community,I had a doubt and wanted an explanation to it relating to a document published by STM electronics, https://www.st.com/resource/en/application_presentation/26oct2023-artificial-intelligence-enabler-time-of-flight-sensors-with-cnh-data.pdfIn this document on Pg 22, when you were trying to calculate the Cup's height:Given: Sensor height from the base of the cup.Process: You said that because the rays will get reflected inside the cup, you are considering the FSB, i.e the First Significant Bin, which is the nearest bin from the left in the CNH histogram of Signal Value vs Bins. Then it was mentioned that the rim that is getting detected in CNH but not being shown in the zone_data (distance) is because of the fact that it is not creating the signal peak value. But then you mentioned this besides the histogram,• Thanks to the CNH and histogram shape, we can deduct all light path.• Using the FSB method (First Significant Bin), we easily extract the distance from the

Dear ST support,We are planning to replace the VL53L1X with the VL53L8CX. One difference we noticed is that the interrupt line on the VL53L8CX is now a ~100us pulse compared to the VL53L1X where it was active until the interrupt was cleared by writing a register on the sensor.We are using many sensors in our system that share a bus. To simplify routing we use an external GPIO expander which signals the processor in case any sensor set its INT line. Unfortunately this GPIO expander has a limitation which makes it impossible to detect pulsed interrupts from multiple devices if they follow each other in quick succession. So we came up with a couple of options:1. Change the behavior of the VL53L8CX sensor to only clear the INT line upon a command.2. Poll each sensor once we saw an interrupt from the GPIO expander.3. Do HW modifications on our board to help with this issue (e.g. use another GPIO expander).If possible we would like to avoid options 2 because this will degrade the perfor

Dear ST,I am looking for a solution with the integration of multiple ToFs such as VL53L0xObjective: 1. Find the distance between the ToF_x(emission only) and ToF_master(reception only)As the reception zone of vl53l0x is 25 degrees , either one or multiple ToFs could be detected with distance (NOTE : During operation either of ToF_x will be in linear movement to fall in reception zone ) Setup: ToF_1                   ToF_2                 ToF_3                         ToF_4                                                |    |                                            &nbsp

Hi,I am using VL53L4CX sensors with a custom-made board which uses the STMH755ZI. I am using the library provided by STM to get the sensor measurements.Initially, my tests were done using a Teensy 4.0. At that point, I noticed that a single VL53L4CX sensor takes around 3ms to get data through I2C when using the VL53L4CX library. However, when I switched to the VL54L4CD library, it was much faster, taking around 0.5ms per sensor. This includes all the data that the sensor provides.After that, I moved to the STMH755ZI. Since this is an STM chip, I thought it might be more compatible and faster compared to the Teensy, as the TOF sensor is also made by STM. Contrary to my expectations, the time it takes to read one sensor significantly increased. Using the VL53L4CX library, it takes around 10-11ms to read data for a single sensor. Then I tried the VL53L4CD library and was able to reduce the time to 1ms per sensor.I am working on a project with strict time constraints, so I commented out re

Does anyone know if the VL53L8CX SATEL can be used with an Arduino board (just for testing)? Or ESP32? I've tried the basic wiring I have done for other breakouts, but it doesn't work. If so, please share how it should be wired. Also, I have used very similar code on 1CB, 1CX, and the 4CX. Anyone know if that would work for the L8?

Hello,I plan to use a cover glass on top of a VL53L8CX sensor. I understand that I need to perform a calibration to account for the crosstalk effect. According to the forum and datasheet, this calibration requires using an object with a known reflectance percentage. I have two questions about this process:Can I use a board covered with printing paper, setting the reflectance percentage to 88%, and place it approximately 1 meter away from the sensor for calibration, as suggested in the comments?The datasheet mentions measuring reflectance with "vl53l8 REFLECTANCE_PERCENT." Can I use the value obtained from measuring my detected object's reflectance to calibrate the sensor when the cover glass is applied?Thank you.

Hello,I am designing a product based on VL53L4CDV0DH/1 ToF sensor,when purchased an evaluation board NUCLEO-53L4A1 It contains a small cover IR windowI want to use it in mass production,There is off the shelf such IR cover ?P/N ?Thanks,Eduard    

I am trying to connect two VL53L8CX time of flight sensors to STM32F401RET6. I need one I2C bus for both sensors but unable to assign slave address dynamically. I need to know where to modify the program in stm32cube IDE

Hi all,I'm working on a product that uses a TOF sensor (exact type# TBD) to identify if someone(s face) who is sitting in a chair is present within a certain distance and angle (around 20 degrees). If the right conditions are met the product should be switched on. I'm looking for ways to prevent the product from switching on based on false positives that the sensor receives from static objects when no on is actually present, such as wall, chairs etc. Appreciate your thoughts! 

I am currently trying to perform the Cross-talk calibration procedure, but I am confused because the procedures mentioned in the documents "Proximity and ambient light sensing (ALS) module" and "VL6180X cross talk compensation implementation" are somewhat different.The document "Proximity and ambient light sensing (ALS) module" mentions that the offset needs to be written before performing the measurement, but this is not mentioned in the document "VL6180X cross talk compensation implementation."Additionally, the "VL6180X cross talk compensation implementation" document uses RESULT__RANGE_RAW. Could you please advise which one I should follow? Thank you. 

hi anyone can please help me for the integrating vl53l0 sensor with rx71m mcu,because i am not getting specific document for communicating it with rx71m over i2c please support

Hi,i am using both the VL53L5 and L7 in a quite limited space, where the sensor need to run in the 8x8 continuous mode. Therefore, the thermal design is quite challenging.  So, my question is: what temperature does the sensor specifically deliver with the parameter "silicon_temp_degc"? Can it be assumed to be its junction temperature? If not, can a delta between silicon temperature and junction temperature be estimated?

In the guide to using the VL53L5CX multizone Time-of-Flight ranging sensor it's described that for periodic temperature compensation the function vl53l5cx_set_VHV_repeat_count has to be called.I can't find the function in any header or c file.

How can I permanently write values into the registers of the VL6180x? I tried modifying the loadSettings() in begin(), such as changing the value at 0x0041 to 0x60 and then marking it. However, after repowering, the value at 0x0041 in the VL6180x reverts to 0. Does this mean that the register is volatile memory? Or how should I modify the NVM to write the values I want?Thanks in advance.

Hello,the VL53L5CX and L7CX ULD guides mention that a target status of 6 and 9 should be considered with a confidence of 50 %, while a comment in the api.h file says that  "5 & 9 means ranging OK", which gives the impression of a higher confidence ration than 50 %. Therefore, my question is: how to exactly deal with measurements with the status 9?

Hello Community, I am new here and new to this field as well. I am currently using the VL53L8CH Lidar Sensor which has a MZAI some GUI tool to access and save data logs along with some visualizations of the data.I am currently doing some experimentation with the sensor and trying to understand the output data. I have the excel file through which I am accessing the CNH data.1. What does the CNH data even mean, why are some values -ve in it, the CNH plot provided by the BUI doesnt show any -ve values but the graph there is all in the +ve axes? My Experiment: Placing a flat white reflective square object at around 5 feet along with another larger flat white square object at 2 bins apart behind object 1 (considering the bin width to be around 222mm as the sensor is in 8x8 mode and the number of bins is 18 over the 4000mm range of the sensor). My Findings: When I drew histograms/bar graphs of these CNH values for the zones that were illuminated for Object 1 (the smaller objec

Calibration of ToF sensors requires a target which is '17% reflective'. Can I take it this means a simple peice of paper or card printed on a laser printer at 83% black (greyscale)?Thanks

I was using the sensor until now on an Raspberry Pi with direct access to the I2C bus without problems.Now I use an FT260 USB-I2C interface to communicate to the sensor from a PC via USB. In principle the communication is working, e.g. vl53l5cx_is_alive() works as expected.But the initialization fails. On the poll for sensor booted status I now always get a 9 as the answer instead of the expected 1 until the timeout is reached.In the documentation I haven't found any hint what the value of 9 at this point means.This is the place where vl53l5cx_init() fails:  /* Wait for sensor booted (several ms required to get sensor ready ) */ status |= WrByte(&(p_dev->platform), 0x7fff, 0x00); status |= _vl53l5cx_poll_for_answer(p_dev, 1, 0, 0x06, 0xff, 1); if(status != (uint8_t)0){ printf("vl53l5cx_init(): Wait for sensor booted failed\n"); goto exit; } And inside _vl53l5cx_poll_for_answer() I see that the returned value is 9. Because the expected value is 1 _vl53l5cx_poll_f

Hi there,  I am using multiple VL53L4CX sensors and the target is a person's hand within a 60cm range. I am wondering if there is a specific calibration method for a hand within a shorter range (60cm), to improve readings. Right now I am just using the default settings and using the STM32H755zi Any help is appreciated, thanks.  Isaac

I was able to run the vl53l5cx demo, however when calling 53l5cx_check_data_ready, I see that it reported a 'GO2'error. The code is C5.The content of the (relevant?) config.tempbuffer is 0, 5, C5, 81.How to figure out what is wrong here, is there an list of error codes of the GO2 error(s)?

Hi, I'm trying to use the VL53L0X sensor driver with zephyr and nRF52833, but I'm getting errors when the driver is trying to calibrate. Below are the errors returned by the log system: My question, how could I solve this, it seems to be a software problem right?