About John E KVAM

John E KVAM · 2024-07-08

I heard that ST has extended the lifetime of the L0, L1 and L3. Can you tell me what the new dates are and where on the website I can find them?

John E KVAM · 2023-02-01

Customer asks me how I evaluate where the photons go.

John E KVAM · 2022-07-19

I am checking signal status also for Big obstacle it showing Distance up to 2.1 meter(210Cm) and status is 0, and for small obstacle showing distance up to 1.2 meter(120 cm) and status is zero, it is not useful in outdoor environment , and it Hangs a...

John E KVAM · 2022-07-18

How can one adapt the WrMulti() and RdMulti() I2C functions for MCUs that have an I2C length limit? This is an oft-asked question.

John E KVAM · 2022-06-16

John E KVAM · 2024-11-02

It’s always dangerous to invest a lot of time and money on a part that is not released. I would not advise it. Best thing to do is go to the ST support page and find one of our sales associates. Let them contact or marketing team. Get an official es...

John E KVAM · 2024-10-31

A common I2C mistake. Not your fault. It's been an issue for nearly 25 years. /* Define a 7-bit address for each tof sensor */ const uint8_t deviceAddresses[NUMDEVICES] = {0x54, 0x55}; The I2C has a base address (0x29) and one shifts it left one bi...

John E KVAM · 2024-10-31

I see something... When you have multiple sensors - they all boot up at the same I2C address. 0x29 (Write address 0x52, read address 0x53). To solve this boot up one device as in: // Power on each sensor separately by setting it's LPN pin high HAL_...

John E KVAM · 2024-10-28

The CH chips are specially chosen because they are guaranteed to run the more demanding software and still meet the framerate specifications. The CX versions will run the CH software but are not guaranteed to do so. If you build lots of devices, you ...

John E KVAM · 2024-10-28

The trick is to find the center of mass of an object. To do this, one isolates the object by looking for zones with approximately the same distance. If a person is standing in front of the sensor all his distances will be 50cm +/- 10, for example. ...

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VL53L0, VL53L1 and VL53L3 Longevity

Where do the photons go?

Typical issues with VL53L1X, range and status

I2C multi-byte read and write functions with i2C byte limit.

Customer asks, "I am using VL53L1X , code works fine when there is obstacle in the range of 0 to 4 meter ,if no obstacle above 4 meter sensor is giving random values , how we can fix this issue?"

Re: VL53L9CA Availability

Re: Error getting ranging data vl53l5x 8x8 mode.

Re: Error getting ranging data vl53l5x 8x8 mode.

Re: Difference Between CX and CH models - St's ToF

Re: How to calculate human position for Smart Presence Detection (SPD) with ToF sensor