About John E KVAM

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 · 2022-01-25

I have software that runs on the Nucleo F401RE, and I install it by searching for the NODE_F401RE 'disk drive'. But recently I've noticed that some Nucleo boards register as NOD_F401RE (no E) drives. And of course this makes a mess of my download. Ca...

John E KVAM · 2024-04-25

When testing like this - point the sensor at something closer so that you absolutely know that there is a target in the field of view. First thing to do is verify you have at least on target. Next check the Range_Status. 5, 6, 9 and maybe 12 are vali...

John E KVAM · 2024-04-25

In that code there is a function that sets the resolution. I think you are doing only half the work. uint8_t vl53l5cx_set_resolution( VL53L5CX_Configuration *p_dev, uint8_t resolution) This tells the sensor what the resolution is and a...

John E KVAM · 2024-04-25

The sensor will never give you zero, unless your object is very close indeed. An error would return a distance of 8192 minus the error number. So no-signal would return 8190 (no signal being error 2). I'm not sure what threshold percentage is in thi...

John E KVAM · 2024-04-25

Writing in a block is fine. We were trying to write the most basic code we could and write_multi() was dropped as one generally does not initialize the sensor very often and it's one less function a user has to migrate. The sensor is going to return...

John E KVAM · 2024-04-25

It bothers me that you are getting some 1600 mm when you say there is no object in front of your sensors. With no object you should be getting a 'no signal' Range Status =2. That means any range information is probably suspect. It looks to me like t...

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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?"

Nucleo F401RE registering as NOD_F401RE instead of NODE_F401RE

Re: VL53L5CX works for the default VL53L5CX_RESOLUTION_4X4, but not for VL53L5CX_RESOLUTION_8X8

Re: VL53L5CX works for the default VL53L5CX_RESOLUTION_4X4, but not for VL53L5CX_RESOLUTION_8X8

Re: VL53L4CD - Signal is below the defined threshold

Re: VL53L4CD - Signal is below the defined threshold

Re: VL53L4CD - Signal is below the defined threshold