KC868-A and ds18b20

[kulibin]

I want to connect the temperature sensors ds18b20.
How many sensors can be connected to the S1 conector?
 Do I need to connect an additional resistor to the 4,7K?

[admin]

i don't know which board model you are asking?
maybe you are using KC868-A8, one 1-wire port only use by one sensor. it have pull up resistor on PCB already.

[mainmind]

KC868-A8
v2.2.12

How many DS18B20 sensors can be installed at the same time?
On the configuration page there are 4:

   

I have tested the probes/sensors separately and both work, but connecting them at the same time only shows the value of one

Is it possible to display the ROM code somewhere? Is it possible to modify the scan time?

[admin]

one gpio only support one ds18b20 sensor.

[mainmind]

one gpio only support one ds18b20 sensor.

My fault, when I see this picture:

   

I assumed that only S1 could be used for DS18B20 sensors with one-wire bus, when in fact it is clear that each S1,S2,S3,S4 can be selected

Thanks! (and sorry)

[admin]

yes, S1--S4 all can use for 1-wire device.

[JuDie07]

Hello,
I think my problem fits in relatively well here: KC868-A8v3 and a ds18b20
I connected this directly without a resistor. I have also tried new ds18b20s.
None of them display anything, e.g. -100 °C. Connected to both S1 and S4 always the same!

[admin]

take a photo of your board how you wire.
take a photo of your KCS "SENSOR" webpage. how you setting.

[JuDie07]

take a photo of your board how you wire.
take a photo of your KCS "SENSOR" webpage. how you setting.

[admin]

here is updated firmware for KC868-A8v3

  KCS_A8V3_V3.11.7_beta_20250827-171730.zip (Size: 1.04 MB / Downloads: 163)
Tested A8v3 with 3pcs of DS18B20 sensors connect with S4,S3,S2 port.
   
   
set by KCS sensor webpage: