PT1000 to KC868-A8 by ADC

[bousbouss]

Hi,

Is it possible to connect a 2-wire PT1000 sensor to the KC868-A8 (by using ADC)?
I connected my PT1000 to A1 and GND, but i get these readings in esphome:

[12:20:21][D][sensor:094]: 'Temperature_4': Sending state 0.14200 V with 2 decimals of accuracy
[12:20:22][D][sensor:094]: 'Temperature_3': Sending state 0.14200 V with 2 decimals of accuracy

with this setup:
sensor:
  - platform: dallas
    address: 0x453c3ee381b36028
    name: "Temperature_1"
    id: Temperature_1
   
  - platform: dallas
    address: 0x783ce104577f4c28
    name: "Temperature_2"
    id: Temperature_2    
  - platform: adc
    pin: 34
    name: "Temperature_3"
    update_interval: 5s
    attenuation: 11db
  - platform: adc
    pin: 35
    name: "Temperature_4"
    update_interval: 5s
    attenuation: 11db  



I found this picture bellow, do I have to add 12v to the sensor? How do I do that if my PT1000 sensor has 2 wires? 

[admin]

no, can't connect with analog input directly. because our board analog input use by dc 0-5v signal.

[bousbouss]

Thank you for your quick reply.

Is there a way to connect my pt1000 to my KC868-A8?

How about with this https://esphome.io/components/sensor/max31865.html?

How would I connect that to the KC868-A8?

[admin]

if you can use K type thermocouple, you can use KinCony A24, that use by MAX31855, support 3CH K type thermocouple.

[bousbouss]

But I already have the Kincony KC868-A8. Is there not a way to connect a max31865 to this board? Maybe by using the 433mhz pins? Or via the IIC extender?

[admin]

no, MAX31865 use by SPI bus, A8 board not have SPI bus. if you can find out I2C bus solution chip,then you can use .

[bousbouss]

Is there another way to connect the pt1000 to the KC868-A8? (without a max31865)?

[admin]

you can use this: https://www.hicomponent.com/pt100-to-0-4...itter.html
PT1000 convert to 0-5v signal.

[bousbouss]

you can use this: https://www.hicomponent.com/pt100-to-0-4...itter.html
PT1000 convert to 0-5v signal.

Perfect! I will give this a try