Hi, hope everyone is fine.

I give up... I need help. I am unable to store values in non volatile memory, so that if there is a power loss, and re-power, the value keeps the same... example, a temperature setpoint.

In my Arduino IDE environment I use: Node32s board (Is this the correct board?

This is the configuration I have in Arduino IDE:

GENERAL: 

#include <Preferences.h>

Preferences preferences; // Start preferences service.

SETUP:

  preferences.begin("almacenamiento-valores", false); // Start storage
  Serial.println("Escribiendo en NVS: 123");
  preferences.putInt("offset", 123); // Write a test value of 123 on the memory space called "offset".
 
  int valorLeido = preferences.getInt("offset", 0); // Reads the stored value.
  Serial.print("Leído de NVS: ");
  Serial.println(valorLeido); // Show the value that was stored.
  preferences.end();

Result I get on serial monitor: 

Escribiendo en NVS: 123
Leído de NVS: 0

Result: Writing the value was not successful. 

What am I doing wrong?
Would you advice using a different library for storing values?
Maybe the board I have selected on Arduino IDE is the wrong one?

Thank you for your help. 

BR, Juan

맑은 고딕]빠른 답변에 감사드립니다.
맑은 고딕]1. KC868-A16 보드의 PWM 출력 핀 맵은 자신 있다는 것을 알고 있습니다.
맑은 고딕]DC 모터를 제어하려고 합니다. IN1, IN2, ENA(속도 제어 PWM).
맑은 고딕]2. 경사 입력 핀이 반대 입력 핀

맑은 고딕]****개발 환경***
맑은 고딕]1.  KC868-A16
맑은 고딕]2.  아두이노 IDE 2.0.4
맑은 고딕]3.  DC 모터 12V, TB6600 스텝 모터 드라이버

hi,
i'm trying to connect some solenoid valve to the board .
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i don't undestand why

Hi Have a question about a how best to connect a signal that is about 1.2 - 2 volt. 
I presume I can not use the dry contact input 1 - 8 a they are 12v ?


Is there a way to get the board to detect a small 1.2 volt signal
Can I use inputs S1 - S4?

Thanks

I request a KC868-A4 equipment for education. I work for a school in Spain and we want to teach our students microcontroller programming and basic concepts of electricity and electronics.

Hi, I have the KC868-H32B board. I'm interested in how: can I connect the ZP13 Smoke Gas Sensor (like 7 sensors to one input slot)


All information about the module is provided here: https://www.winsen-sensor.com/d/files/manual/zp13.pdf
For this module's physical interface: XH2.54-4P terminal socket.


If this module is not compatible, could you recommend another one? But I need a module only.



Thx for your time and help who can replay me

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? 

Hi, I'm trying to connect the DHT21 sensor to the KC868 - A4S board but the firmware doesn't work. who can help me?

Attached Files

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Hello,

I have ordered a wall switch panel recently, however the the metal frame size is 86mm x 86mm and in EU the frame size is 73mm x 73mm.

It makes impossible to to put more that one switch next to each other. I added a photo of the EU electric round outlet boxes installed to a wall.

Do you have EU size frames or e a 3d model of the metal frame, I would make it smaller and print it on a 3d printer?

Thank you in advance!

   

Hello engineer

We need  to restart the kc868-server daily  at an exact time to save fresh system 

So How can we do that in Home Assistant?