I also noticed sometimes UART is disabled in kernel. The enable it you need to check in /boot/config.txt the line enable_uart

If it's set to 0 like follow

enable_uart=0
You need to change to 1 as follow

enable_uart=1
And reboot of course!

sudo raspi-config
   
make sure disable Linux UART console

- platform: mqtt
    name: 'sw1'
    unique_id: sw-1
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW1.on }}'
    payload_on: 1
    payload_off: 0   

  - platform: mqtt
    name: 'sw2'
    unique_id: sw-2
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW2.on }}'
    payload_on: 1
    payload_off: 0
   
  - platform: mqtt
    name: 'sw3'
    unique_id: sw-3
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW3.on }}'
    payload_on: 1
    payload_off: 0   

  - platform: mqtt
    name: 'sw4'
    unique_id: sw-4
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW4.on }}'
    payload_on: 1
    payload_off: 0   
   
  - platform: mqtt
    name: 'sw5'
    unique_id: sw-5
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW5.on }}'
    payload_on: 1
    payload_off: 0   

  - platform: mqtt
    name: 'sw6'
    unique_id: sw-6
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW6.on }}'
    payload_on: 1
    payload_off: 0
   
  - platform: mqtt
    name: 'sw7'
    unique_id: sw-7
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW7.on }}'
    payload_on: 1
    payload_off: 0   

  - platform: mqtt
    name: 'sw8'
    unique_id: sw-8
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW8.on }}'
    payload_on: 1
    payload_off: 0   

  - platform: mqtt
    name: 'sw9'
    unique_id: sw-9
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW9.on }}'
    payload_on: 1
    payload_off: 0   

  - platform: mqtt
    name: 'sw10'
    unique_id: sw-10
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW10.on }}'
    payload_on: 1
    payload_off: 0
   
  - platform: mqtt
    name: 'sw11'
    unique_id: sw-11
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW11.on }}'
    payload_on: 1
    payload_off: 0   

  - platform: mqtt
    name: 'sw12'
    unique_id: sw-12
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW12.on }}'
    payload_on: 1
    payload_off: 0   
   
  - platform: mqtt
    name: 'sw13'
    unique_id: sw-13
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW13.on }}'
    payload_on: 1
    payload_off: 0   

  - platform: mqtt
    name: 'sw14'
    unique_id: sw-14
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW14.on }}'
    payload_on: 1
    payload_off: 0
   
  - platform: mqtt
    name: 'sw15'
    unique_id: sw-15
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW15.on }}'
    payload_on: 1
    payload_off: 0   

  - platform: mqtt
    name: 'sw16'
    unique_id: sw-16
    state_topic: 'server/8ae082ec66f37db231cf2b8f/state'
    value_template: '{{ value_json.SW16.on }}'
    payload_on: 1
    payload_off: 0


  KC868-Server-home-assistant-config-16-channel-DI-mqtt.txt (Size: 3.28 KB / Downloads: 683)

Hi all,

i am pretty new to ESP32 and programming with Arduion IDE. I have purchased a KC868-A8-V1.4 board and now i wanted to do the Realy programming according to the instruction from your site KC868-A8 programming
Correct type of board is selected NodeMCU-32S and the pins in pins_arduino.h are changed to 4 + 5, PCF8574 library V2.3.1 from Renzo Mischianti is installed.
The problem i am facing is that the PCF8574 throws all the time "error" instead of "OK" and therefore the relays are not working.

In order to test whether the board has a hardware problem, I have also tried once the TASMATO accoring to the video Tasmato KC868-A8, this has worked without any problems. So the hardware is ok.

Do you know what i am doing wrong that the PCF8574 throws the error?

Any help would be appreaciated

Used code:

Attached Files

Thumbnail(s)
   

Hello
I have also some problem to receive complete string (I'm ususing ararat synapse library in lazarus)
In your debug software works all ok and I check also with other program and all works correctly, I would know if the received string could contain some special Char because if I send this string   "5E0123C001000000000000000000000000000000000000000000000000000000000000000000000000000000FF" (to read digital input for example) I receiv only this
string   "5E0123C011000000000000000000000000000000000000000000000000000000000000000000000000000000FF"
while the correct (and complete) string should be this "5E0123C011000000000000000000000000000000000000000000000000000000000000000000000000000000FF00000000000000000101010001010101
I don't understand why I don't receive the last part of string (00000000000000000101010001010101)

thank you in advance

   

esphome:
  name: kc868-a6

esp32:
  board: esp32dev
  framework:
    type: arduino

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:
  password: "b9c07c109b7ecc6c63dac976c0c23a12"

wifi:
  ssid: KinCony
  password: xxxxxxxx

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "A6 Fallback Hotspot"
    password: "GLdHSsZr1p96"

captive_portal:


# Example configuration entry for ESP32
i2c:
  sda: 4
  scl: 15
  scan: true
  id: bus_a

# Example configuration entry
pcf8574:
  - id: 'pcf8574_hub_out_1'  # for output channel 1-8
    address: 0x24

  - id: 'pcf8574_hub_in_1'  # for input channel 1-8
    address: 0x22

# Individual outputs
switch:
  - platform: gpio
    name: "a6-light1"
    id: light1
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 0
      mode: OUTPUT
      inverted: true

  - platform: gpio
    name: "a6-light2"
    id: light2
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 1
      mode: OUTPUT
      inverted: true
     
  - platform: gpio
    name: "a6-light3"
    id: light3
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 2
      mode: OUTPUT
      inverted: true
     
  - platform: gpio
    name: "a6-light4"
    id: light4
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 3
      mode: OUTPUT
      inverted: true
     
  - platform: gpio
    name: "a6-light5"
    id: light5
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 4
      mode: OUTPUT
      inverted: true
     
  - platform: gpio
    name: "a6-light6"
    id: light6
    pin:
      pcf8574: pcf8574_hub_out_1
      number: 5
      mode: OUTPUT
      inverted: true
     

binary_sensor:
  - platform: gpio
    name: "a6-input1"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 0
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "a6-input2"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 1
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "a6-input3"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 2
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "a6-input4"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 3
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "a6-input5"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 4
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "a6-input6"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 5
      mode: INPUT
      inverted: true

Attached Files

  KC868-A6_ESPhome.txt (Size: 2.59 KB / Downloads: 2243)

#define ANALOG_A1  36
#define ANALOG_A2  39
#define ANALOG_A3  34
#define ANALOG_A4  35

DS18B20/DHT11/DHT21/LED strip -1: 32
DS18B20/DHT11/DHT21/LED strip -2: 33

DAC1:26
DAC2:25

IIC SDA:4
IIC SCL:15

Input_IIC_address 0x22

Relay_IIC_address 0x24

RS485 RXD: 14
RS485 TXD: 27

SPI_Bus: (For LoRA/nRF24L01)
CS: 5
MOSI: 23
MISO: 19
SCK: 18

LoRA sx1278:
RST:21
DIO0:2

nRF24L01:
CE: 22

RS485:
TXD:27
RXD:14

RS232:
TXD:17
RXD:16

Extend serial port on PCB:
TXD(define by yourself):12
RXD (define by yourself) :13

We have designed KC868-A8S esp32 board, many hardware resource for you to use. it support GSM module for SMS, voice call, GPRS communication. Use SMS or call to turn ON/OFF relay will be very easy for home automation DIY. You can write any code by Arduino IDE to ESP32 wifi/bluetooth/ethernet RS485 module. We will supply demo code for different samples. Everyone can modify and change the code for your own smart home automation system project. it support use by ESPHome for home assistant or tasmota firmware for smart home automation DIY.

This is a demo of curtain motor. this motor support TUYA wifi and RS485 modbus protocol.

Open command

start Motor address function Data address CRC16
Send 55 fe fe 03 01 AD 8A
receive 55 fe fe 03 01 AD 8A

Close command

start Motor address function Data address CRC16
Send 55 fe fe 03 02 ED 8B
receive 55 fe fe 03 02 ED 8B

Set any positon command

start Motor address function Data address value CRC16
Send 55 fe fe 03 04 1E C8 E5
receive 55 Fe fe 03 04 FF* 08 AD


Read current positon command

start Motor address function Data address Data length CRC16
Send 55 fe fe 01 02 01 2B 4D
receive 55 fe fe 01 01 FF* AA 3D

Track range: 0x00—0x64    -  0%--100%

[Arduino IDE demo source code for KC868-A8S]--#10-KC868-A8S_GSM_code

  sim7600-AT-debug.zip (Size: 542 bytes / Downloads: 966)

Attached Files

Thumbnail(s)
   

  sscom32E.zip (Size: 344.42 KB / Downloads: 891)

[Arduino IDE demo source code for KC868-A8S]--#09-KC868-A8S_RS485_code

Attached Files

  rs485.zip (Size: 489 bytes / Downloads: 930)