KC868-A8S ESP32 I/O pin define

[admin]

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

IIC SDA:4
IIC SCL:5

Relay_IIC_address 0x24

Input_IIC_address 0x22

DS18B20/DHT11/DHT21/LED strip -2: 14

RF433MHz wireless receiver: 16


Ethernet (LAN8720) I/O define:

#define ETH_ADDR        0
#define ETH_POWER_PIN  -1
#define ETH_MDC_PIN    23
#define ETH_MDIO_PIN  18
#define ETH_TYPE      ETH_PHY_LAN8720
#define ETH_CLK_MODE  ETH_CLOCK_GPIO17_OUT


RS485:
RXD:GPIO32
TXD:GPIO33

GSM:
RXD:GPIO13
TXD:GPIO15

Buzzer:GPIO2

WS2812B RGBW LED:GPIO12

[Auxinne Paul]

Hello all, am planning to buy this board and connect to blynk cloud with it using simcard cellular data. please if you guys have a sample code to help me with it. also could you please define pins for the relays

[admin]

hello, i have not tried use blynk, you can try. the relay control by PCF8574 IIC extender chip.

[alsubhi]

What about the relays? There are no pins associated with them in KC868-A8S. How to control them?

[admin]

do you have seen "Relay_IIC_address 0x24" ?
KC868-A8S relay output and digital input all use by PCF8574 I2C chip. just you know the address, then can use all relay. we have arduino demo source code how to use it.

[Oscar Daza]

I'm trying to use the Digital Output but it doesn't work for the sensor HC-SR04 that I'm using.
I already tried to declarate the Digital Output through the IIC gpio expander PCF8074 with the adress 0x22 but it doesn't work.
I'm working with KC868-A8S.

This is the normal code for the HC-SR04:


const int Trigger = 2;  //Pin digital 2 para el Trigger del sensor
const int Echo = 3;  //Pin digital 3 para el Echo del sensor

void setup() {
  Serial.begin(9600);//iniciailzamos la comunicación
  pinMode(Trigger, OUTPUT); //pin como salida
  pinMode(Echo, INPUT);  //pin como entrada
  digitalWrite(Trigger, LOW);//Inicializamos el pin con 0
}

void loop()
{

  long t; //timepo que demora en llegar el eco
  long d; //distancia en centimetros

  digitalWrite(Trigger, HIGH);
  delayMicroseconds(10);          //Enviamos un pulso de 10us
  digitalWrite(Trigger, LOW);
 
  t = pulseIn(Echo, HIGH); //obtenemos el ancho del pulso
  d = t/59;            //escalamos el tiempo a una distancia en cm
 
  Serial.print("Distancia: ");
  Serial.print(d);      //Enviamos serialmente el valor de la distancia
  Serial.print("cm");
  Serial.println();
  delay(100);          //Hacemos una pausa de 100ms
}