Needed help on editing json board file

1

Hello, I am using kincony kc868-a16-v3.1 and I cant use gpio properly, need help in configuring new json for this board

2

Can you upload your current PlatformIO project? We would need to see what board definition and code you have, what pins you’re trying to access, and what behavior you’re getting.

3

platformio.ini

[env:kc868-A16]
platform = espressif32
board = esp32-s3-devkitc-1
framework = espidf
upload_port = COM10
upload_speed = 115200
monitor_port = COM10
monitor_speed = 115200

#include <cstdio>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "esp_timer.h"

constexpr gpio_num_t WIEGAND_D0_GPIO = GPIO_NUM_3;  
constexpr gpio_num_t WIEGAND_D1_GPIO = GPIO_NUM_4;

extern "C" void app_main(void) {

    while (1) {
        printf("D0: %d, D1: %d\\n", 
               gpio_get_level(WIEGAND_D0_GPIO),
               gpio_get_level(WIEGAND_D1_GPIO));
        vTaskDelay(pdMS_TO_TICKS(1000));
    }
}

I am trying to access 1 and 2 input pins

4

But according to https://www.kincony.com/esp32-board-16-channel-relay-hardware.html, the “D0” and “D1” etc. I/O pins of the board are connected to two PCF8574P I²C GPIO expander chips (each giving 8 pins), so they’re not directly accessible like that. You have to use the I²C communication to control those pins. IO3 and IO4 of the ESP32 are UART0 RX and I²C SDA. IO5 would the I²C SCL. Also, it says it’s using a “ESP-WROOM-32”, so a regular ESP32, not a ESP32S3.

Schematics:

According to

grafik
grafik1173×782 122 KB

You can see that the expcted I2C address suffic of the port expanders are (A2, A1, A0) = (0,1,0) [aka 0x02) and (1,0,0). [aka 0x04]), the prefix coming from the datasheet

grafik
grafik1125×228 9.17 KB

Woudl result in the 7-bit address of the input expander as 0x22 and of the output expander as 0x24.

Why don’t you try a much simpler Arduino firmware that has a premade library for the GPIO expander to see if you can get any LED blinking at all from the expander connected to the output pins?

[env:kc868-A16]
platform = espressif32@6.12.0
board = esp32dev
framework = arduino
monitor_speed = 115200
lib_deps = 
  robtillaart/PCF8574@^0.4.4

with src/main.cpp

#include <Arduino.h>
#include "PCF8574.h"

PCF8574 PCF_Input(0x22);
PCF8574 PCF_Output(0x24);

static uint8_t outputState = 0x00;

void setup() {
  Serial.begin(115200);
  Serial.println(__FILE__);
  Serial.print("PCF8574_LIB_VERSION:\t");
  Serial.println(PCF8574_LIB_VERSION);

  Wire.begin(4, 5);

  if(!PCF_Input.begin()) {
    Serial.println("PCF_Input failed to initialize!");
    while (1);
  }
  if(!PCF_Output.begin()) {
    Serial.println("PCF_Output failed to initialize!");
    while (1);
  }
}

void loop() {
    // read all 8 inputs of input PCF
    uint8_t inputState = PCF_Input.read8();
    Serial.print("Input State: 0b");
    // write in binary with leading zeros
    for(int i = 7; i >= 0; i--) {
      Serial.print((inputState & (1 << i)) ? '1' : '0');
    }
    Serial.println();
    // toggle all outputs of periodically
    outputState = ~outputState;
    PCF_Output.write8(outputState);
    Serial.print("Output State set to: 0b");
    Serial.println(outputState, BIN);
    delay(1000);
}