Chain Encoder Tutorial

#include "M5Chain.h"

#define RXD_PIN GPIO_NUM_5  // 47 for the other side of Chain DualKey
#define TXD_PIN GPIO_NUM_6  // 48 for the other side of Chain DualKey

Chain M5Chain;

device_list_t *device_list = NULL;
uint16_t device_count = 0;
uint8_t opr_status = 0;

int16_t encoder_value;
int16_t encoder_incre;
uint8_t button_status;
chain_button_press_type_t button_press_type;

void setup() {
  Serial.begin(115200);
  delay(1000);
  Serial.println("===========================");
  Serial.println("M5Stack Chain Encoder Test");

  M5Chain.begin(&Serial2, 115200, RXD_PIN, TXD_PIN);
  while (!M5Chain.isDeviceConnected()) {
    Serial.println("No device connected");
    delay(1000);
  }

  M5Chain.getDeviceNum(&device_count);
  device_list = (device_list_t *)malloc(sizeof(device_list_t));
  device_list->count = device_count;
  device_list->devices = (device_info_t *)malloc(sizeof(device_info_t) * device_count);
  M5Chain.getDeviceList(device_list);

  if (device_list->devices[0].device_type == CHAIN_ENCODER_TYPE_CODE) {
    Serial.println("ID[1] is Chain Encoder\n");
    delay(1000);
  } else {
    Serial.println("ID[1] is NOT Chain Encoder\n");
    return;
  }

  // Device ID, double click interval (100MS/200MS/.../900MS/1000MS), long press interval (3S/4S/.../9S/10S), operation status pointer
  M5Chain.setEncoderButtonTriggerInterval(1, BUTTON_DOUBLE_CLICK_TIME_500MS, BUTTON_LONG_PRESS_TIME_5S, &opr_status);
  Serial.println("Set double and long press intervals");

  // Device ID, increment direction (AB = clockwise, BA = counterclockwise), operation status pointer
  M5Chain.setEncoderABDirect(1, ENCODER_AB, &opr_status);
  Serial.println("Set increment direction\n");

  delay(1000);
}

void loop() {
  M5Chain.getEncoderValue(1, &encoder_value);  // Device ID
  Serial.print("encoder_value:");
  Serial.println(encoder_value);

  M5Chain.getEncoderIncValue(1, &encoder_incre);  // Device ID
  Serial.print("encoder_incre:");
  Serial.println(encoder_incre);

  M5Chain.getEncoderButtonStatus(1, &button_status);  // Device ID
  Serial.print("button_status:");
  Serial.println(button_status);

  while (M5Chain.getEncoderButtonPressStatus(1, &button_press_type)) {  // Device ID
    switch (button_press_type) {
      case CHAIN_BUTTON_PRESS_SINGLE:
        Serial.println("Single pressed");
        M5Chain.resetEncoderValue(1, &opr_status);  // Device ID
        break;
      case CHAIN_BUTTON_PRESS_DOUBLE:
        Serial.println("Double pressed");
        break;
      case CHAIN_BUTTON_PRESS_LONG:
        Serial.println("Long pressed");
        break;
    }
  }
}