Practice on smart multi-color product by using Tuya sandwich borad, Arduino, and Wi_Fi solution

The following picture shows the layout of a ST Nucleo board.

• Button: Press and hold the button for network configuration.
• The black button next to the indicator: The reset port of the development board.
• USB: The port where you can download programs.

The following picture shows the layout of a Tuya sandwich lighting board.

The following picture shows the layout of a Tuya Sandwich Wi-Fi board.

The following picture shows the layout of a connected module. From the top to bottom, you can see Tuya sandwich lighting board, ST Nucleo, Tuya Sandwich Wi-Fi board

Note: In order to prevent the development board from constantly restarting after the download is completed due to insufficient USB power supply of the computer, it is recommended that you use an independent power board to supply power. Alternatively, you can remove the RGB board during download and connect it after download is complete.

You must focus on three functions: setup (), loop (), and dp_download_handle ().

• The setup () function performs initialization content, it is executed only once.

void setup () {
  pinMode (PC13, INPUT); // Initialization of network configuration
  mySerial.begin (9600); // Software serial port initialization
  mySerial.println ("myserial init successfully!");
  Serial.begin (115200); // PA3 RX PA2 TX
  Serial.println ("serial init successfully! \ R \ n");
  light_data_int (); // Initialization of RGB cold and warm lights
  IIC_Init (); // IIC initialization is used to drive RGB lights
  delay (10);
  rgb_init (0, 0, 0);
  wifi_protocol_init (); // Protocol serial port initialization function
  timer_init (); // Timer initialization
  Hue_shade_start (& a);
}

• The loop () function repeats through the contents of the function body.

void loop () {
  if (init_flag == 0) {
    time_cnt ++;
    if (time_cnt% 6000 == 0) {
      time_cnt = 0;
      cnt ++;
    }
    wifi_stat_led (& cnt); // Wi-Fi status processing
  }
  wifi_uart_service (); // Wi-Fi serial port processing service
  myserialEvent (); // Serial port receiving processing
  key_scan (); // The button for network reset detection
}

/ ************************************************* ****************************
  Function Name: dp_download_handle
  Function description: dp release processing function
  Input parameters: dpid: DP
           value: dp data buffer address
           length: dp data length
  Return parameter: Success return: SUCCESS / Failure return: ERRO
  Instructions for use: This function cannot be modified by the user
********************************************** *************************** /
unsigned char dp_download_handle (unsigned char dpid, const unsigned char value [], unsigned short length)
{
  / *********************************
    Current function processing can be issued / reportable data call
    The specific function needs to implement the issued data processing
    To complete the application, the processing result needs to be fed back to the APP.Otherwise, the APP will consider that the delivery fails.
  *********************************** /
  unsigned char ret;
  printf ("dpid =% d \ r \ n", dpid);
  switch (dpid)
  {
    case DPID_SWITCH_LED:
      // Switch processing function
      ret = dp_download_switch_led_handle (value, length);
      break;
    case DPID_WORK_MODE:
      // Pattern processing function
      ret = dp_download_work_mode_handle (value, length);
      break;
    case DPID_BRIGHT_VALUE:
      // White light brightness processing function
      ret = dp_download_bright_value_handle (value, length);
      break;
    case DPID_TEMP_VALUE:
      // White light color temperature processing function
      ret = dp_download_temp_value_handle (value, length);
      break;
    case DPID_COLOUR_DATA:
      // Color light color processing function
      ret = dp_download_colour_data_handle (value, length);
      break;
    case DPID_CONTROL_DATA:
      // Adjust processing function
      ret = dp_download_control_data_handle (value, length);
      break;

    default:
      break;
  }
  return ret;
}

• The dp_download_handle () processes DP data issued by the cloud, you should implement the corresponding functions according to the corresponding DP release.

The following code sample call several APIs to implementc capabilities listed in the preceding table.

/ ************************************************* ****************************
  Function Name: dp_download_handle
  Function description: dp release processing function
  Input parameters: dpid: DP
           value: dp data buffer address
           length: dp data length
  Return parameter: Success return: SUCCESS / Failure return: ERRO
  Instructions for use: This function cannot be modified by the user
********************************************** *************************** /
unsigned char dp_download_handle (unsigned char dpid, const unsigned char value [], unsigned short length)
{
  / *********************************
    Current function processing can be issued / reportable data call
    The specific function needs to implement the issued data processing
    To complete the application, the processing result needs to be fed back to the APP.Otherwise, the APP will consider that the delivery fails.
  *********************************** /
  unsigned char ret;
  printf ("dpid =% d \ r \ n", dpid);
  switch (dpid)
  {
    case DPID_SWITCH_LED:
      // Switch processing function
      ret = dp_download_switch_led_handle (value, length);
      break;
    case DPID_WORK_MODE:
      // Pattern processing function
      ret = dp_download_work_mode_handle (value, length);
      break;
    case DPID_BRIGHT_VALUE:
      // White light brightness processing function
      ret = dp_download_bright_value_handle (value, length);
      break;
    case DPID_TEMP_VALUE:
      // White light color temperature processing function
      ret = dp_download_temp_value_handle (value, length);
      break;
    case DPID_COLOUR_DATA:
      // Color light color processing function
      ret = dp_download_colour_data_handle (value, length);
      break;
    case DPID_CONTROL_DATA:
      // Adjust processing function
      ret = dp_download_control_data_handle (value, length);
      break;

    default:
      break;
  }
  return ret;
}

Note: The color data sent from the cloud is in HSV format. You must convert it to RGB format and modify the RGB data to get the correct RGB value for display.

Several important APIs for RGB dimming used in the preceding code snippets are as follows.

The Tuya Sandwich development board is programmed by calling Arduino standard API. For detailed instruction on Arduino-API usage, visit Arduino Reference.

You can also find user guide and code samples under File > Sample within the ArduinoIDE.