PLC Sub-Device Connectivity

Power Line Communication (PLC) sub-device connectivity is designed to help you easily develop PLC gateways. Tuya’s hardware and software-integrated solution provides PLC module and software implementation, allowing you to build a PLC gateway with no code and connect to PLC sub-devices in the Tuya ecosystem.

This topic describes how to use the PLC features with the TuyaOS Gateway Development Framework.

Background information

Developing a PLC gateway has a high barrier to entry and a long development cycle. Tuya’s hardware and software-integrated solution makes complicated gateway development simple. Even if you do not have any PLC knowledge, you can build a PLC gateway cost-effectively.

Connect your hardware to Tuya’s PLC module through the serial port and enable PLC features in the software. Then, your product becomes PLC-capable and can connect to Tuya-enabled sub-devices.

Development guide

This section describes how to enable PLC features with the TuyaOS Gateway Development Framework by making API calls.

Two interfaces are used to enable PLC features: PLC initialization tuya_plc_svc_init and PLC startup tuya_plc_svc_start. They have the same parameters in JSON used for configurations.

Configuration description

Fields in the JSON data:

Example

// ...
#include "user_plc_svc.h"
int main(int argc, char **argv)
{
	ty_cJSON *app_cfg = ty_cJSON_CreateObject();
    if (app_cfg == NULL) {
        return OPRT_CJSON_GET_ERR;
    }
    ty_cJSON_AddStringToObject(app_cfg, "storage_path", "./");
    ty_cJSON_AddStringToObject(app_cfg, "cache_path", "/tmp/");

    // Set a storage path
    TUYA_CALL_ERR_RETURN(tuya_set_config(app_cfg));

    ty_cJSON *plc_cfg = ty_cJSON_CreateObject();
    if (plc_cfg == NULL) {
        return OPRT_CJSON_GET_ERR;
    }
    ty_cJSON_AddStringToObject(plc_cfg, "dev_name", "/dev/ttyS2");
    ty_cJSON_AddNumberToObject(plc_cfg, "cts", 1);
    ty_cJSON_AddNumberToObject(plc_cfg, "baud_rate", 921600);

    // Initialize the PLC service
    TUYA_CALL_ERR_RETURN(tuya_plc_svc_init(plc_cfg));

    // Start the PLC service
    TUYA_CALL_ERR_RETURN(tuya_plc_svc_start(plc_cfg));

    // ...

    return 0;
}