这是我之前在设备端使用 IoT DevKit (=Mxchip) 的一些示例:
static int DeviceMethodCallback(const char *methodName, const unsigned char *payload, int size, unsigned char **response, int *response_size)
{
LogInfo("Try to invoke method %s", methodName);
const char *responseMessage = "\"Successfully invoke device method\"";
int result = 200;
if (strcmp(methodName, "start") == 0)
{
DoSomething();
}
else if (strcmp(methodName, "stop") == 0)
{
DoSomethingElse();
}
else
{
LogInfo("No method %s found", methodName);
responseMessage = "\"No method found\"";
result = 404;
}
*response_size = strlen(responseMessage) + 1;
*response = (unsigned char *)strdup(responseMessage);
return result;
}
DevKitMQTTClient_SetDeviceMethodCallback(DeviceMethodCallback);
在服务端(您执行方法调用的地方)这里是一些 C# 示例
ServiceClient _iothubServiceClient = ServiceClient.CreateFromConnectionString(config["iothubowner_cs"]);
var result = await _iothubServiceClient.InvokeDeviceMethodAsync(deviceid, "start");
var status = result.Status;