| CPC H04L 67/12 (2013.01) [H04L 69/18 (2013.01)] | 12 Claims |

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1. A data transmission method, wherein the method comprises:
sending, by an application running on a second controller, a first data request to a client running on the second controller;
receiving, by a server running on a first controller, a data obtaining request from the second controller, wherein the data obtaining request requests to obtain data of a first sensor;
determining, by the first controller, whether the second controller supports a data interface corresponding to the first sensor;
in response to determining that the second controller supports the data interface corresponding to the first sensor, instructing, by the first controller, the second controller to obtain first data of the first sensor through the data interface corresponding to the first sensor; and
in response to determining that the second controller does not support the data interface corresponding to the first sensor,
receiving, by the first controller, first data from the first sensor; and
sending, by the first controller, converted first data to the second controller according to a first communication protocol.
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