Disclosed in an embodiment of the present application are a data transmission method and apparatus, a storage medium, a chip and a related device. The method is applicable to a sending end device. The sending end device uses an information frame to communicate with a receiving end device, wherein the information frame comprises a transport block, and the time-domain position of the transport block corresponds to a bit of a data stream. The method comprises: according to a bit value of the data stream, determining sending power that corresponds to the transport block in the information frame; according to the determined sending power, sending a data signal of the transport block, so that according to a received signal strength indicator (RSSI) that corresponds to the data signal, the receiving end device determines the bit value of the data stream. By using the present invention, data transmission between a receiving end device and a sending end device can be implemented on an existing hardware structure, which enables low speed communication between terminals and reduces hardware costs.