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This document describes the AirLink Telemetry Protocol (ATP) 2.1 transport layer data format. This document provides details on the data format used for collecting vehicle telemetry data from supported AirLink gateways and routers. It is anticipated that ATP can be transported over different transport layers, depending on the requirements of the user. The current implementations of ATP (in the AVTA 1.1 AAF application) uses JSON over MQTT, so as to be compatible with AirLink Management Service (ALMS).
This release separates the protocol naming from the application naming. ATP 2.1 formalizes the protocol apart from the application, meaning that AVTA 1.1 uses ATP 2.1. For clarity and future reference, the data format used by AVTA 1.0 should be considered ATP 1.0.