Development Scope
Device and interface access
Connect audio output and power amplifier status, define audio format, grouping, task priority, timing strategy and playback result feedback.
Product business functions
Develop audio reception, cache playback, group tasks, priority, scheduled playback and playback result feedback.
Platform and data connection
Combined with the business link of on-site events or broadcast tasks → local status processing → 4G → enterprise platform → acknowledgment and response records, the device identity, data fields, update time, abnormal status and result confirmation method are defined.
Exception handling and operational constraints
There are separate acknowledgments for task delivery, start of playback, and playback completion; the network and storage conditions for real-time audio and pre-downloaded playback are different.
Data and Operational Workflow
Platform publishes tasks → 4G receives audio or stream → local buffering and scheduling → play → status return.
The device side, communication side and platform side retain necessary status and logs respectively. Project integration testing is checked with actual equipment data and execution results, and network connection status and business completion status are recorded separately.
Project Inputs
- Existing device models, interface and wiring diagrams, licensing agreements, data samples and available codes.
- Business processes and parameters: audio format, grouping, insertion priority and offline playback plan.
- Target location, operator, SIM/APN, power supply, installation method and equipment size.
- Existing platform interfaces, user roles, development modules, number of prototypes and planned nodes.
Deliverables and Acceptance
| Deliverables | Delivery content | Verification method |
|---|---|---|
| product realization | Hardware design data, prototypes or existing equipment modification data involved in the project, as well as corresponding firmware and interfaces | Check grouping, volume and scheduled playback. |
| Business integration testing | Data fields, status definitions, platform adaptation procedures and business integration testing records | Verify high-priority insertion and recovery rules. |
| Version and test data | Target hardware and software versions, build or deployment instructions, parameter configurations and test logs | Test disconnection, damaged files and amplifier failure status. |
First confirm the scope and key functions, then complete prototype or software development, system integration testing and stage acceptance. The acceptance conditions list the prototype, version, environment, duration and passing threshold; source code, design documents, third-party licenses, materials, traffic, cloud resources and on-site work are agreed separately.
Frequently Asked Questions
Can I play preset content when the network is unstable?+
Downloaded audio and local plans can be saved in the terminal and executed offline as agreed. It is necessary to define the plan validity period, update confirmation, storage capacity and task processing after network recovery.
Is it possible to delegate only part of the functions of the IP public address terminal?+
The device interface, terminal program, 4G communication and platform integration testing can be split based on the existing R&D foundation. Please provide existing information and target boundaries, first check "audio format, grouping, insertion priority and offline playback plan", and then clarify the deliverables and interface responsibilities of each module.
How are costs and cycle time assessed?+
Split the workload based on target devices, interfaces, existing data, and verification criteria. This project focuses on checking the audio format, grouping, insertion priority and offline playback plan; when prototypes, on-site integration testing or third-party platform cooperation are required, the corresponding costs, prerequisites and nodes will be listed separately.
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