Engineering Scope
The development of low-power wireless door and window sensors is oriented to the usage requirement of "door and window opening and closing need to trigger linkage in time", and the collection, processing, communication and power supply are designed as one set of products. The project can start from new main board development, existing firmware modification or designated module integration. The development scope is confirmed based on the target function, existing foundation and delivery requirements.
Interfaces and Product Integration
Develop magnetic or mechanical detection, state wake-up, tamper protection, state synchronization and reconnection recovery.
Power Supply and State Scheduling
Wake up by the opening and closing edges, synchronize the status after debounce, and periodically check the connection with the gateway.
Data and System Integration
Clear connections and data formats around magnetic or mechanical switches, anti-tamper interfaces, and wireless nodes, and define recording, transmission, confirmation, and abnormal states.
Prototypes, Testing and Deliverables
Form a state machine, event messages, low battery prompts and opening and closing cycle records, focusing on verifying the standby detection current, opening and closing event delay, and state consistency after network recovery.
System Architecture and Operation
Wake up by the opening and closing edges, synchronize the status after debounce, and periodically check the connection with the gateway.
- Interface composition: magnetic or mechanical switch, anti-tamper interface, wireless node.
- Work scheduling: Determine each status based on sampling, interaction and reception requirements, indicating which circuits continue to run.
- Exception handling: Define deadlines, bounded retries, and recovery behaviors for applicable communication, sensing, or execution tasks.
Design Conditions and Functional Limits
The magnet distance and installation materials need to be included in the acceptance of the open and closed status.
Define power targets together with functional requirements. Battery-life estimates must specify the battery, temperature, operating cycle, event frequency and network conditions. Keep estimates separate from continuous-operation test results.
Project Inputs
| Data category | Startup data |
|---|---|
| business work cycle | The opening and closing of doors and windows needs to trigger linkage in time; provide typical usage procedures, sampling and upload times, target battery life and response requirements. |
| Product interface and structure | Magnetic or mechanical switches, anti-tamper interfaces, wireless nodes; for existing products, provide schematics, a bill of materials (BOM), firmware and prototypes. |
| Batteries and site conditions | Provide battery model, power supply range, cut-off voltage, temperature, installation method and communication conditions. |
| Delivery and Responsibility | Clarify the scope of source code and design files, platform docking, number of prototypes, test conditions and third-party work. |
Delivery and Acceptance
| Delivery project | Verification method |
|---|---|
| Design and implementation | State machines, event messages, low battery prompts and opening and closing cycle records; the scope of hardware, source code and third-party components are clearly stated in the statement of work. |
| Functional verification | Wake up on the opening and closing edges, synchronize the status after debounce, periodically check the connection with the gateway; record the input, output and recovery results of each status. |
| Power consumption verification | Standby detection current, switching event delay, and state consistency after network recovery. Fix the battery side measurement point to record the energy from the full task cycle until the device returns to sleep. |
| Exceptions and retesting | Covers applicable situations such as low battery, continuous triggering, loss of connection or restart, and retains original logs, waveforms and versions. |
Specialist Engineering Services
Select the required modules based on the existing product. Interfaces and responsibilities are defined in the project scope.
Low-Leakage Hardware and PCB Development
Low-leakage hardware and PCB development services, checking static paths, protection devices, level translation and device quiescent current, delivering schematics, PCB source files, BOM, manufacturing files and node current records. The scope of the project is determined based on the target equipment, existing data and acceptance conditions.
Explore the ScopeSpecialist EngineeringMCU Sleep and Wake-Up Firmware Development
MCU Sleep wake-up firmware development service, develops sleep entry conditions, wake-up determination, clock recovery and driver reconstruction, and delivers state machine, firmware, wake-up timing and function regression records. The scope of the project is determined based on the target equipment, existing data and acceptance conditions.
Explore the ScopeSpecialist EngineeringLow-Power State Machine and Fault Recovery Development
Low-power state machine and exception recovery development services, design failure exit, bounded retry, persistence and restart recovery, delivery of state diagrams, code, configuration and fault injection records. The scope of the project is determined based on the target equipment, existing data and acceptance conditions.
Explore the ScopeSpecialist EngineeringThread/Zigbee Sleepy End Device Development
Thread/Zigbee dormant terminal development service, develops dormant terminal polling, message reception, network drop detection and rejoining, and delivers node firmware, network configuration, gateway dependency and timing records. The scope of the project is determined based on the target equipment, existing data and acceptance conditions.
Explore the ScopeSpecialist EngineeringSystem Power, Battery Life and Environmental Validation
Complete machine power consumption, battery life and environmental verification services, measuring state current, event energy, peak voltage drop and long-term business operation, delivering original waveforms, logs, calculation sheets, test reports and coverage. The scope of the project is determined based on the target equipment, existing data and acceptance conditions.
Explore the ScopeFrequently Asked Questions
How to avoid displaying wrong door and window status after the network is restored?+
The node should report the current status and event identification, and the platform processes historical events in chronological order; the status should be synchronized after the connection is restored instead of just re-issuing an old alarm.
Is it possible to develop only part of an existing product?+
Module development or power consumption optimization can be carried out according to the existing interface and modifiable range. For this product, you first need to check the magnetic or mechanical switches, anti-tamper interfaces, and wireless nodes, and then determine the scope of changes and regressions.
How to determine the cost and period of this project?+
The evaluation is split based on deliverables such as state machines, event messages, low battery prompts, and opening and closing cycle records; the prototype materials, structure, platform, external tests, and new functions are listed separately, and quotations and nodes are formed after the requirements and interfaces are confirmed.
Engineering References
The configuration of GPIO should be checked together with the external circuit, sleep mode and wake-up status; the actual parameters are subject to the target chip data and the whole board test. GPIO and power state design reference
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