Engineering Scope
The low-power cold chain temperature and humidity recorder was developed to meet the usage requirement of "cold chain transportation needs to record the temperature and read it during handover". 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 probe acquisition, time stamping, over-limit logging, storage, Bluetooth or cellular data transfer and batch correlation.
Power Supply and State Scheduling
Periodic records during transportation, marking when limits are exceeded; batch reading during handover or real-time reporting as needed.
Data and System Integration
Clarify the connection and data format around the temperature or temperature and humidity probe, RTC, non-volatile storage, and read interface, and define recording, transmission, confirmation, and abnormal status.
Prototypes, Testing and Deliverables
The recording firmware, transportation batch model, report export interface and low-temperature data record are formed, focusing on verifying the low-temperature capacity and pressure drop, record integrity, and power consumption in two modes of reading and real-time reporting.
System Architecture and Operation
Periodic records during transportation, marking when limits are exceeded; batch reading during handover or real-time reporting as needed.
- Interface composition: temperature or temperature and humidity probe, RTC, non-volatile storage, reading interface.
- 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 available capacity, storage reliability and temperature accuracy of low-temperature batteries were tested separately.
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 | Cold chain transportation requires recording temperatures and reading them during handover; providing typical usage procedures, sampling and upload times, target battery life, and response requirements. |
| Product interface and structure | Temperature or temperature and humidity probe, RTC, non-volatile storage, reading interface; 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 | Document firmware, shipping batch model, report export interface and low temperature data recording; the scope of hardware, source code and third-party components is specified in the statement of work. |
| Functional verification | Periodic records during transportation, marking when limits are exceeded; batch reading during handover or real-time reporting as needed; recording the input, output and recovery results of each status. |
| Power consumption verification | Low temperature capacity and pressure drop, record integrity, power consumption in two modes of reading and real-time reporting. 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.
Battery Power, Charging and State-of-Charge Management
Battery power supply, charging and power management development services, design conversion, charging and protection, determine power estimation and low battery threshold, deliver power circuit, parameter configuration, status interface and load test records. The scope of the project is determined based on the target equipment, existing data and acceptance conditions.
Explore the ScopeSpecialist EngineeringLow-Power Sensor Acquisition Driver Development
Sensor low-power acquisition driver development service, develop single measurement, FIFO, interrupt and power supply control, retain the necessary stabilization time, and deliver driver source code, parameter description, sampling record and exception handling. 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 EngineeringLow-Power BLE Advertising and Connection Development
BLE broadcast and connection low-power development services, configure broadcast and connection parameters according to status, manage synchronization and disconnection recovery, and deliver BLE firmware, protocol fields, parameter tables and target device 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
Can complete transportation records be retained after using Bluetooth reading?+
Allocate storage according to transportation time and sampling period, record serial number, timestamp and verification; even if reading is interrupted, it should be possible to confirm the received range and continue reading.
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 temperature or temperature and humidity probe, RTC, non-volatile storage, and read interface, and then determine the change and regression testing scope.
How to determine the cost and period of this project?+
The evaluation is split based on deliverables such as recording firmware, transportation batch model, report export interface, and low-temperature data recording; the prototype materials, structure, platform, external testing, and new functions are listed separately, and quotations and nodes are formed after the requirements and interfaces are confirmed.
Engineering References
The power saving mode needs to check the network grant and the actual entry state, and the network search and retry under weak coverage should be measured separately. Cellular Power Consumption Analysis Reference
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