In the commercial and residential electricity metering, operation and maintenance domain, the traditional manual meter reading workflow has long been plagued by persistent operational pain points. The N720 edge data acquisition gateway, built on the Power HarmonyOS ecosystem, eliminates core on-site operational challenges for field meter reading teams through lightweight network retrofitting, enabling full-scenario remote automated meter reading deployment.

1. Core Field Pain Points of Legacy Commercial & Residential Meter Reading
For decades, meter reading technicians have faced a set of inherent operational bottlenecks that cannot be resolved through manual process optimization alone:

1.1 Severe Labor Productivity Imbalance
Field O&M personnel are required to conduct door-to-door visits and access high-rise units. In scenarios where residents are absent for extended periods or meters are installed in sealed utility shafts, repeated site visits are unavoidable. A full-cycle meter reading campaign for a mid-sized residential community typically requires multiple technicians several days to complete, driving steadily rising labor costs with no meaningful improvement in operational efficiency.

1.2 Billing Disputes Driven by Data Inaccuracy
The legacy workflow of visual meter reading and paper-based manual logging inherently introduces human errors including misreading, transcription mistakes, and estimated billing. These inaccuracies frequently trigger customer queries and formal complaints during subsequent billing reconciliation, forcing O&M teams to allocate excessive resources to post-processing tasks such as account verification and customer communication, creating substantial unnecessary workload.

1.3 Data Latency Prevents Granular Asset Management
Traditional monthly/quarterly meter reading cycles cannot deliver real-time electricity consumption visibility. Issues such as line leakage, meter faults, and unauthorized abnormal electricity usage often go undetected for extended periods, resulting in prolonged energy waste and avoidable financial losses, while failing to provide continuous, high-precision datasets required for advanced energy analytics.

1.4 Safety Risks in Complex Deployment Environments
On-site meter reading in high-rise residential towers, unmanned commercial buildings, and underutilized industrial parks presents significant access barriers. Certain live electrical meter installation environments introduce inherent occupational safety hazards, making it practically impossible for manual operations to achieve 100% coverage across all endpoints.

2. Full-Scenario Optimized Remote Meter Reading Networking Architecture
This solution eliminates the requirement for large-scale replacement of existing metering assets. Using the IoT Edge Gateway N720 as the core network node, a full-coverage meter reading network can be rapidly deployed:

For legacy RS485 electricity meters, direct data acquisition is achieved via serial port connection to the N720 gateway.
For legacy infrared-enabled meters, an infrared meter reader is deployed to complete infrared-to-RS485 protocol conversion, enabling seamless data integration without replacing existing metering hardware.
Supporting current transformers synchronously capture real-time line electricity operation data, while DIN rail power supplies deliver stable industrial-grade power input for the gateway.

All metering data distributed across residential and commercial buildings is centrally aggregated to the N720 Power HarmonyOS DTU deployed in the local power distribution room. After on-site preprocessing, validated data is securely transmitted to the cloud management platform, delivering a fully lightweight end-to-end meter reading deployment.

3. N720 Edge Data Acquisition Gateway: Targeted Resolution of Core Meter Reading Challenges
As a purpose-built industrial IoT edge gateway under the Power HarmonyOS ecosystem, the N720 is engineered at the hardware and firmware level to meet all operational requirements of utility metering use cases, fully replacing legacy manual on-site workflows:

3.1 Native Protocol Compatibility for Seamless Legacy Meter Integration
The gateway natively supports the widely adopted DL/T645-2007 electricity metering protocol, eliminating the need for additional external protocol converters. It delivers out-of-the-box interoperability with the vast majority of commercial RS485 meters and infrared-converted metering endpoints, supporting direct integration with legacy meters across decades-old residential communities and newly constructed commercial facilities, drastically reducing retrofitting barriers and total cost of ownership.

3.2 Local Edge Processing Minimizes Cloud Infrastructure Overhead
The gateway integrates embedded edge computing logic, executing on-site threshold validation, data aggregation, and non-critical data filtering. Only validated, actionable electricity consumption data is uploaded to the cloud platform, reducing cellular/WAN data transmission costs and preventing redundant datasets from consuming unnecessary cloud computing resources, significantly improving end-to-end meter reading data processing efficiency.

3.4 Industrial-Grade Reliability for Harsh Field Environments
The gateway features industrial-grade, vibration-resistant, lockable interfaces, designed for long-term stable operation in high-electromagnetic-interference environments such as power distribution rooms and sealed utility shafts. O&M teams no longer require frequent on-site device troubleshooting. The full-coverage meter reading and validation workflow that previously required multiple field technicians can now be completed by a single operator via the cloud management platform, delivering over 90% improvement in overall operational efficiency and fundamentally eliminating all core pain points of legacy manual meter reading operations.

This solution requires no disruptive large-scale construction work, enabling rapid deployment across all commercial and residential metering use cases. While guaranteeing metering data accuracy and reliability, it delivers tangible cost reduction and efficiency gains for utility metering operations, positioning it as one of the most cost-effective lightweight retrofitting options available for current power metering digital transformation initiatives.