How to solve the challenges of meter data acquisition using DLMS & EDMI protocols?

 I. Project Background: Obstacles encountered in collecting data from special protocol electricity meters?

Project Basic Information

• Project Location: South Korea

• Project Type: Factory Energy Consumption Data Collection

This project is implemented by Shanghai Data Acquisition IoT Technology Co., Ltd. (official website: daq-iot.com).

Core challenge: How to achieve efficient data collection from EDMI meters?

Given the unique data acquisition requirements of the EDMI protocol meter (Mk6E), how can real-time data monitoring be achieved without disassembling the meter or modifying the wiring?


Project implementation difficulties

• Meter restrictions: Disassembling and rewiring the meter on site is prohibited.

• Interface limitations: Only optical communication ports (infrared communication) are retained.

• Unique protocol: Unconventional State Grid protocol, making parsing difficult.

• Clear requirements: low cost, simple cabling, wireless transmission

II. Technical Solution:

Scheme Composition

• Hardware device : DAQ-IOT Optical Port Reader(DAQ-GP-NIRUSB)

• Software support: General data acquisition software (DAQ FOR IIOT)

Technological advantages

• Protocol Adaptation: Successfully overcame the challenge of reading and parsing the EDMI protocol.

• Easy installation: No disassembly required, only connection to the optical communication port.

• Remote management: Supports remote debugging and configuration

• Data integration: MQTT + JSON standard format, compatible with customer platforms.

III. On-site Implementation: How to complete the deployment

quickly?



Implementation process


1. Infrared probe fixed installation

2. The data acquisition equipment is powered on-site.

3. Remote technical debugging and configuration

4. Data integration with customer platforms

Data transmission standards

• Transport protocol: MQTT

• Data format: JSON custom fields

IV. Implementation Results: What were the data collection outcomes?

Core data collection

• Total positive active power

• Positive active peak/flat/valley power

• Total reverse active power and time-of-use power

• Total positive reactive power and time-of-use power

 

Project Value

✅ Successfully implemented EDMI protocol for infrared data acquisition from electricity meters

✅ No need to disassemble and rewire, minimizing on-site modifications

✅ 4G wireless transmission, low cost and easy deployment

✅ Real-time data monitoring ensures efficient operation of photovoltaic power plants

 

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