# Wired vs Wireless meters

### Wireless open standards   


#### Comparison

<table id="bkmrk-protocol-frequency-r"><thead><tr><th>Protocol</th><th>Frequency</th><th>Range</th><th>Data Rate</th><th>Topology</th><th>Power Usage</th></tr></thead><tbody><tr><td>Zigbee</td><td>2.4 GHz, 915/868 MHz</td><td>Short</td><td>Up to 250 kbps</td><td>Mesh, Star</td><td>Very Low</td></tr><tr><td>LoRaWAN</td><td>868/915 MHz</td><td>Long</td><td>0.3–50 kbps</td><td>Star</td><td>Extremely Low</td></tr><tr><td>Wi-SUN</td><td>868/915 MHz</td><td>Medium to Long</td><td>50–300 kbps</td><td>Mesh</td><td>Low to Medium</td></tr><tr><td>Bluetooth LE</td><td>2.4 GHz</td><td>Short</td><td>125 kbps–2 Mbps</td><td>Star, Mesh</td><td>Very Low</td></tr><tr><td>IEEE 802.11ah</td><td>Sub-GHz (~900 MHz)</td><td>Medium</td><td>Up to Mbps</td><td>Star, Tree</td><td>Low</td></tr><tr><td>IEEE 802.15.4</td><td>Various</td><td>Short–Medium</td><td>20–250 kbps</td><td>Mesh, Star</td><td>Very Low</td></tr><tr><td>Thread</td><td>2.4 GHz</td><td>Short</td><td>250 kbps</td><td>Mesh</td><td>Very Low</td></tr></tbody></table>

#### Recommended for Residential Microgrid Applications in Uganda:

- **LoRaWAN**: If covering a large geographical area (kilometers), due to its excellent range, penetration, and low power use.
- **Wi-SUN**: For robust, medium-to-large-scale smart metering networks, especially if a mesh topology is desirable.
- **Zigbee/Thread**: Ideal for dense residential areas where devices (meters) are closer together, benefiting from low power and reliable mesh networking.

### Wired Open standards   


#### Comparison

<table id="bkmrk-protocol-standard-os"><thead><tr><th>Protocol</th><th>Standard</th><th>OSI Layers</th><th>Medium</th><th>Topology</th><th>Range</th><th>Data Rate</th><th>Typical Application Areas</th><th>Remarks</th></tr></thead><tbody><tr><td>**G3-PLC**</td><td>ITU-T G.9903</td><td>Layers 1-2</td><td>Power Lines</td><td>Mesh, Star</td><td>Up to several km</td><td>2.4–35 kbps</td><td>Smart grids, AMI, smart meters</td><td>Robust, designed for noisy environments; supports IPv6, strong security</td></tr><tr><td>**PRIME**</td><td>ITU-T G.9904</td><td>Layers 1-2</td><td>Power Lines</td><td>Mesh, Star</td><td>Up to several km</td><td>21–128 kbps</td><td>Smart metering, distribution automation</td><td>Optimized for higher-speed PLC, widely used in European smart meter rollouts</td></tr><tr><td>**IEEE 1901.2 PLC**</td><td>IEEE 1901.2</td><td>Layers 1-2</td><td>Power Lines</td><td>Mesh, Star</td><td>Up to several km</td><td>2.4–500 kbps</td><td>Smart grids, smart cities</td><td>High interoperability, IPv6 support; ideal for utility and smart city deployments</td></tr><tr><td>**M-Bus (Meter-Bus)**</td><td>EN 13757</td><td>Layers 1-2</td><td>Twisted pair cable</td><td>Bus</td><td>Up to ~1 km</td><td>0.3–38.4 kbps</td><td>Meter reading (water, heat, gas)</td><td>Widely used in Europe; reliable, low-cost wired solution</td></tr><tr><td>**KNX**</td><td>ISO/IEC 14543-3</td><td>Layers 1-2</td><td>Twisted pair cable</td><td>Bus, Star, Tree</td><td>Up to ~1 km</td><td>9.6 kbps</td><td>Building automation, home control</td><td>Open standard for building automation, popular in Europe</td></tr><tr><td>**BACnet MS/TP**</td><td>ASHRAE 135</td><td>Layers 1-2</td><td>RS-485 twisted pair</td><td>Bus</td><td>Up to ~1.2 km</td><td>9.6–115.2 kbps</td><td>Building automation, HVAC controls</td><td>Common in building and industrial automation; robust, scalable</td></tr><tr><td>**Ethernet**</td><td>IEEE 802.3</td><td>Layers 1-2</td><td>CAT5/CAT6 cable</td><td>Star, Tree</td><td>Up to ~100 m</td><td>10 Mbps–100 Gbps</td><td>Networking backbone, smart buildings</td><td>High-speed, standard networking; widely supported across industries</td></tr><tr><td>**RS-485 (EIA-485)**</td><td>EIA-485</td><td>Layers 1-2</td><td>Twisted pair cable</td><td>Bus</td><td>Up to ~1.2 km</td><td>Up to 10 Mbps</td><td>Metering, industrial control systems</td><td>Simple, robust, widely used for serial data transmission</td></tr><tr><td>**CAN Bus**</td><td>ISO 11898</td><td>Layers 1-2</td><td>Twisted pair cable</td><td>Bus</td><td>Up to ~1 km</td><td>Up to 1 Mbps</td><td>Automotive, industrial automation</td><td>High reliability, robust error detection, common in harsh environments</td></tr></tbody></table>

#### Recommended Wired Protocols for Residential Microgrid Metering (Uganda)

- **PLC-based (e.g., G3-PLC or IEEE 1901.2)**:
    
    
    - Ideal due to existing infrastructure (power lines).
    - Good for scalable, reliable deployments.
- **RS-485**:
    
    
    - Robust, simple wiring suitable for smaller clusters.
    - Common for direct-wired connections (local clusters).
- **M-Bus**:
    
    
    - Suitable if integrating gas, water, or heat metering alongside electricity

### Comparison between wired and wireless   


<table id="bkmrk-aspect-wireless-opti"><thead><tr><th>Aspect</th><th>Wireless Option (Wi-SUN/LoRaWAN)</th><th>Wired Option (G3-PLC, RS-485)</th><th>Recommendation</th></tr></thead><tbody><tr><td>**Installation Cost**</td><td>🟢 Lower</td><td>🔴 Higher (cabling, labor)</td><td>Wireless ✅</td></tr><tr><td>**Maintenance Cost**</td><td>🟡 Moderate (battery replacements)</td><td>🟢 Low (no batteries required)</td><td>Wired ✅</td></tr><tr><td>**Reliability**</td><td>🟡 Medium (environment dependent)</td><td>🟢 High (consistent, stable)</td><td>Wired ✅</td></tr><tr><td>**Scalability**</td><td>🟢 High (easy additions)</td><td>🔴 Moderate to low (harder additions)</td><td>Wireless ✅</td></tr><tr><td>**Range/ Coverage**</td><td>🟢 Good (with repeaters)</td><td>🟢 Excellent (using PLC)</td><td>Wired (PLC) ✅</td></tr><tr><td>**Security**</td><td>🟡 Good (depends on setup)</td><td>🟢 Very Good</td><td>Wired ✅</td></tr><tr><td>**Installation Time**</td><td>🟢 Short</td><td>🔴 Longer</td><td>Wireless ✅</td></tr><tr><td>**Physical disruption**</td><td>🟢 Minimal</td><td>🔴 High (trenching, wiring)</td><td>Wireless ✅</td></tr></tbody></table>

### 💡 Recommended Choice: Hybrid or G3-PLC

#### 📌 Primary Recommendation: G3-PLC (Wired)

Given your scenario (dense apartment blocks with existing electrical infrastructure and meters located closely on the ground floor), **G3-PLC** offers significant advantages:

- **Low Ongoing Maintenance:** No batteries to manage.
- **High Reliability:** Stable signal leveraging existing wiring.
- **Cost-effective (long-term):** Minimal ongoing costs after initial installation.
- **Robust &amp; secure**: Highly suited for apartment complexes.

#### 📌 Alternate Recommendation: Hybrid (PLC Backbone + Wireless Endpoints)

If flexibility or future expansions matter, consider a hybrid setup:

- Use **G3-PLC** within each block to connect meters reliably to a local gateway.
- Connect block gateways to a central system via wireless (**Wi-SUN or LoRaWAN**). This reduces physical disruption between buildings while maintaining the reliability within each block.

This hybrid method provides the best of both worlds—flexibility and low maintenance.

### Links

[Chatgpt detailed thread](https://chatgpt.com/share/682665f4-9c6c-800c-a63f-6d58c790a91a)