> For the complete documentation index, see [llms.txt](https://docs.bituo-technik.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bituo-technik.com/device-api/spm-sdm-open-wi-fi-api-overview/modbus-tcp-map-esp32-8685.md).

# Modbus TCP Map - ESP32-8685

{% hint style="info" %}
**Status:** Draft| **Applies to:** SPM/SDM Open WiFi (ESP32-8685)  | **Firmware:** 5.1.11+ | **Updated:** 2026-06-18
{% endhint %}

### 1. Overview

This page documents the Modbus TCP over Wi-Fi interface for the Bituo SPM/SDM series smart meters. It covers connection requirements and the full register map.

***

### 2. Applied Product Models

This page documents the **Modbus TCP over Wi-Fi** interface for the Bituo SPM/SDM series smart meters. It covers connection requirements and the full register map.

<details>

<summary><strong>Single-Phase (SPM01-xxEW)</strong></summary>

<table><thead><tr><th width="64">#</th><th width="220">Ordering Number</th><th>Description</th></tr></thead><tbody><tr><td>1</td><td><strong>SPM01-D2EW</strong></td><td>SPM01 1PN FLEX/63A Wi-Fi (ESP32-8685)</td></tr><tr><td>2</td><td><strong>SPM01-D1EW</strong></td><td>SPM01 1PN MCBM-DM/63A Wi-Fi (ESP32-8685)</td></tr><tr><td>3</td><td><strong>SPM01-U1EW</strong></td><td>SPM01 1PN MCBM-UM/63A Wi-Fi (ESP32-8685)</td></tr></tbody></table>

</details>

<details>

<summary><strong>Split-Phase (SDM02-EW-*)</strong></summary>

<table><thead><tr><th width="64">#</th><th width="220">Ordering Number</th><th>Description</th></tr></thead><tbody><tr><td>1</td><td><strong>SDM02-EW-12</strong></td><td>SDM02 Split-Phase SCTA-2×120A/Φ16 Wi-Fi (ESP32-8685)</td></tr><tr><td>2</td><td><strong>SDM02-EW-20</strong></td><td>SDM02 Split-Phase SCTA-2×200A/Φ20 Wi-Fi (ESP32-8685)</td></tr><tr><td>3</td><td><strong>SDM02-EW-10U</strong></td><td>SDM02 Split-Phase SCTA-2×100A/Φ12 Wi-Fi(ESP32-8685)</td></tr></tbody></table>

</details>

<details>

<summary><strong>Three-Phase (SPM02-xxEW / SDM01-EWM-*)</strong></summary>

<table><thead><tr><th width="64">#</th><th width="220">Ordering Number</th><th>Description</th></tr></thead><tbody><tr><td>1</td><td><strong>SPM02-D2EW</strong></td><td>SPM02 3PN FLEX/63A Wi-Fi (ESP32-8685)</td></tr><tr><td>2</td><td><strong>SPM02-D1EW</strong></td><td>SPM02 3PN MCBM-DM/63A Wi-Fi (ESP32-8685)</td></tr><tr><td>3</td><td><strong>SPM02-U1EW</strong></td><td>SPM02 3PN MCBM-UM/63A Wi-Fi (ESP32-8685)</td></tr><tr><td>4</td><td><strong>SDM01-EWM-12</strong></td><td>SDM01 SCTA-3×120A/Φ16 Wi-Fi (ESP32-8685) + RS485</td></tr><tr><td>5</td><td><strong>SDM01-EWM-20</strong></td><td>SDM01 SCTA-3×200A/Φ20 Wi-Fi (ESP32-8685) + RS485</td></tr></tbody></table>

</details>

***

### 3. Connection & Protocol Notes

> **💡 Default Connection Parameters:** **Protocol:** Modbus TCP | **Port:** 502 | **Slave ID:** `1` | **Byte Order:** Big-Endian (ABCD)

{% hint style="warning" %}
**Critical: Single-Connection Limitation** The device firmware supports **only ONE concurrent TCP connection**\*\* and actively resets the socket after each read request.

**Integration Requirement:** Open a new TCP connection before each read operation and close it immediately afterward. A minimum delay of **150ms** between consecutive reads is recommended to prevent device overload.
{% endhint %}

**Supported Function Codes:**

* `0x03` — Read Holding Registers
* `0x04` — Read Input Registers *(Both function codes return identical data on this device.)*
* `0x06` — Write Single Register (Used for Control Commands only. )

***

### 4. Register Map

#### 4.1 Product Identification (Base Address: 978)

*This section is identical across all Single-Phase, Split-Phase, and Three-Phase devices.*

*Note: String fields are encoded as continuous UTF-8 byte streams. Register count = `Bytes ÷ 2`.*

<table><thead><tr><th width="110">Address (DEC)</th><th width="115">Address (HEX)</th><th width="160">Description</th><th width="90">Func Code</th><th width="80">R/W</th><th width="80">Bytes</th><th width="90">Registers</th><th width="110">Data Type</th><th width="240">Notes</th></tr></thead><tbody><tr><td>978</td><td><code>0x03D2</code></td><td>MAC Address</td><td>03, 04</td><td>R</td><td>12</td><td>6</td><td>UTF-8 String</td><td>Device Wi-Fi MAC address.</td></tr><tr><td>984</td><td><code>0x03D8</code></td><td>Model</td><td>03, 04</td><td>R</td><td>10</td><td>5</td><td>UTF-8 String</td><td>e.g., "SDM01_3PN"</td></tr><tr><td>989</td><td><code>0x03DD</code></td><td>MCU Version</td><td>03, 04</td><td>R</td><td>10</td><td>5</td><td>UTF-8 String</td><td>e.g., "5.1.11"</td></tr><tr><td>994</td><td><code>0x03E2</code></td><td>RSSI</td><td>03, 04</td><td>R</td><td>2</td><td>1</td><td>UINT16</td><td>Wi-Fi signal strength (dBm). Typical range: -30 ~ -90.</td></tr><tr><td>995</td><td><code>0x03E3</code></td><td>System Time</td><td>03, 04</td><td>R</td><td>4</td><td>2</td><td>UINT32</td><td>Unix timestamp (seconds since 1970-01-01).</td></tr><tr><td>997</td><td><code>0x03E5</code></td><td>Firmware Version</td><td>03, 04</td><td>R</td><td>6</td><td>3</td><td>UTF-8 String</td><td>Format: "x.x.x"</td></tr></tbody></table>

#### 4.2 Basic Metering Data

*All FLOAT32 values occupy 2 Modbus registers (4 bytes). Byte order: Big-Endian (ABCD). Please select the tab corresponding to your device type.*

{% tabs %}
{% tab title="Single-Phase" %}

<table><thead><tr><th width="110">Address (DEC)</th><th width="115">Address (HEX)</th><th width="230">Description</th><th width="90">Func Code</th><th width="55">R/W</th><th width="100">Data Type</th><th width="130">Range</th><th>Unit</th></tr></thead><tbody><tr><td>1000</td><td><code>0x03E8</code></td><td>Voltage</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>V</td></tr><tr><td>1002</td><td><code>0x03EA</code></td><td>Current</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>A</td></tr><tr><td>1004</td><td><code>0x03EC</code></td><td>Active Power</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kW</td></tr><tr><td>1006</td><td><code>0x03EE</code></td><td>Power Factor</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1.0 – 1.0</td><td>—</td></tr><tr><td>1008</td><td><code>0x03F0</code></td><td>Frequency</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>Hz</td></tr><tr><td>1010</td><td><code>0x03F2</code></td><td>Import Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1012</td><td><code>0x03F4</code></td><td>Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1014</td><td><code>0x03F6</code></td><td>Total Active Energy (Import + Export)</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr></tbody></table>
{% endtab %}

{% tab title="Split-Phase" %}

<table><thead><tr><th width="110">Address (DEC)</th><th width="115">Address (HEX)</th><th width="230">Description</th><th width="90">Func Code</th><th width="55">R/W</th><th width="100">Data Type</th><th width="130">Range</th><th>Unit</th></tr></thead><tbody><tr><td>1000</td><td><code>0x03E8</code></td><td>Voltage L1-N</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>V</td></tr><tr><td>1002</td><td><code>0x03EA</code></td><td>Voltage L2-N</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>V</td></tr><tr><td>1006</td><td><code>0x03EE</code></td><td>Current L1</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>A</td></tr><tr><td>1008</td><td><code>0x03F0</code></td><td>Current L2</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>A</td></tr><tr><td>1012</td><td><code>0x03F4</code></td><td>Active Power L1</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kW</td></tr><tr><td>1014</td><td><code>0x03F6</code></td><td>Active Power L2</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kW</td></tr><tr><td>1018</td><td><code>0x03FA</code></td><td>Reactive Power L1</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kVAR</td></tr><tr><td>1020</td><td><code>0x03FC</code></td><td>Reactive Power L2</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kVAR</td></tr><tr><td>1024</td><td><code>0x0400</code></td><td>Apparent Power L1</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kVA</td></tr><tr><td>1026</td><td><code>0x0402</code></td><td>Apparent Power L2</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kVA</td></tr><tr><td>1030</td><td><code>0x0406</code></td><td>Power Factor L1</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1.0 – 1.0</td><td>—</td></tr><tr><td>1032</td><td><code>0x0408</code></td><td>Power Factor L2</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1.0 – 1.0</td><td>—</td></tr><tr><td>1036</td><td><code>0x040C</code></td><td>Average Voltage L-N</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>V</td></tr><tr><td>1038</td><td><code>0x040E</code></td><td>Average Line Current</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>A</td></tr><tr><td>1040</td><td><code>0x0410</code></td><td>Unbalanced Line Currents</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-300 – 300</td><td>%</td></tr><tr><td>1042</td><td><code>0x0412</code></td><td>Total Line Currents</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 3000</td><td>A</td></tr><tr><td>1044</td><td><code>0x0414</code></td><td>Total Active Power</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-3000 – 3000</td><td>kW</td></tr><tr><td>1046</td><td><code>0x0416</code></td><td>Total Reactive Power</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-3000 – 3000</td><td>kVAR</td></tr><tr><td>1048</td><td><code>0x0418</code></td><td>Total Apparent Power</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-3000 – 3000</td><td>kVA</td></tr><tr><td>1050</td><td><code>0x041A</code></td><td>Total Power Factor</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1.0 – 1.0</td><td>—</td></tr><tr><td>1052</td><td><code>0x041C</code></td><td>Frequency</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>Hz</td></tr><tr><td>1054</td><td><code>0x041E</code></td><td>Total Import Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1056</td><td><code>0x0420</code></td><td>Total Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1058</td><td><code>0x0422</code></td><td>Total Import &#x26; Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1060</td><td><code>0x0424</code></td><td>L1 Import Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1062</td><td><code>0x0426</code></td><td>L1 Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1064</td><td><code>0x0428</code></td><td>L1 Import &#x26; Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1066</td><td><code>0x042A</code></td><td>L2 Import Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1068</td><td><code>0x042C</code></td><td>L2 Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1070</td><td><code>0x042E</code></td><td>L2 Import &#x26; Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr></tbody></table>
{% endtab %}

{% tab title="Three-Phase" %}

<table><thead><tr><th width="110">Address (DEC)</th><th width="115">Address (HEX)</th><th width="240">Description</th><th width="90">Func Code</th><th width="55">R/W</th><th width="100">Data Type</th><th width="130">Range</th><th>Unit</th></tr></thead><tbody><tr><td>1000</td><td><code>0x03E8</code></td><td>Voltage A-N</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>V</td></tr><tr><td>1002</td><td><code>0x03EA</code></td><td>Voltage B-N</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>V</td></tr><tr><td>1004</td><td><code>0x03EC</code></td><td>Voltage C-N</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>V</td></tr><tr><td>1006</td><td><code>0x03EE</code></td><td>Current A</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>A</td></tr><tr><td>1008</td><td><code>0x03F0</code></td><td>Current B</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>A</td></tr><tr><td>1010</td><td><code>0x03F2</code></td><td>Current C</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>A</td></tr><tr><td>1012</td><td><code>0x03F4</code></td><td>Active Power A</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kW</td></tr><tr><td>1014</td><td><code>0x03F6</code></td><td>Active Power B</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kW</td></tr><tr><td>1016</td><td><code>0x03F8</code></td><td>Active Power C</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kW</td></tr><tr><td>1018</td><td><code>0x03FA</code></td><td>Reactive Power A</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kVAR</td></tr><tr><td>1020</td><td><code>0x03FC</code></td><td>Reactive Power B</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kVAR</td></tr><tr><td>1022</td><td><code>0x03FE</code></td><td>Reactive Power C</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kVAR</td></tr><tr><td>1024</td><td><code>0x0400</code></td><td>Apparent Power A</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kVA</td></tr><tr><td>1026</td><td><code>0x0402</code></td><td>Apparent Power B</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kVA</td></tr><tr><td>1028</td><td><code>0x0404</code></td><td>Apparent Power C</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1000 – 1000</td><td>kVA</td></tr><tr><td>1030</td><td><code>0x0406</code></td><td>Power Factor A</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1.0 – 1.0</td><td>—</td></tr><tr><td>1032</td><td><code>0x0408</code></td><td>Power Factor B</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1.0 – 1.0</td><td>—</td></tr><tr><td>1034</td><td><code>0x040A</code></td><td>Power Factor C</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1.0 – 1.0</td><td>—</td></tr><tr><td>1036</td><td><code>0x040C</code></td><td>Average Voltage L-N</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>V</td></tr><tr><td>1038</td><td><code>0x040E</code></td><td>Average Line Current</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>A</td></tr><tr><td>1040</td><td><code>0x0410</code></td><td>Unbalanced Line Currents</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-300 – 300</td><td>%</td></tr><tr><td>1042</td><td><code>0x0412</code></td><td>Total Line Currents</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 3000</td><td>A</td></tr><tr><td>1044</td><td><code>0x0414</code></td><td>Total Active Power</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-3000 – 3000</td><td>kW</td></tr><tr><td>1046</td><td><code>0x0416</code></td><td>Total Reactive Power</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-3000 – 3000</td><td>kVAR</td></tr><tr><td>1048</td><td><code>0x0418</code></td><td>Total Apparent Power</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-3000 – 3000</td><td>kVA</td></tr><tr><td>1050</td><td><code>0x041A</code></td><td>Total Power Factor</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>-1.0 – 1.0</td><td>—</td></tr><tr><td>1052</td><td><code>0x041C</code></td><td>Frequency</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>0 – 1000</td><td>Hz</td></tr><tr><td>1054</td><td><code>0x041E</code></td><td>Total Import Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1056</td><td><code>0x0420</code></td><td>Total Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1058</td><td><code>0x0422</code></td><td>Total Import &#x26; Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1060</td><td><code>0x0424</code></td><td>Phase A Import Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1062</td><td><code>0x0426</code></td><td>Phase A Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1064</td><td><code>0x0428</code></td><td>Phase A Import &#x26; Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1066</td><td><code>0x042A</code></td><td>Phase B Import Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1068</td><td><code>0x042C</code></td><td>Phase B Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1070</td><td><code>0x042E</code></td><td>Phase B Import &#x26; Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1072</td><td><code>0x0430</code></td><td>Phase C Import Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1074</td><td><code>0x0432</code></td><td>Phase C Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr><tr><td>1076</td><td><code>0x0434</code></td><td>Phase C Import &#x26; Export Active Energy</td><td>03, 04</td><td>R</td><td>FLOAT32</td><td>±1,999,999,999</td><td>kWh</td></tr></tbody></table>
{% endtab %}
{% endtabs %}

***

### 5. Control Commands (Unicast)

Send these commands to a specific device's IP address using Modbus TCP with the target **Slave ID**.

{% hint style="warning" %}
**Write-Only Commands:** These registers are write-only and use Function Code \`0x06\` (Write Single Register). They are not readable. Sending an incorrect write value will have no effect.
{% endhint %}

<table><thead><tr><th width="101">Address (DEC)</th><th width="111">Address (HEX)</th><th width="240">Description</th><th width="98">Func Code</th><th width="89">R/W</th><th width="100">Data Type</th><th>Write Value</th></tr></thead><tbody><tr><td>10000</td><td><code>0x2710</code></td><td>Trigger LED Blinking (Device Locating)</td><td>06</td><td>W</td><td>UINT16</td><td><code>0x5055</code> (20565)</td></tr><tr><td>10001</td><td><code>0x2711</code></td><td>Reset Energy Accumulators</td><td>06</td><td>W</td><td>UINT16</td><td><code>0x51AA</code> (20906)</td></tr></tbody></table>

> 🔍 **Feature: Device Locating via LED** When multiple meters are installed in a dense electrical panel, send `0x5055` to a specific device's Slave ID. The target meter's **LED will blink rapidly for 15 seconds**, allowing field engineers to visually identify the physical device corresponding to that IP/Slave ID.

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