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| __TOC__ | | __TOC__ |
| ==Summary== | | ==Summary== |
| In this guide, the MQTT Serial Gateway function will be configured using third-party MQTT Broker services (in this example, ''Flespi.io'').
| | This article contains instructions on how to send M-Bus data to the server using various protocols. |
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| ==Configuration overview & prerequisites== | | ==Configuration overview & prerequisites== |
| *Two devices with serials ports - one acts as Modbus RTU Master, another as Modbus RTU Slave;
| | Before we begin, let's take a look at the configuration that we are attempting to achieve and the prerequisites that make it possible. |
| *Flespi.io account to act as an MQTT Broker/Publisher/Subscriber (for first configuration example);
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| [[File:MQTT Serial gateway topology v2.png|border|center|class=tlt-border|847x279px]]
| | '''Prerequisites''': |
| | * TRB143; |
| | * M-Bus device; |
| | * Server; |
| | * An end device (PC, Laptop, Tablet, Smartphone) for configuration; |
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| RUT2 will act as a Modbus RTU slave and RUT1 as a Modbus RTU Master. On RUT1, MQTT Serial Gateway will be configured to transfer Modbus data over MQTT. Flespi.io platform will serve as an MQTT Broker
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| ==RUT2 configuration==
| | {{Template:Networking_rutos_manual_basic_advanced_webui_disclaimer |
| ===Configuring Modbus RTU Slave=== | | | series = RUTX |
| ----
| | }} |
| Go to Services → Modbus → Modbus RTU Slave and create a new instance.
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| # Enter the '''desired instance name''';
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| # Select the '''desired serial interface'''.
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| [[File:Modbus RTU Slave.png|border|center|class=tlt-border|855 × 308px]]
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| ==RUT1 configuration== | | ==Adding M-Bus devices== |
| ===Configuring MQTT Gateway===
| | To add a new device to the configuration press [[File:Add Button.png|60x90px]] button which is shown below. |
| ----
| |
| Go to '''Services → Modbus → MQTT Gateway''' and there:
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| # '''Enable''' the '''instance''';
| | [[File:Mbus adding new device.png||border|class=tlt-border|center]] |
| # '''Enter Host''' (copied from flespi connection settings without 'wss://' and port);
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| # '''Enter Username''' (Copied from flespi Connection settings generated '''token''');
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| # '''Enter Password'''.
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| [[File:MQTT Gateway config.png|border|center|class=tlt-border|862 × 412px]]
| | Configure your device accordingly: |
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| '''Note''': ''Everything else can be left as default or changed according to your needs.'' | | # '''Name''': Enter the desired name of the M-Bus device |
| | # '''Address type''': select which M-Bus address will be used |
| | # '''Primary/Secondary address''': specify M-Bus address |
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| ===Configuring Serial Gateway===
| | [[File:Mbus adding new device configuration v3.png|border|class=tlt-border|center]] |
| ----
| |
| Under the MQTT Gateway configuration, create the Serial Gateway:
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| # Enter the '''desired device ID''';
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| # Select the '''desired serial interface'''.
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| [[File:Serial gateway config.png|border|center|class=tlt-border|868×308px]] | | Test if the M-Bus device is reachblae by specify address. To do so click on [[File:Ping_device_option_mbus.png|110x110px]]. You migth get two outputs: |
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| ===Configuring Flespi.io MQTT Broker===
| | [[File:Mbus device pingable v2.png|border|class=tlt-border|221×82px]] |
| ---- | |
| '''Log in''' or '''create an account''' on '''https://flespi.io''';
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| #Navigate to '''MQTT Board''' on the '''left side''' menu;
| | [[File:Mbus device not pingable v2.png|border|class=tlt-border|221×82px]] |
| #On the right-hand panel, top right corner, next to the name of the MQTT board, '''press the cogwheel-looking icon''' to open ''Connection Settings'';
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| #In the opened window, press '''"Get flespi token"''' to generate a username;
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| #Enter the '''Client name''';
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| #Copy the Host address;
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| #Copy '''Username''';
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| #Create a '''password'''.
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| Once done, save all the changes.
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| [[File:Flespi board.png|border|center|class=tlt-border|1102x729px]]
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| ===Message format for MQTT publisher===
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| ----
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| Modbus request data sent in the MQTT payload should be generated in accordance with the following format:
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| <pre>1 <COOKIE> <SERIAL_DEVICE_ID> <TIMEOUT> <SLAVE_ID> <MODBUS_FUNCTION> <FIRST_REGISTER> <REGISTER_COUNT> </pre>
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| The table below explains what each option means:
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| {| class="wikitable"
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| |1. Format version
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| |'''1'''
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| |-
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| |2. Cookie
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| |from '''0''' to '''2<sup>64</sup> -1'''
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| |-
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| |3. Serial device ID
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| |a string used to identify a serial device. Must match with <u>Device ID</u> field in MQTT Gateway page Serial gateway configuration section
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| |-
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| |4. Timeout
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| |timeout for Modbus connection, in seconds. Range [1..999].
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| |-
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| |5. Slave ID
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| |Indicates to which slave request is sent
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| |-
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| |6. Modbus function
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| |Modbus task type that will be executed. Possible values are:
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| <ul>
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| <li><b>1</b> - read coils;</li>
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| <li><b>2</b> - read input coils;</li>
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| <li><b>3</b> - read holding registers;</li>
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| <li><b>4</b> - read input registers;</li>
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| <li><b>5</b> - set single coil;</li>
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| <li><b>6</b> - write to a single holding register;</li>
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| <li><b>15</b> - set multiple coils;</li>
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| <li><b>16</b> - write to multiple holding registers.</li>
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| </ul>
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| |-
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| |7. First register
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| |number (not address) of the first register/coil/input (in range [1..65536]) from which the registers/coils/inputs will be read/written to.
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| |-
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| |8. Registry count
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| | <li><b>1</b> - <u>coil count</u> (in range [1..2000]); must not exceed the boundary (first coil number + coil count <= 65537);</li>
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| <li><b>2</b> - <u>input count</u> (in range [1..2000]); must not exceed the boundary (first input number + input count <= 65537);</li>
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| <li><b>3</b> - <u>holding register count</u> (in range [0..125]); must not exceed the boundary (first register number + holding register count <= 65537);</li>
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| <li><b>4</b> - <u>input register count</u> (in range [0..125]); must not exceed the boundary (first register number + input register count <= 65537);</li>
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| <li><b>5</b> - <u>coil value</u> (in range [0..1]);</li>
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| <li><b>6</b> - <u>holding register value</u> (in range [0..65535]);</li>
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| <li><b>15</b> - <u>coil count</u> (in range [1..1968]); must not exceed the boundary (first coil number + coil count <= 65537); and <u>coil values</u> separated with commas, without spaces (e.g., <i>1,2,3,654,21,789</i>); there must be exactly as many values as specified (with coil count); each value must be in the range of [0..1].
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| |}
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| ====Examples====
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| ----
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| {| class="wikitable"
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| |Setting relay (on) (Relay address is 202, which means 'Number of first register will be 203)
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| |'''1 1 1 1 1 6 203 1'''
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| |-
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| |Getting temperature
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| |'''1 1 1 1 1 3 6 2'''
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| |}
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| Modbus parameters are held within registers. The register numbers and corresponding system values can be found [[RUT955_Monitoring_via_Modbus#Get_Parameters|'''in this article''']].
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| ==Testing MQTT Publisher and Subscriber on flespi.io==
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| ====Adding Flespi Subscriber====
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| ----
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| To test the Modbus Serial Gateway functionality, '''log into''' your '''Flespi account''' → '''MQTT Board''' and '''add a Subscriber''':
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| #Press '''''<nowiki/>'+'''''' button on the top right corner
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| #Select '''''<nowiki/>'Subscriber''''''
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| # In the topic field enter '''''<nowiki/>'response''''''
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| #Press '''''<nowiki/>'Subscribe'''''' button
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| [[File:Flespi subscriber.png|border|class=tlt-border|496x204px]] [[File:Flespi subscriber setup.png|border|class=tlt-border|496x205px]]
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| ====Adding Flespi Subscriber====
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| ----
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| Also, you will need to '''add a Publisher''':
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| #Press '''''<nowiki/>'+'''''' button on the top right corner
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| #Select '''''<nowiki/>'Publisher''''''
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| #In the topic field enter '''''<nowiki/>'request''''''
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| #In the message field enter message, for this example '''''<nowiki/>'Getting temperature'''''' is used
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| #Press '''''<nowiki/>'Publish'''''' button
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| [[File:Flespi publisher.png|border|class=tlt-border|495x238px]] [[File:Flespi publisher setup.png|border|class=tlt-border|494x239px]]
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| ====Flespi Subscriber output====
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| ----
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| Check the response in the '''''<nowiki/>'Subscriber'''''' tab, you should receive a message similar to the one below.
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| [[File:Flespi response.png|border|center|class=tlt-border|500x305px]]
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| In the output, we can see that router's '''temperature''' is '''44 degrees Celsius'''.
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| ==See Also== | | ==See Also== |
button which is shown below.
. You migth get two outputs:
