I2c to modbus. looks The RS485 I2C adapter is an universal applicable I2C-tool with a 128 bytes of buffer and an adjustable SCL-frequency up to 400 kHz. I2C Modbus Serial Slave Chip (IS4310) from Inacks on TindieDescription The IS4310 is a chip that integrates a Modbus RTU Slave stack. Introduction The RS485 I2C adapter is an universal applicable I2C-tool with a 128 bytes of buffer and an adjustable SCL-frequency up to 400 kHz. So my setup is basically modbus slave + I2C master. Jan 28, 2022 · Hello All. M May 14, 2016 · In this test we will read a potentiometer 100k connected to the input analog 0, the value of ADC0 0-1023 be transmitted via Modbus RTU Simulator Master Modbus in Holding Register [11] and this transmitted value is displayed on the display oled Connected to the Arduino via I2C. Learn its types (RTU, TCP), function codes, frame formats, troubleshooting tools, and simulators. Currently at Avontec Automation PVT LTD, I lead embedded / IoT systems development, optimizing communication interfaces and enhancing system performance. But what exactly is a Modbus Gateway? Let The IS4360 integrates Modbus TCP/IP and RTU Master stacks in one chip, controlled by your microcontroller via I2C. By integrating this module into your project, you instantly get a working Modbus RS485 interface — just read from or write to the IS4310's I2C memory registers, which d Oct 1, 2023 · I2C转485芯片是一种用于将I2C总线转换成标准RS485接口的芯片，它可以大大提高I2C总线的传输距离，支持多节点的连接，并具有防止干扰的功能。 The sketch creates a Modbus sensor using the IS4310. Figure 1 Modbus adapter box prototype. . I am able to read data live on the serial monitor on the Arduino IDE. How it Works? The chip provides two interfaces: An I2C interface for your microcontroller, FPGA, Arduino, Raspberry Pi, etc. Modbus TCP Last but not least is Modbus TCP, which is an implementation of the Modbus serial protocol over Ethernet. Please refer to the new product reference for further details. Feb 9, 2020 · What's the difference between CANBUS, SMBUS, and I2C, especially as related to BMS and Inverter systems? I noticed that there's another protocol on this page called SMBus. This image shows the I2C frame where a microcontroller requests to read a holding register from our Modbus RTU Slave Stack Chip, IS4310. CONTROLLINO MICRO board. Depending on The sensor uses I2C communications but the application note says: "The I2C implementation does not use the Serial Line protocol. I'd like to use an Uno with some i2c expanders to control 64 or more i/o and then map them to modbus so that it would be a modbus slave. As a result of my working with Modbus TCP over the past several weeks I have developed this Modbus TCP library that someone might find useful. The module is daisy-chained: it integrates two RJ45 connectors with the standard Modbus pinout. I am able to read data live on the serial monitor on the arduino IDE. Für unser Beispiel ist als Kopf der Arduino-I2C-Master mit gestecktem WizNET W5500 LAN-Modul. It features an internal memory of 500 Holding Registers (free for your use), accessible by both a microcontroller (via I2C) and a Modbus Master device (e. I2c specs are attached to be matched. Also, it Serial to I2C Converter Adapter 8-Port I2C Communications Dual XBee® Interface for a Wide Variety of Communication Technologies, Including Long Range Wireless 900MHz and 2. MAX485 read value from my sensor or energy meter and the values push to the SD card. h for managing i2c Dec 11, 2020 · MODBUS is just a communication protocol that runs on an existing physical layer - RS485. I2C Primer is the most commonly used I2C. The I2C and Modbus examples uses Wire and SoftwareSerial libraries, where the first is only used in the I2C examples and the latter is used in all but one of the I2C examples. Select the Modbus master and slave library that fits your needs best. " How would I go about reading the chip in python, it seems the usual 'smbus. A UART output to connect your preferred RS485 (or RS232, RS422) transceiver. Jan 27, 2021 · I2C, SMBus, and PMBus are communication protocols used in embedded systems. Nov 29, 2022 · I am making a data logger which is using Ds3231 clock, TTL converters (MAX485 breakout board), SD card reader. For selecting Modbus protocol, the SEL pin needs to be pulled to VDD Voltage. I don't know enough about programming to combine the 2 1. It defines the message structure that controllers can Sep 25, 2022 · 常用的总线协议，I2C，SPI，CAN，MODBUS RTU485，随笔记录，除了CAN总线，其他都用过无数次了，有时间再补一补把，太基础了 Oct 20, 2022 · 本文详细介绍了I2C的100K、400K速度及实现方法，SPI的全双工特性、四种模式，以及Modbus RTU 485的RS485原理、Modbus协议和地址结构。重点讲解了CAN总线的双工通信方式。 Apr 25, 2022 · Software marcel April 25, 2022, 12:15pm 1 Hi, We try to connect PLC (TM241) to ASD7828. B. I am currently working on a project that uses both I2C communication and Modbus Communication protocols. ). Can i use RS485 with Mudubus for the link between the Arduinos? Will the RS485 interfere with the use of the i2c on Explore the differences between CAN and Modbus protocols, their advantages, and application areas for real-time control, industrial automation, and data communication. In this test we will read a potentiometer 100k connected to the input analog 0, the value of ADC0 0-1023 be transmitted via Modbus RTU Simulator Master Modbus in Holding Register [11] and this transmitted value is displayed on the display oled Connected to the Arduino via I2C. The simplest "Arduino" solution would be to create a new RS485 device on your RS485 bus using another MAX485 and a small Arduino (micro, nano, etc) that responds to MODBUS RTU instructions and controls the relay board for you. Oct 3, 2023 · I2C的缺点 I2C由于其单线操作，只能连接有限的设备。 此外，I2C的通信距离有限，只能在短距离内传输数据。 此外，I2C的通信速率较低，不能满足高速传输的需求。 I2C的应用 I2C可以用来实现Modbus，它可以连接多个设备，以实现分布式系统的数据采集和访问。 The Lan I2C Adapter VM is a versatile programmable Ethernet to I2C adapter. That's where the i2c to rs485 converter comes into play, bridging the gap between two widely used but fundamentally different protocols. Introduction This article contains information about the Modbus serial communication protocol and how it can be used with Arduino hardware. Sep 29, 2023 · 本文介绍了I2C和Modbus的重要性，以及它们之间的不同之处。 I2C是一种低成本的技术，可以在保持相对低速的情况下实现多芯片连接，而Modbus则拥有更高的数据传输速度和更远的传输距离。 Aug 14, 2012 · USART, UART, RS232, USB, SPI, I2C, TTL, etc. This can either be done by the host system or alternatively in the assembly line with temporary connector pins. It automatically handles frame generation, Tibbo Modbus Gateways route Modbus requests and replies between Modbus TCP, Modbus ASCII, and Modbus RTU masters and slaves. What is that? Also, what about I2C bus? Does that work with inverters? If the protocols are simple enough, I don't mind Can read attached sensor data over 1wire, i2c, spi, but also could do gpio or adc Has its own bootloader that speaks modbus and can be reprogrammed right on rs485 wires Can read attached sensor data over 1wire, i2c, spi, but also could do gpio or adc Has its own bootloader that speaks modbus and can be reprogrammed right on rs485 wires SUB-20 is a versatile and efficient bridge device providing simple interconnect between PC (USB host) and different HW devices and systems via popular interfaces such as I2C, SPI, MDIO, RS232, RS485, SMBus, ModBus, IR and others. Modbus RTU在线工具，集成命令生成、响应数据生成和数据解析功能。支持多种数据类型和字节序，内置CRC校验，是工业自动化通信调试的必备助手。 Sep 2, 2020 · There will be up to eight (8) 4 to 20mA sensors (measuring water tank levels) on each arduino. what are all of these and how do they relate to each other? Sep 1, 2020 · MODBUS协议是一种人为约定的协议，他和SPI，IIC，CAN总线协议还是有些不同的，SPI，IIC，CAN总线这些协议必须是设备在硬件上支持的，可以说SPI，IIC，CAN总线是一种软硬件的结合体，也就是常分为两层物理层和协议层，MODBUS本身就是类似于协议层的东西，而RS232和 Apr 18, 2024 · For example, let’s consider the I2C communication protocol, which requires physical connection to the I2C bus. The different elements are highlighted, compatible libraries and boards are shown together with example code. I have a scd30 sensor wired to an Arduino Uno. It is a two-wire protocol with variable speed (typically up to 400 kHz, high speed modes up to 5 MHz). , PLC, computer, etc. The I2C library abstracts most of the Modbus calls needed to run I2C. Feb 13, 2016 · The I2C communication protocol combines the best features of SPI and UART. Feb 22, 2008 · The other ones (Canbus,MODbus and I2C) can let multiple units communicate (master and slave communication) with each other. For prototyping? Yes! But for a bulletproof production environment, this practice just won’t make the cut. Mit dem RS485 I2C Adapter als I2C Master können beliebige Busteilnehmer angesprochen werden. With SHT45 works without problems. I was loking for MAX1307 and SC16IS750IBS. Learn how these protocols compare and their differences. Find this and other Arduino tutorials on ArduinoGetStarted. I2C（Inter-Integrated Circuit）通信总线，作为嵌入式系统设计中的一个关键组成部分，其灵活性和高效率使其在高级应用中备受青睐。本文旨在提供关于I2C通信总线的深度解析，包括其基本概念、特点、通信协议，以及… Effortlessly connect industrial devices, machines or networks Gateways & protocol converters Anybus gateways and protocol converters simplify industrial connectivity by making it easy to connect devices, machines, controllers, and systems quickly and reliably. Modbus Application Protocol assumes an abstract communication layer that allows devices to exchange small packets. Two example codes are provided to support I2C to work in controller mode or target mode respectively. The IS4360 is a chip that integrates a Modbus TCP/IP Master stack. com. Find this and other ESP32 tutorials on esp32io. This mo… Mar 2, 2021 · I am trying to implement Modbus slave device, which will take data from I2C sensor and store the values on it's modbus slave registry. This is where your system reads/writes Modbus data. It also requires pull-up resistors and defines the high and low voltage levels at the physical layer. I have an ethernet shield on my arduino. I am an R&D Engineer specializing in embedded firmware and hardware development, real-time operating systems, and communication protocols (Modbus RTU, TCP/IP, HART, I2C, SPI, UART, UNI/O). But what are the main differences between those three? The SCD30 must be configured via the I2C or the Modbus protocol according to this interface description. Modbus RTU RS485 Slave module with castellated holes, featuring the IS4310 Modbus RTU stack chip and 500 free Holding Registers. I am using a custom Arduino Micro (incorporates arduino micro, I2C multiplexer, and RS485 Shield. I need a I2C to RS485 converter. Whether you're dealing with a large-scale industrial network or a compact embedded system, i2c modbus tcp is the key to unlocking the full potential of your devices. Thanks Feb 2, 2017 · Hello Everyone! I'm new to the Arduino ecosystem, I don't know if this is possible. 2. You don't have to run MODBUS over RS485 - you can run whatever you like over RS485, it's just serial. The I2C-Serial Interface can connect to a Microcontroller, microprocessor, single board computer like Raspberry Pi, or development boards like Arduino. ) The project is reading up to 48 I2C sensors using an I2C multiplexer (if you need my hardware specifications please let me know. Provide an RS485 converter chip (p. Now, I want to include a timestamp for each value pushed to the SD card without interruption so I used DS3231 with its library. ino file from Github: I2C or Inter-Integrated Circuit is a commonly used serial communication protocol in establishing communication between devices especially for two or more different circuits. Jan 30, 2025 · Modbus RTU: A Comprehensive Guide to Understanding and Implementing the Protocol Owing to its simple and straightforward nature, Modbus RTU is the engineer and technician's go-to protocol in industries such as manufacturing, energy, and transportation. I have an ethernet shield on my Arduino. The I2C protocol is used in a huge range of chips - just a few examples from this site include the DS1307 (RTC), SSD1306 (OLED Display), MCP23017 (Serial expander). Our Modbus Gateways comprise compatible Tibbo Project System (TPS) devices and DS1101 / DS1102 controllers running an open source Modbus gateway application. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with ESP32. It provides an inexpensive bus for connecting many types of devices with infrequent or low bandwidth communications needs. read_byte_data' would not work in this situation. It automatically handles frame generation, ti The i2c modbus tcp protocol allows for reliable data transfer between devices, ensuring that critical information is accurately transmitted across your network. If you need more information provide details about your setup and what exactly you Dec 8, 2013 · While working with modbus for a project at work I have been messing around with Modbus at home with my arduino boards. We’ll be using a modified version of an example code that demonstrates how to control an LED via a Modbus TCP server. This guide will show you how it works in an easy to understand format. The abstraction allows users to focus on I2C rather than Modbus, and reduces the memory requirements of scripts. c) bytes in some structured form, or structure is slow enough that sw can make it happen [modbus is ths with rs485] d) complex and fast packet based CAN bus, i2c, spi, usb requires semi dedicated hardware to make it happen). Die RS485-Adresse ist über einen 8bit DIP-Schalter einstellbar. The Arduino reads the analog value from a potentiometer connected to pin A0, and writes it to Modbus Holding Register 0x0000 of the IS4310 via I2C. e. MAX485) to every node (including the master) and connect all A and all B and all GND. Der Mikrocontroller sendet eine Anfrage-Nachricht als Master per MODBUS an den Laderegler weiter. Prerequisites Installed Arduino IDE. For this, I have used two Arduino, one programmed in Simulink to do I2C communication with other Arduino and the Second one is programmed using Arduino IDE for I2C as well as Modbus communication. With experience as a Firmware Design Engineer at Sq. Supports TCP, UDP and ModBus to I2C. Requested documentation from the seller. Oct 18, 2021 · That should work ok. I think what you want is to go from TTL I2C (what comes out of the Arduino) to RS485 asynchronous serial. g. It can communicate with a master unit by the digital MODBUS protocol. Upload the following sketch to Arduino configured as a Modbus transmitter. It is also a master/slave network and supports many new and legacy devices. I Sep 6, 2018 · Hi, So far I have connected a 3 in 1 sensor to an arduino yun rev 2. Introduction to I2C and SMBus ¶ I²C (pronounce: I squared C and written I2C in the kernel documentation) is a protocol developed by Philips. With over 250 models, we can solve almost any connectivity challenge. Oct 25, 2024 · Through an in-depth understanding of UART, RS232, RS485, I2C, and SPI protocols, engineers can select the most suitable communication method for a specific application to ensure system stability Sep 26, 2023 · Arduino Modbus TCP example To set up communication between the two Arduino boards using the Modbus TCP and the Arduino Modbus library, install Ethernet shields on the two boards and connect both Arduinos to the same network through the Ethernet cables or a WiFi connection. Dec 12, 2018 · Subsequently, Modbus specifications were extended to support other types of buses or networks. 4GHz, Bluetooth, Ethernet, WiFi, RS-232, RS-485, and WiFi MQTT for Internet Access and Control Applications. The i2c to rs485 solution is designed to connect I²C-based devices with RS-485 networks, enabling seamless data exchange in environments that require long-distance, noise-resistant communication. Connect NCD I2C Devices to your Network over Ethernet Learn: How to use ESP32 Modbus library, what is Modbus, why needs Modbus, how Modbus works, how many types of Modbus, and Modbus RTU/ASCII, Modbus TCP. In this I2C tutorial you will learn all about the 2 wire I2C serial protocol; How easy it is to use, how it works and when to use it. We invite you to design and share with us. Versions of the Modbus protocol exist for serial lines (Modbus RTU and Modbus ASCII) and for Ethernet (Modbus TCP). Any help? Sep 10, 2020 · In my project, I need to program my Arduino (Mega 2560) through Simulink and need to send sensor data and take control commands from Micro Lab Box (over Ethernet Modbus). The internal memory is composed of 504 These examples show how to implement I2C and Modbus communication with a Senseair Sunrise Sensor, using the Arduino IDE. The flexibility and adaptability of Tibbo Modbus Gateways allow you to use them in practically any Modbus system. MBeasy Modbus TCP library with examples and Home / Learn / Inter-Integrated Circuit (I2C) Protocol Inter-Integrated Circuit (I2C) Protocol Allows the communication between devices or sensors connected via Two Wire Interface Bus. Daneben folgende Module – Digitale I2C-Eingangskarte I2HE (Slave-Adresse 112) – Digitale I2C-Ausgangskarte I2HA (Slave-Adresse 64) – Analoge I2C-Eingangskarte I2HAE (Slave Adresse 16) – Analoge I2C-Ausgangskarte I2HAA (Slave Adresse 176) Software Modbus-TCP-Server Die Modbus-TCP-Bibliothek Ethernet to I2C Converter Ethernet to I2C Converter Adapter with DHCP Static IP, Programmable TCP Port and Hardware I2C Port Supports TCP Communications and 100KHz-400KHz I2C Speeds. The IS4310-485M2 is a ready-to-operate module integrating the Modbus RTU Slave chip IS4310 with an RS485 Transceiver. Replaced by: IN702MEB0600000 M-BUS to Modbus TCP & RTU Server Gateway Item number INMBSMEB0600000 Used to integrate any M-Bus device with a Modbus BMS or any Modbus TCP or Modbus RTU controller. Sep 10, 2018 · I have a scd30 sensor wired to an arduino uno. The following section gives an overview of Modbus compatible Arduino boards and the libraries to enable Modbus protocol capability. All these protocols have their own advantages and lim-itations. This is the fieldbus that connects to a PLC, computer, or machine. The Modbus-I2C-Converter communicates the PO2S Sensor every 500ms, reads oud the ADC count and saves it in the internal memory. Industrial Wireless RS485 Modbus Transmitter The NCD Industrial Wireless RS485 Modbus Transmitter transforms Modbus devices into seamless wireless nodes, enabling effortless integration into the NCD wireless network and eliminating the need for cumbersome wired connections. I2C is widely used with Jun 5, 2023 · Learn what a Modbus Gateway is, its functionalities, and how it can improve your industrial communication system. Whether you need protocol conversion, system integration, or want The IS4310-485M2 is a Modbus RS485 module that integrates a Modbus RTU stack chip (IS4310), an RS485 transceiver and two daisy-chained RJ45 connectors. Dec 24, 2019 · Whether you are sharing innovative hardware designs or finding design inspiration, this is the best place for you. The scd30 works on the I2C protocol. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. This article will provide the basi Received a new version with a screen over the details. CAN-I2C bridge allows a device to send/receive information on one interface and receive/send the information on the other interface Download the code for this example. Arduino1(Simulink)<---I2C Sep 6, 2021 · Hey guys, I was wondering if I could read out multiple temperature sensors with an I2C bus, and convert the incoming signals to Modbus 485 with a single arduino. Demo repo with Modbus RTU implementation for rp2040 (Raspberry Pi Pico) with C++ SDK - danjperron/rp2040-modbus_example Feb 21, 2025 · The Modbus-UART can connect with different types of transceivers, such as RS485, RS422, RS232, fiber and radio, with RS485 being the most typical. If 400khz is fast, then I can limit 100Khz. Example Code Please grab the following example . The RS485-address of the adapter is Introduction This article contains information about the Modbus serial communication protocol and how it can be used with Arduino hardware. The Best Ethernet to I2C Converters Available Windows Demo Software Cross Platform Capable. folgendermaßen vor: Das I2C-Master-System sendet eine Anfrage-Nachricht an den I2C-Slave-Mikrocontroller und löst eine Interrupt-Routine aus. A MODBUS temperature sensor is a temperature sensor paired with a digital transmitter. Depending on The IS4320 is a chip that integrates a Modbus RTU Master stack. The scd30 works on theh I2c protocol. Further, I2C is not designed for connecting with long cables - it's meant for use between chips on a PCB. Jan 18, 2024 · Modbus 协议类型 在上面我们已经说明了 Modbus 可以在各种介质上传输，那么他的传输模式也分为三种：包括ASCII、RTU (远程终端控制系统)、TCP三种报文类型。 串行端口存在多个版本的Modbus协议，而最常见的是下面四种： Modbus-Rtu Modbus-Ascii Modbus-Tcp ModbusPlus Mar 31, 2017 · A few weeks back, we talked about the no-nos of running I²C over long wires. How does it work? Modbus is transmitted over serial lines between devices. There are other serial interfaces designed for communication across a board, such as SPI & I2C, but they are probably overkill. With the RS485 I2C adapter as master numerous bus participants can be adressed such as IOExpander, sensors, LCDs, 7-segment display, stepping motors, AD/DA converters, real time clocks, tone generators, RAM, EEProms, etc. Understanding Modbus RTU is crucial for seamless communication between electronic devices and optimizing system performance. The available Function Codes are: 0x03 Read Holding Registers 0x06 Write Single The IS4350 integrates both Modbus TCP/IP and RTU Slave stacks in a single chip, it is accessible from your uC via I2C. Serial-line Modbus remains an option for implementing this communication layer, but other networks and protocols may be used. Please refer to datasheet. In contrast, the Modbus protocol is an application-layer message transfer protocol that does not define the physical layer. The IS4310-ISO485M6 is a ready-to-operate module integrating the Modbus RTU Slave chip IS4310 with an isolated RS485 Transceiver. Jul 21, 2022 · 這表示I2C Primer和PMBus在電氣要求和命令語義上是相容和可交互操作的。 電源管理的基本參數之一是過壓位準監控，PMBus提供了設定和讀取該值的命令。 Introduction This tutorial will guide you through setting up a Modbus TCP server on a CONTROLLINO MICRO. Previously I was successfully able to implement modbus slave + I2C slave, where my The cheapest* RS485/ModBus repeater in the World! *may be A Modbus RTU Slave chip with I2C. Jan 25, 2024 · Explore Modbus, a widely used communication protocol in industrial automation. , were used in embedded systems. We can open the port (rel led ok), but we don’t get any data from ADS7828. Learn: How to use Arduino Modbus library, what is Modbus, why needs Modbus, how Modbus works, how many types of Modbus, and Modbus RTU/ASCII, Modbus TCP. Dec 12, 2024 · Cabling is specific to Profinet so, as a design effort, the cabling specifications should be adhered to. Feb 15, 2022 · Do I understand that right, you want to replace the existing communication on I2C by Modbus RTU? Yes, this is possible. We have Modbus TCP to I2C gateway: NCD5500. The sensor works on I2C communication. I Mar 27, 2025 · Your device can communicate with our protocol chip via I2C. I only really have basic knowledge on arduinos so learning as I go along here May 12, 2025 · Modbus is often used to connect a supervisory computer with a remote terminal unit (RTU) in supervisory control and data acquisition (SCADA) systems. The protocol allows you to connect many devices to a single set of two wires, and then Many serial commu-nication protocols like RS-232/RS-485, I2C, SPI, Modbus and CAN bus, etc. From beginner to specialist, we can all communicate and learn together. ) It takes this data, does some quick calculations Apr 11, 2017 · 1. Your microcontroller communicates with it via I2C, sending simple commands that the chip translates into its appropriate Read Holding Registers, Write Single Register or Write Multiple Registers function codes. Um z. Sensor output is only provided after sending the start measurement command to the SCD30. Preferred is hardware based solution so that no MCU programming is required & low power since system is battery powered. I've played with the modbus library and gotten the onboard i/o to work as coils and such but my ability stops there. Any particular reason you are going to use the Modbus protocol? For simple comms between 2 devices, I think Modbus may be overly complicated. I received some help from users in this forum during my testing and I thank you. The sensor does use the Modbus protocol, and wraps the message in I2C format. My code so far allows me to connect to the arduino and read the values in the serial monitor. As the clock is an I2C device so I also used wire. This solution reduces to the minimum expression the design effort of integrating a Modbus RTU Slave with RS485 electrical interface. The Arduinos will all need to talk to a master ardunio that i will keep connected to a computer and make a graphical user interface using other software with input from the sensor data. den Wert der aktuellen Spannung vom Laderegler zu bekommen, wird folgende Nachricht an den I2C Modbus RS485 from Inacks on TindieThe IS4310-485M2 is a ready-to-operate module integrating the Modbus RTU Slave chip IS4310 with an RS485 Transceiver. In our rapidly digitalizing world, where every second of downtime can lead to significant financial losses, understanding industrial communication protocols like Modbus, and more importantly, devices like Modbus Gateways, becomes essential. 1 Digital interface description The SCD30 digital interface is compatible with the I2C protocol and the Modbus protocol. 3. Design Description This subsystem demonstrates how to build a CAN-I2C bridge. May 23, 2016 · So in theory you could convert the TTL I2C signals to RS485 with two MAX485 but that's probably not what you want. The next step is setting up modbus tcp on the arduino so I can connect it to a field agent that will read the data. Mar 19, 2021 · Learn about the advantages of Modbus over newer protocols when choosing an interface with third-party devices. If I am polling data from the sensor modbus is not working, and when I commented the polling function modbus works fine. hxv faem qfkxb rxzin azaqqm qpza ctxzs qlkvq hddz ygn