wifi-modbus-tcptortu's Introduction

WiFi-Modbus-TCPtoRTU

NOTE: ACTUALLY, THIS IS A RAW "GOOGLE" TRANSLATION FROM CYRILIC TO ENGLISH!! WiFi ESP8266 gateway Modbus TCP to Modbus RTU

The task:

The device is connected via a wireless connection (WiFi) via the uart or rs-485 interface to various devices for transferring the Modbus protocol from the TCP / UDP environment to the RTU.
The device should be small in size and be powered from the device to which it is connected.
The device must provide simultaneous connection of up to 4 TCP / UDP devices simultaneously.
The device must support the matching of requests from the master when more than one Modbus request is present in one TCP packet.
The device must support one telnet connection port 23 for setting up and diagnosing the WiFi device.
The device should be finished both in terms of use (universal) and have a body and body version.

Implementation:

As a basis, the Chinese-made ESP-01 card with WiFi module ESP8266 1 MB. At the output, we have 1 uart and 1 - GPIO.
The program is written on espressos SDK under arduino.
The IDE Platform io is used.

Implemented by:

The ability to connect 4 TCP masters.
UART with a speed of 115200 bit / c.
A port is opened for connecting Telnet port 23. This connection displays debug information trace.print and so on.
Testing was carried out using Modbus pull requests over TCP and Modbus slave responses over RTU.
Save the uart port settings and Telnet access point settings to the nonvolatile memory.

It remains to implement:

UDP support. (At the same time on 502 the port will not get on, or switch or put on another port)
Make a model of 3d case for printing on a 3D printer.
Develop a scheme for powering and pairing this device.

If there are interested persons, I invite to the company.

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