Table of contents

• Introduction
• Hardware
• Photos From My Project
• Technologies
• Setup
• Extra setups
• Problems We Had Solved
• Reference

Introduction

An OPC UA running server on ESP32-ISO development board with Ethernet and BME280 Sensor,DHT22 Sensor. Also with a temperature,pressure,humidity nodes reading over GPIO 4 and I2C from a DHT-22 sensor and BME280. The Project Build on ESP-IDF Environment to make it compatible with FreeRTOS and xtensa-toolchain.

Hardware Setup

BME280	GPIO ESP32
VCC	3V
GND	GND
SDA	GPIO13
SCL	GPIO16
SDO	3V

NOTE: BME280 has 2 mode SPI and I2C and when connecting SDO to 3V this will mapping to I2C

DHT22

DHT22	GPIO ESP32
VCC	3V
GND	GND
DATA OUT	GPIO 4

Photos

• Photo of ESP32-ISO https://www.olimex.com/Products/IoT/ESP32/ESP32-POE-ISO/open-source-hardware
• Photo of GPIO Map https://www.olimex.com/Products/IoT/ESP32/ESP32-POE-ISO/resources/ESP32-POE-ISO-GPIO.png
• Photo of BME280 https://esphome.io/components/sensor/bme280.html
• Photo of DHT22 https://www.sparkfun.com/datasheets/Sensors/Temperature/DHT22.pdf
• Photo of 3D Case https://www.thingiverse.com/thing:4860626

Technologies

Project is created in 2021:

• TCP-IP
• OPC-UA Protocol
• Power over Ethernet DC

Setup

These Points you need to follow :

* Building ESP-IDF Environment
* Clone OPC-UA Project & Building
* Flashing and Monitoring 
* Connect With OPC-UA Client 

• Building IDF Environment:

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• Ubuntu and Debian:

• sudo apt-get install git wget flex bison gperf python3 python3-pip python3-setuptools

• sudo apt-get install cmake ninja-build ccache libffi-dev libssl-dev dfu-util libusb-1.0-0

• mkdir -p ~/esp

• cd ~/esp

• git clone --recursive https://github.com/espressif/esp-idf.git

• cd ~/esp/esp-idf

• ./install.sh

• . ./export.sh

ENDING Build ESP32-IDF Environment

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Clone OPC-UA Project & Building

• cd ~/esp/esp-idf/examples/
• git clone https://github.com/leonvita91/OPC-UA-SERVER-with-BME280-DHT22-Ethernet-POE.git
• cd opc-ua-with-bme280/
• idf.py build
• idf.py flash && idf.py monitor

NOTE: Connect your ESP32 with USB and Ethernet Cable to get (IP,MAC)

{- CAUTION !! -}

{-Dont Connect the ESP32 Board With USB and POE Ethernet in the same Time this will cause reverse electricity to your PC-}

{+ Please Connect Usb with cable without POE when you doing Monitoring OR Connecting POE Ethernet without Usb +}

ENDING Build OPC-UA With Flashing ESP32 Board

Extra_setups

The Extra Setup include :

• add new nodes.
• editing OPC-UA buffer.
• editing idf.py menuconfig settings.

Please Check the link below for extra_setup.md

• https://gitlab.hzdr.de/alqase03/opc-ua-with-bme280/-/blob/master/Extra_Setup.md

Problems We Had Solved

• Ethernet Driver cmbahadir/opcua-esp32#37

• emac no mem for receive buffer cmbahadir/opcua-esp32#42

Reference

• The Orginial Code https://github.com/cmbahadir/opcua-esp32
• ESP-IDF HomePage https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/
• BME280 sensor https://github.com/yanbe/bme280-esp-idf-i2c
• Ethernet Driver https://github.com/OLIMEX/ESP32-POE
• Athene Wiki https://athene.fz-rossendorf.de/fwk/Datentechnik:OPC-UA/ESP32_POE

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{+Inspiration and Thanks!+}

• Paul Petring, I appreciate your consideration/guidance/help/time. With your guidance and support,Thank you for sharing your wisdom and knowledge with me when I need it. [email protected]

• Paul schwanse, I'm humbled and grateful for all your support,Thank you for your assistance/consideration/encouragement/guidance/support/thoughtfulness/time. [email protected]

• Finally, Many thanks for Helmholtz-Zentrum Dresden-Rossendorf giving me this opportunity.

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