Автор статьи
Andrey Fedorov
Category Archives: IT tools
Inexpensive RS485 module with ESP32 (hardware serial)
In the previous article, I reviewed how to connect very cheap RS485 module to the ESP8266. Generally speaking, it’s MAX485 chip without any protection against troubles like lightning and cost about 0,3 $ It’s better to purchase wholesale by 5 … Continue reading
How to work with ThingSpeak.com on ESP8266? Code examples.
There are a lot of different cloud services in the Internet working as a storage to accumulate telemetry data from IoT devices. It’s quite comfortable services. You don’t need to spend some time to install a server to collect data … Continue reading
RS-485 shields for Arduino
There are a lot of different variants of RS-485 shields for Arduino: https://www.waveshare.com/wiki/RS485_CAN_Shield https://www.tinyosshop.com/arduino-rs232-rs485-shield https://www.dfrobot.com/wiki/index.php/IO_Expansion_Shield_For_Arduino(V5)_(SKU:_DFR0088) https://www.hwhardsoft.de/english/projects/rs485-arduino/ Example of using the shield with Modbus RTU termo sensor. Example, how to work with not expensive Arduino RS485 Shield ordered from Aliexpress.
4-x relay board C0135 managed by Modbus RTU protocol (RS-485)
To test a device management by Modbus RTU commands, we use the circuitry of 4 relays controlled by the STM8S103 controller. (Relay MCU 4-way relay-communication board (RS-485). I used RS485 to USB adaptor to connect to the relays board. Manage … Continue reading
Inexpensive Modbus RTU to Modbus TCP Elfin EW-11 Wi-Fi converter (RS485)
Modbus RTU (RS485 interface) to Modbus TCP converters from the top producers like Moxa, Advantech, Schneider, ABB and etc. are quite expensive. Of course, the quality and reliability of these industrial devices are really very high. Sometimes the most important parameter … Continue reading
How to connect .NET application to OTRS web service
Since the official WSDL file had published on GitHub doesn’t work with .NET applications, I try to found how to fix its. Thanks to Andrey Antipov who helps me found some mistakes and colleagues from OTRS forum. Connection from .NET application to OTRS web … Continue reading
Posted in IT Recipies, IT tools
Tagged .NET, C#, OTRS, OTRS integration, OTRS Web Service, OTRS WSDL
Leave a comment
Working with InstallShield Limited Edition
Relative path in InstallShield is not so easy to use. Try to use such hack in Install Shield configuration file (*.isl). Find section <table name=”File”> where located links to all files which are included in installation package. Then use prefix … Continue reading
Posted in IT Recipies, IT tools
Leave a comment