The program with compiled Python library, you will find here. Lucikly, the second library works perfectly (inside the library you will find the code responsbile for assign high prority fot this task). First of all - there is small mistake in for loop (some bits are omitted), secondly - Raspbian is not Real Time OS, so counting time on the level of μ seconds without any prioritization of threads makes that reading values from DHT11 is highly error-prone. Kepware provides a portfolio of software solutions to help businesses connect diverse automation devices and software applications and enable the Industrial. However, I recommend to use the second one, because the first one is not working. Contact a Kepware representative at +1 888-KEPWARE (537-9273) x208 or About Kepware Kepware is a software development business of PTC Inc. Hi EveryoneAnyone knows a OPC Server to comunicate with Siemens Logo 0BA6 or 0BA8 version I tried Kepware with configuration to S7-200 and Simatic Manager too, but unsuccessful. I found two Python libraries that enable to read data from this sensor: In my example, Raspberry Pi works as a Modbus TCP Gateway that transfers data about temprature and humidity. Values = context.getValues(register, address, count=5)ĬtValues(register, address, values) In this line, the current values are retrieved: The function that is responsible for udpating the Modbus memory - context - is called "updating_writer". In this programme, server updates their registers you will find here: To make it easy, I've based my code on the example from pyModbus. Finally, we can look at Modbus TCP Server.
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