hi Stefan, Thank you. I am looking at the 4x series too. Mainly the 45, do you have a way of checking accurately the temperature ? Data sheet here if anyone else interested: https://sensirion.com/media/documents/33FD6951/63E1087C/Datasheet_SHT4x_1.pdf I might have to ask nicely see if we can get a m...

Hi Stefan.

I have been looking at those development kits also.
Are you using the humidity - what's the accuracy like ?

Got a idea lurking for a data logger for our binder climate chamber

Steve

Hi Iain, Just seen this post, I can remember years ago Elektor made a test pattern generator. I Think this is an updated version the project not sure if the original one is still around for download https://www.elektormagazine.com/magazine/elektor-200011/16880 or the old 1993 issue ? https://www.ele...

Hi Seokgi, I am not around much next week. you said in your original post "HMI : Serial_3 : Modbus RTU via RS-232(1ea)(Slave)" and that it does not work on the HMI. are you using RS232 for this ? - i have no experience using modbus over RS232, as far as i have seen they are either RS484, L...

Hi Seokgi, Testing every slave individually results in very slow reads. Two slaves cannot be read. If I read it with another computer program (Modbus Poll), a Time Out error occurs at the 7th Device, but the value is read. Are all these tests carried out with your program or away from this ? was thi...

Hi Seokgi, i Would try the following: do an update on your flowcode, make sure that you are using the latest component's. (just in case) Have you tried the 1 second flasher, to check if your clock settings are correct ? Double check your slave addresses make sure you don't have any duplicated addres...

Hi Seokgi,

Can you supply more detailed connection information and your flowchart so we can assist you further.
It is difficult with the information you have provided

Hi Seokgi,

Device : Serial_1 : Modbus RTU via RS-485(7ea)(Master)
Device : Serial_2 : Modbus RTU via RS-485(5ea)(Master)
HMI : Serial_3 : Modbus RTU via RS-232(1ea)(Slave)

you cannot have 2 masters on the network, is this a typo or do you have 2 masters ?

Hi MJU20

This may give you some additional pointers

https://www.galsys.co.uk/news/what-is-n ... -protocol/

Steve

Hi MJU20

This may give you some additional pointers

https://www.galsys.co.uk/news/what-is-n ... -protocol/

Steve