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As I said, I won't be able to provide much help with the WinCE side of things or how to run an app on real hardware, but regarding the Modbus library, I think you'll need to find a different Modbus library besides EasyModbus that targets the .NET compact framework. Have you tried doing an...

First, take a look at this thread to understand the different conventions used for Modbus register numbering: https://control.com/forums/threads/modbus-register-numbering.49844/ The 30,000 offset may simply indicate Input Register. So for example, 30103 may be Input Register 103. Try entering...

In order to read all registers from a Modbus slave, you first need to know what registers exist on the slave device. This can found in the slave device’s register list, which is typically included in the device’s user's manual or is a stand-alone document provided by the manufacturer. What is...

For the software you're using as the Modbus master, the answer to your question is yes. But for your slave, it seems the answer may be no, as your slave seems to not support some registers in the range 2251 to 9487. Instead of replying with an exception response, your slave is not responding at...

I'm sorry, but I don't think i can help you any further on this. WinCE is far outside my expertise. Perhaps another member that has experience with WinCE can help you. In the meantime, I recommend searching the internet for examples and "Hello World" style tutorials you can follow for...

This is primarily an English forum, so for the sake of viewing this thread in the future, I've added the English translation using Google. Now to answer your question, I recommend using MQTT. This is probably the most common, standardized protocol used for cloud communication. Details on MQTT...

On the login page, you'll see, "Forgot your password? Click here." Click the link and I believe you should receive an email to reset your password.

It's hard to help with so little details, but assuming this is a Modbus RTU device, you could use Chipkin's CAS Modbus Scanner to discover the sensor's address (which is done by polling all possible addresses until the slave device responds)...

A Google search reveals that this may be possible, but with limitations, as Windows CE uses a .NET compact framework, as opposed to the full .NET framework used on your Windows PC...

You need to look at the API documentation for EasyModbus to determine the proper values and arguments for the properties and methods. The documentation is available here: http://easymodbustcp.net/en/modbusclient-properties http://easymodbustcp.net/en/modbusclient-methods You can also find code...

I didn't completely follow all of that, but your BACnet device at 10.128.159.13 (Device ID 19) is acting as a BACnet router. It has a "virtual BACnet network" with network number 19, and the devices with Device ID's 190002 to 190036 are the virtual BACnet devices. I am not familiar with the...

You have a period '.' character at the end of your Form1.vb code after the line "End Class". Delete the period and your code should compile (well actually you're not passing enough arguments to WriteSingleRegister, but you shouldn't be using that function anyway - details below). You're trying...

I am not very familiar with Visual Basic, but as far as I can tell, yes it appears you are on the right track. For the specific bytes to use in your request packets and the device's expected responses, please refer to the Communication Traffic window in Modbus Poll (Display->Communication...)...

Great! I'm glad my recommendation worked.

It appears that you are configuring Modbus Poll correctly, it seems you're just not attempting to write a new value. Try configuring Modbus Poll like you did here: Then select a cell in any row from 0 to 7 and type "1" to change the value from 0 to 1. This should cause Modbus Poll to write a 1.

No, I don't think it's correct. There's one important clarification in the cable length, in that you must consider the voltage drop on both both the positive conductor and the negative conductor, resulting in multiplying your length by 2 to get the total length of the power wires (more on this...

Are you saying your 24VDC power supply is connected in series to each flame detector and gas detector? Are you sure it's not connected in parallel (+ to +, - to - at each device)? I've never heard of connecting power in series (24V supply + to first detector +, first detector - to second...

Great! I'm glad you got it working. The next step is to move on to using a Modbus master tool, such as Modbus Poll or ModScan to read/write Coils 1 - 8 and confirm each relay is responding accordingly. This should work without issues, as the debug tool you are currently using is simply sending...

According to the Vendor ID and Product ID in your images for your USB to serial converter (found using this website https://devicehunt.com/view/type/usb/vendor/1A86/device/7523), it seems your converter is using the QinHeng Electronics CH340 USB chip. I believe this is the manufacturer's...

Yes. Modbus is a standardized protocol. If a product claims support for Modbus, then it should work across different manufacturers. Although, there are certain exceptions to this. For example, not all devices may support the same function codes (i.e. commands). Be sure to check the products'...