Recent content by Edward_

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    Testing a 32-Input module with Modbus Master Sim & Arduino, beginner advice needed

    This is the code I am testing now, but the result is all Zeros regardless of input state, same result as the original poster of this question. It its based on this ModbusRTU.h example. see my post here EE on Stackexchange
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    Testing a 32-Input module with Modbus Master Sim & Arduino, beginner advice needed

    Wow...
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    Testing a 32-Input module with Modbus Master Sim & Arduino, beginner advice needed

    I'll have to learn a bit about ArduinoRS485.h and the Modbus library requirements it looks like. My RS485 is coming from one of these:
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    Testing a 32-Input module with Modbus Master Sim & Arduino, beginner advice needed

    Thanks jschulze I'm anxious to test the kitchen sink example, it compiles, and I'm trying to transition it to an Arduino Nano I have been using with this test. But, I have been using SoftwareSerial.h to create a second port with pins 2 & 3 for my serial to RS485 adapter, and I'm not quite sure...
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    Testing a 32-Input module with Modbus Master Sim & Arduino, beginner advice needed

    Thanks jschulze. I have it working in Radzio! now. I'm looking for some example code for Arduino, the Modbus master.h libraries (examples) I have looked at leave a lot of unanswered questions in the area of reading holding registers, function 03, and basic configuration. My first step is to...
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    Testing a 32-Input module with Modbus Master Sim & Arduino, beginner advice needed

    Looks like the Radzio! Modbus Master Simulator is only sending frames like: "<tx>0x01 0x02 0x00 0x00 0x00 0x0A 0xF8 0x0D </tx>" But this 32-Input module will only respond to the 03 Read function, not 02 function.
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    Testing a 32-Input module with Modbus Master Sim & Arduino, beginner advice needed

    This seems somewhat straightforward, but maybe it is not. I'm experimenting with a 32-digital Input module, said to have "MODBUS RTU 03 06 command control mode". See attached. I have it working (somewhat) using a simple Arduino sketch, verifying this example: Using the Arduino, the RS485 is...
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