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As I'm completely new to openhab, I apologize for any stupid questions in advance.
I'm trying to read my heater via Modbus TCP and getting no response at all.
The device is described here (sorry…
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modbus_new_tcp(), returns NULL and set Error 115, "Operation In progress" on Ubuntu 14.04.4 LTS.
Howewer it works on Windows 8.1
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Hi Stephane,
I am using libmodbus library to read consumer meter data. But I am not an expert in this subject. Pls advice which method I will call first
rc = modbus_set_slave(ctx, idno);
modbus_c…
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Hi Stephane
I used libmodbus 3.0.6 for developing an application in my telecommunication lab, where an automated test suite in perl driven environment sends AT Commands over modbus protocol to my ap…
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It's frequent that some devices aren't Modbus compliant and it's required in this case to use modbus_set_slave() to set the slave ID of the remote device before sending the request (I should add this …
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I am trying to set the serial mode to RS485.
When I run the modbus_get_serial_mode() function, it returns RS232.
When I then try to use the modbus_set_serial_mode(ctx, MODBUS_RTU_RS485); function, it …
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Some TCP devices, like Sentron PAC3200, do not respond to queries with function code 0x03 (read multiple registers) if unit identifier is assigned 255 (0xFF).
Using debug information, error is:
[…]
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Hi, I have olinuxino-a10lime board with 4.1.3 kernel and libmodbus 3.0.5
I use:
modbus_rtu_set_serial_mode(ctx, MODBUS_RTU_RS485);
but nothing happens. DE still on 0 level.
How can I control DE signa…
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Don't know if it is possible: It would be nice to make them configurable somehow.
I know that my controller certainly accepts 56 words after the header (7d/125 in total), however MODBUS_MAX_WRITE_CO…
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I am trying to port some existing C code over to Go using this package but keep getting a `serial: timeout` error on reading registers. I've tried with both `ReadHoldingRegisters` and `ReadInputRegist…