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Messages - support

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Modbus Server / New Modbus Server(TCP) and Slave(RTU) application
« on: September 08, 2022, 12:05:14 pm »
Modbus Server has been completely re-written using the latest Apple SDK and Network Framework.
Unfortunately it was not feasible to accommodate the new features in the old version so we have now created two new applications:
  • Modbus TCP Server
  • Modbus RTU Slave (to be published soon)
Splitting the RTU and TCP functionality has come as a result customer confusion with the server/client (TCP) and master/slave (RTU) terminology. We re hoping the new terminology leaves no room for confusion.

Link to Modbus TCP Server:

EchoHam / Re: Firewall or Router Configuration Error
« on: September 08, 2022, 11:53:44 am »
The error message states:
"other stations won't be able connect to you"

It it trying to tell you that, when you have EchoHam running, another station might not be able to contact you.

Can you please clarify if you have been successfully contacted by another station?

Modbus TCP Client and RTU Master / V1.00 Released
« on: July 13, 2022, 08:37:08 am »
V1.00 is now available in the AppStore:
Modbus TCP Client
Modbus RTU Master

Demonstration video:
TCP Client:
RTU Master:

Please post any support questions in this forum.

NavPredict / V1.00 release
« on: May 12, 2022, 04:04:22 pm »
V1.00 is now released in the Appstore
Appstore link:
Introduction Video:

EchoHam / Re: Favorites?
« on: April 06, 2022, 10:00:38 pm »
This is on the feature list

Ham Rotator / V1.0 released
« on: April 01, 2022, 06:15:35 am »
V1.0 is now available in the App Store.
Supported Protocols: SPID ROT2, Yaesu, Easycomm, DCU1.
Please contact if you would like to see another rotator protocol.
Short video introduction:

Modbus Client (Pro) / Re: Unable to purchase Pro
« on: October 01, 2021, 07:55:54 am »
The pro version is no longer available and has been removed from the AppStore.
All features of the previously available in the PRO version are enabled in the standard version.

Serial Tools / Re: feature suggestion for serial tools
« on: September 21, 2021, 01:21:35 pm »
Hi dumpington,
thanks for the feedback.
you are not the first user to come up with this suggestion.
It is already on the feature request list and will be implemented eventually.

Unfortunately time is limited, but I will get to it eventually.

Modbus Client (Pro) / Re: How to set the port number to 502?
« on: April 24, 2021, 09:20:08 am »
Prior to macOS V10.14 (Mojave) all ports below 1023 require root privileges for full access. A workaround solution is explained in the ModbusClient Help section.
From 10.14 onwards this restriction has been removed and you can simply set the port number to 502.

Modbus Client (Pro) / Re: How to read MODBUS register
« on: April 24, 2021, 09:08:01 am »
0x0FFD = 4093
If that doesn't work try +1 and -1, i.e. 4092 and 4094

Register addresses can be 0 based or 1 based, depending on Modbus device, hence try the addresses either side of 4093

Hope this helps

EchoHam / Re: EchoHam 2.13 on Big Sur
« on: December 05, 2020, 06:56:12 am »
EchoHam has not been tested on Big Sur and I would expect it not to work.
Unfortunately the Audio interface on Big Sur has been completely changed and is no longer compatible.
All audio related code needs to be completely re-written for Big Sur.
I'm hoping the Christmas break will allow me time to tackle the rewrite.

EchoHam / Re: EchoHam 2.13 Connection Issues
« on: October 28, 2020, 08:45:20 am »
proxy connections are only partially implemented in V2.13. However, I have tested connection to public proxy servers and they do work.
You can find a list of public proxy server at
Find a suitable server and enter the details in Echolink.

EchoHam / Re: EchoHam 2.13 Connection Issues
« on: July 16, 2020, 05:33:53 pm »
Arandolp, what's your call sign?

EchoHam / Re: EchoHam 2.13 Connection Issues
« on: July 15, 2020, 07:57:03 am »
Hi Phil,
many thanks for sharing your solution.

I have removed "El Capitan" from the subject name as the problem wasn't really related to El Capitan but EyeConnect and hence your solution would be applicable to other macOS versions.

EchoHam / Re: EchoHam 2.13 Connection Issues
« on: July 14, 2020, 08:48:46 am »
Thanks Phil,
it may be El Capitan or something else which is installed on your computer.

It would be great to hear from other users if they have the same issue with El Capitan.

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