https://community.element14.com/technologies/industrial-automation-space/ en-USTelligent Community 12https://community.element14.com/technologies/industrial-automation-space/f/forum/57027/e14-community-recommendation-for-modbus-tcp-client/238612Fri, 09 Oct 2026 21:08:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:3c036e40-0764-4431-b2ab-3ef7d9b32866colporteurI have a poor relationship with the vendor. When you: make promises and don't deliver. Make mistakes and not own up to them. Make mistakes and blame someone else. My patience wears thin. I explained to the owners that it is not a good idea for me to deal directly with the vendor. It will not be good for their relationship. I am only part-time. They need to vendor long after I am gone. I can call out two or three times where the vendor has had issues and immediately suggested it was something on our end. At one point I released some scripts to track network performance. The scripts discovered a security hole, they said was never there. Eight hours after giving them my data to prove our network performance was not the issue my scripts failed. They fixed the security hole that never existed. No word said. There was one line in the scope of work incorporating the modbus interface. Nothing more. The implementation of the ERP system has taken way longer than originally planned. The modbus interface is one of the final pieces. At first they wanted the scales to port flap on the edge of the network. Not happening on my watch. Through the jigs and reels they settled on OpenVPN. Between the dev environment (my home basement) and production environment I established the OpenVPN connection, the firewall and the routing to fully test the environment for the scales. It works. Thanks in part to the help from E14 community. The vendor doesn't use OpenVPN in their dev environment. I had to create last minute L2TP VPN tunnel so they could do development work on the scales. They struggled with that. Frustrated that password and secrets were not sent in emails but secure links. They had never worked with the scale before. They continuously told me in emails OpenVPN would not work. It was unstable, prone to resets. I assured them it was working and stable. They requested all my documentation before they would start development. Like me, when I began this post, I believe they didn't have any knowledge of modbus. I gave them a test procedure that I had developed. The software and the test tools provided them insight into what they needed to do. Three days after they started development they indicated the requirement for a PC. I have little details on the PC re-design. I am also not looking to get involved because I truly believe I would own it. Today I'm established a test laptop in the environment. I working through all the issues to meet requirements to ensure the network remains secure. I hope to turn over to them a PC that I know is on a good footing. Then we scrap over what they want changed to get it working. I am biased. I have little confidence in the vendor. They are sweet as apple pie when they want something but will dump all over you when given the opportunity. Take what I says with a grain of salt.https://community.element14.com/technologies/industrial-automation-space/f/forum/57027/e14-community-recommendation-for-modbus-tcp-client/238607Fri, 09 Oct 2026 12:24:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:052983c1-05bf-4b76-872e-515c16195e7aobonesI would be very much interested in knowing what changed their mind towards what we suggested as safer four months ago.https://community.element14.com/technologies/industrial-automation-space/f/forum/57027/e14-community-recommendation-for-modbus-tcp-client/238606Fri, 09 Oct 2026 12:21:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:26c0ef51-b569-479c-bd17-de882bdbc4a2colporteurThe vendor doing the development (i.e. getting modbus data into the ERP) has modified their solution. Original plan was to reach into the scales and pull data. They now require a PC in the same subnet as the scales. The PC will run a service that will pull the data from the scales and push it to ERP. I am waiting for a response to an email asking for more details.https://community.element14.com/technologies/industrial-automation-space/w/quiz/72113/do-you-know-your-way-around-industrial-automation-like-a-robot-in-a-factoryFri, 09 Oct 2026 09:02:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:6663fe2e-ad43-4348-9691-f3277cc6715cOwainMTest your knowledge on how manufacturing environment machinery communicates, motivates and navigates in our new quiz! Whether you’re driving your first stepper motor or equipping 6-axis robotic arm with 9 degrees of freedom, this quiz will stretch your knowledge. We’ve also included some handy resources to help you along the way. 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For more information, click here. community.element14.com/.../T_2600_C_2D00_AnalogDevices_2D00_IndustrialRobotics_2D00_Quiz09102026.pdfadiADI-e14robotindustrial automationManufacturing environmentindustrial roboticse14https://community.element14.com/technologies/industrial-automation-space/f/forum/57027/e14-community-recommendation-for-modbus-tcp-client/238586Wed, 07 Oct 2026 16:25:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:b10c797b-b88f-4e0a-a382-a934eb4f7c94SensoredHacker0ah sorry to hear thats not done yet. cms-prod.ricelake.com/media/yj4d03hi/m_156782_1280_modbustcp_enus_revh.pdf that has a register map / controls / command list. page 13 and on. Ill look at making you a test script this evening maybe. if in between, now, and then, you say a little more detail about the steps in the process, like how the process goes, I can try to blast out a test script to get you your data. what happens after that , where it goes, will be up to you.https://community.element14.com/technologies/industrial-automation-space/f/forum/57027/e14-community-recommendation-for-modbus-tcp-client/238557Mon, 05 Oct 2026 16:54:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:3fecdfd9-3f60-4086-bbd3-eecd91e25ac4colporteurScreen is touch, that is about the extent of my knowledge. It has network capabilities but we currently are not using it. The objective is to extract the scale data and move it to our ERP system.https://community.element14.com/technologies/industrial-automation-space/f/forum/57027/e14-community-recommendation-for-modbus-tcp-client/238546Mon, 05 Oct 2026 13:11:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:70762e89-97fe-41d1-8b0c-25a7ed04de24SensoredHacker0oh its an embeded linux web server with IO! maybe ill see one cheap on ebay and really have at the thing at 4K$ new, ain no way.https://community.element14.com/technologies/industrial-automation-space/f/forum/57027/e14-community-recommendation-for-modbus-tcp-client/238545Mon, 05 Oct 2026 12:59:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:eb735431-7698-44ec-9841-cb808c62f1abSensoredHacker0I'll necro post. pymodbus tcp typically does fine. My boss showed me another library recently that seems to work well... bu t I forgot what it is called. typicaly, I start with a register map, then build out functions from there. dealing with modbus kinda sucks. I typicaly build lists, or arrays, while my co-workers seem to like json files. thats a design choice, I favor application development, where they favor web development, though either could work. A specific application? lol IDK about that, I would just write it. out of curiosity, its that a touch screen? is button IO writable? can you push (load) different screens remotely? what is the display graphics programed in? are there other interfaces for programing the display?https://community.element14.com/technologies/industrial-automation-space/f/forum/57027/e14-community-recommendation-for-modbus-tcp-client/238483Wed, 30 Sep 2026 20:32:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:4d4a343c-33d7-4eec-b6f5-e0d942864168colporteurSorry folks I am not necroposting. I recently found a Modbus resource tool that would have been ideal in this project. Command line console for modbus. I can try and remember it for the next time or put it in a place I do remember. https://github.com/utilsec/Modbus-Swiss-Army-Knife The name of the link should tell it all. I tried it with my scale project and discovered that via packet sniffing, it does a lot of communication when it first fires up. If the end point is missing (i.e. typed in wrong IP) the software doesn't start. If there is a modbus device a text screen appears.https://community.element14.com/technologies/industrial-automation-space/f/forum/57219/mis-using-rs-485-interfaces-to-generate-audio-and-visual-alerts/237978Sun, 30 Aug 2026 16:51:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:a4104352-ea46-4c59-a4e8-f63b62e448fckmikemooshabaz Sounds pretty clever to me. Simple is hard. Well done. ☺https://community.element14.com/technologies/industrial-automation-space/f/forum/57219/mis-using-rs-485-interfaces-to-generate-audio-and-visual-alerts/237963Sat, 29 Aug 2026 18:49:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:0d45f6d1-4c68-40d8-9f22-1d1082b6c3b0DABGood hack.https://community.element14.com/technologies/industrial-automation-space/f/forum/57219/mis-using-rs-485-interfaces-to-generate-audio-and-visual-alerts/237954Fri, 28 Aug 2026 14:44:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c8055049-11cd-43cb-8da5-bc08540abeaeQbitClever hack! Using Driver Enable alongside the TX pin to leverage the high-impedance state is a really smart way to independent-control two loads without needing to tear open the enclosure.https://community.element14.com/technologies/industrial-automation-space/m/managed-videos/151657Thu, 27 Aug 2026 21:00:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:64aab3db-000a-4673-8ece-b188e526be3ashabazhttps://community.element14.com/technologies/industrial-automation-space/f/forum/57219/mis-using-rs-485-interfaces-to-generate-audio-and-visual-alertsThu, 27 Aug 2026 20:58:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:09affcd5-0bb9-4ebe-af2c-fd08f57e55f5shabazI did a bit of a hack today : ) I have a Pi Pico, attached to an RS-485 transceiver. As you're maybe aware, the RS-485 transceiver converts the UART signal into two signals, called A and B, or Non-Inverting and Inverting. The oscilloscope trace below explains this. What's not shown is that the A and B outputs are often only enabled if requested to do so by applying a logic high on a Driver Enable (DE) pin. If the DE pin is low, then the A and B signals will no longer output a signal. I had a request from a friend to control an LED and a little audio tone beeper from the Pi Pico. Sometimes he wanted just the LED to light, sometimes just the beeper, and sometimes both. He doesn't need RS-485. I initially considered opening up the device and wiring things up to spare GPIO pins internally. However, after thinking some more, I realized I could just repurpose the RS-485 connections, as shown in the video: community.element14.com/.../20260827_5F00_211338.mp4 To get this to work, all I needed to do was a software mod, to change the Pi Pico UART Tx pin to become a normal GPIO configured as an output. Then, the logic was simple: Driver Enable (DE) UART TXD RS-485 A,B 1 0 Low, High 1 1 High, Low 0 0 HiZ, HiZ 0 1 HiZ, HiZ I wired the little beeper to the A connection, and the LED to the B connection (use series diodes and resistors as required to reduce the voltage or current if needed), with the other end of each connected to 0V (ground). I cannot turn on both the LED and the beeper simultaneously, but that's not a big deal, the code can just alternate every second as shown in the video. I'll encase this in moldable plastic (PolyDoh) , that will be good enough for the particular use-case. Not a very clever hack, but it did save me some effort! Thanks for reading.rs-232hackrs-485rs485rs232