i am trying to connect a plc to the internet via the arduino or possibly the raspberry pi. does anyone have any ideas? I thought about trying to get it done on the cell network sense the plcs will be in remote areas.
How do you communicate with the PLC ?
I wonder is the Arduino necessary?
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once setup and running we would normally use a sixnet modem, but want to cut costs and design our own solutions we would communicate via ethernet through the pi or arduino to the internet through cellular adapter or hotspot.
majorkuso:
once setup and running we would normally use a sixnet modem, but want to cut costs and design our own solutions we would communicate via ethernet through the pi or arduino to the internet through cellular adapter or hotspot.
This sounds very like the problem in another current Thread - which I can't find right now.
I have no idea what a sixnet modem is. If it is a device that is connected to the PLC with an RS232 cable then I imagine that an RPi could do the same without needing an Arduino.
You need to provide a clearer description of what you are doing right now, and what you want to do in the future.
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I want to connect the ethernet of the plc to a cellular hotspot module so we can access the plc over the internet anywhere there is a cell signal
If I can I would like an embedded design around arduino.
@majorkuso, you have not responded to the last paragraph in Reply #3 and without that information I can't help you.
Your comment in Reply #5 is a bit like saying "I would like to visit somewhere" without any details about a destination, how might get there or how you might pay for the trip.
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We want to connect to a plc in one state from anywhere in the country through verizon, att, etc by routing traffific from mobile hotspot to plc and back out through hotspot.
Did you read the last paragraph of Reply #3? - did you notice the bit about "what you are doing now" ?
Did you read the middle paragraph of Reply #3? Have you any comment in response to it?
I am not going to repeat myself again.
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I appreciate the help but, right now we are using a serial modem I have a raspberry pi that i could setup as a bridge,but it may not be ideal in a production environment as an avr or arduino would be especially power wise and or availability, but cost effectiveness not sure as of yet the arduino or avr can be designed in house pcbs etc.
I want to connect the ethernet of the plc to a cellular hotspot module so we can access the plc over the internet anywhere there is a cell signal
Buy a mikrotik routerboard with a USB port, atach a 3G modem to it, setup a dyndns or enable cloud option inside routerboard and create a VPN L2TP, PPTP,openvn ...
Simple and secure and very cheap (routerboard 951 2hnd)http://www.amazon.com/Mikrotik-RB951G-2HND-5-Port-Gigabit-Wireless/dp/B00EQWUZM6
This way you provide security and it is a professional solution.
@majorkuso, I don't mean to be unkind, but I get the impression that you are not familiar with programming.
If that is true then I suggest you hire a professional to advise you. PLCs are usually in charge of expensive or valuable industrial processes and you don't want to screw that up.
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I have the raspberry pi setup as a bridge, but I would like a better embedded ic components. the App processor can go to -70 c is fine but the lan ic is lacking in temp range of 0c. I will look around for different mcus and ics for the design I asked here because I knew the community was active and helpful.
@majorkuso, you seem to have an uncanny ability to Reply without ever answering questions. I have no sense that you are participating.
Wherever you go for help you will have to engage in a dialogue with the person who tries to help you. Repeating the same generalities over and over again is not the way to make progress.
If I have said things that you don't understand you need to tell me.
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No
I understand what you are saying, but I am not getting anything that is close to an answer except for what Hugo said, that could be an option but I need the parts to withstand going below 32 degrees F, I was asking If anyone knew of any chips that could handle the requirements and if possible an example of a library or libraries that could be used with bridging the two interfaces.
It seems I am not able to communicate effectively with you so I can't see what else I can do to help.
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