We provide PLC based systems that use an HMI that offers telemetry features using an Ethernet connection. Historically we have used an-site modem with a dedicated internet connection with a fixed IP address. That allows us to connect to the HMI remotely very easily. We have some systems are in place and have access to existing internet connections that are used by others, and do not have static IP addresses. Obtaining a new dedicated internet line with fixed IP is challenging and an obstacle we would like to avoid in these cases.
We are looking for someone to provide us hardware details and software if needed for a device to perform this task. We want to have sufficient information to duplicate this many times over, but need someone to get us the required hardware/software for the first one.
We have ethernet-capable equipment located in remote areas needs to be accessible remotely via the internet without requirement for static IP. We need a lower cost device to act as a modem and ability to use basic internet connection (with appropriate firewalls removed). Hardware & software cost for additional units less-than $100 each.
I'm envisioning a small PC with Windows OS that has a USB port and an ethernet port (Raspberry Pi?)
USB port would be for connection of a cellular modem such as AT&T Beam.
Ethernet port would be connected to a "dumb" ethernet switch and perform typical WAN/LAN routing management including port forwarding, VPN, and dynamic DNS (or recommend better).
On the LAN typically are 2 devices each with 3-6 ports forwarded including webserver, FTP, and others. Without a static IP, we need to be able to connect to these devices via Internet (using dynamic DNS or ???). We would prefer ability to connect both with OR without a VPN served from this unit.
The PC itself needs to be remote-accessible (prefer via Chrome remote desktop) and must re-start itself and all required software after power loss. Also ability to auto-reboot on a timed basis (re-boot every day at midnight) so that if failure occurs then then hopefully it restarts automatically, without physical access to the PC.
With the same unit, we also need option to connect via WiFi or land-line internet in lieu of the USB modem (where internet is available, but not cellular) again without static IP. Perhaps WAN ethernet is then connected at the ethernet switch, or requires additional device(s) ??? Please recommend.
Not critical, but also preferred is a processor, RAM, and OS capable of running software designed for Windows 7 32-bit (or better) requiring about 4 GB RAM and an extra 5-10 GB hard-drive space.
Our intention is that once the first unit is designed & programmed, then in the future we would replicate it by purchasing the hardware & software for less-than $100 and then install/upload this same configuration onto each unit in-house. For this reason any licensed/proprietary software is not preferred (unless within cost) and subscription-based software is not acceptable.
Scope of work:
The first step is to provide a basic proposal of hardware & software to use.
We will then obtain & configure the unit for this task.
The final step is to provide instructions, install files, etc. as required that we can easily copy the same configuration onto future additional units. Full payment for project will be made when we get the first unit operational and functional.
Please ask any questions you have, we are trying to be as detailed as possible, but are certainly open to suggestions as to what you might think will work best. At the end of the day, we need a functional and repeatable system.