Controlling a device from a web browser may be easier than you think.
Project tutorial by Homer
Transfer the input signal through the Internet.
Make a converter that transform data from Serial to Wi-Fi/Ethernet and vice versa, by using Arduino.
This video tutorial shows you how to program line by line.
Project tutorial by phpoc_man
Remotely control door via web with pattern password protected. Your door is securely controlled from anywhere through Internet.
Voltmeter can measure voltage up to 50VDC. It automatically calibrates when voltage of power supply is unstable.
Project tutorial by IoT_hobbyist
Well, technically, yes. If the sensor doesn't use a very specific interface, then you probably can connect it with Arduino, but that may require some additional effort.
It isn't clear to me which role does the ATMEGA play in your scheme, so I can't say anything about it. Anyway, almost everything is possible, the question is just how much does it cost to you to make it work :D
Well, a flow sensor, an LCD screen, and 2 Arduino boards are needed of course. You will need one RF receiver and one RF transmitter module.
Never done that before, but I guess it will be kind of:
Flow sensor --> Arduino #1 --> RF transmitter -----------> RF receiver --> Arduino #2 --> LCD
That's probably all the hardware stuff you need.
Of course you can. You will need to make an Arduino board as RF transmitter, and the other as RF receiver, using RF modules. Then you can send the data between Arduino boards and display it on an LCD screen.
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