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This article will explain in detail how to use Arduino to develop irrigation system. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

Arduino to save.

Arduino is ideal for projects that are low-cost, require only one power supply, no system will freeze / hang, and have a large number of standard peripherals. It sounds like this idea is suitable for me, so I searched the Arduino GSM module through the Internet. *, I found that a module and an open library cost only $30, which is very cheap. The complete system costs about $50, in sharp contrast to the $700 cost of most other systems.

Fortunately, GSMLib is easy to use, and as soon as I find out which pins can be used and which are not, I start to do it. As a short example, when a certified mobile phone number sends you a text message, what you need to do is:

Stat = call.CallStatusWithAuth (number, 1,3); if (stat = = CALL_INCOM_VOICE_AUTH) {call.HangUp (); sms.SendSMS (number, value_str);}

System description

The final pump control system is quite simple. The method of starting or closing is realized by one relay or two relay system analog on / off buttons. What I want is to support both methods, which is not very difficult.

In addition to the output, there is also input. When the system is up and running, the corresponding relays are turned on and off; when there is an error (power outage, low voltage, high temperature), three relays may be turned on. Our software generally needs to send text messages, and when the system starts and stops (for any reason, whether you turn on the system over the phone or not), when an error relay is triggered, a text message with the specific cause of the error will be sent.

We also want a way to cancel SMS sending, and to make sure you don't get unimportant messages if you turn the system on / off manually and you're next to the pump (obviously, when you're standing next to the pump, turn off the pump, the pressure goes away, you no longer need to receive text messages) turn on or off SMS by simply selecting input.

Of course, there are some minor issues to consider, such as the error relay is not associated with other components (when the power is turned off, all other error relays will continue to operate, so you just need to send a "power loss" message). The error condition is specific to the error (for example, shutting down the system triggers a "pressure drop" error), but this is very simple.

Realize the wrong SMS

The function that implements the error message takes only a few lines. Initially, we detect whether the state of the relay has changed (when an error relay remains active, we want edge triggers to avoid false loops. For example):

For (char iTuno; I < INPUT_LENGTH; iPins +) {pinState = digitalRead (inputPins [I]); if (pinState! = pinStates [I]) {/ / If the pin's state changed, note it. StatesChanged [I] = 1;} / / Update the state. PinStates [I] = pinState;}

Then we have mastered all the state changes and new states, and it is not difficult to decide what to do next:

/ / Decide what happens.if (statesChanged [0] = = 1 & & pinStates [0] = = OFF) {/ / Phase dropped, send message regardless. SendSMS ("Phase dropped.");} else if (statesChanged [1] = = 1 & & pinStates [1] = = OFF) {sendSMS ("Thermal dropped.");} else if ((statesChanged [2] = = 1 & & pinStates [2] = = OFF) & & (statesChanged [3] = = 1 & pinStates [3] = = OFF)) {/ / Pressure dropped * and operation stopped simultaneously*. / / This is because we don't want to be notified of normal / / pressure drops after we stop the system ourselves. SendSMS ("Pressure dropped.");} else if (statesChanged [3] = = 1 & & pinStates [3] = = OFF) {sendSMS ("Pump shut down.");} else if (statesChanged [3] = = 1 & & pinStates [3] = = ON) {sendSMS ("Pump started.") } this is the end of the article on "how to use Arduino to develop irrigation system". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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