In this article, we will learn how you can use the Arduino leak sensor. Such sensors are often referred to by different names: rain sensor, moisture sensor, drip sensor, leakage sensor. In this case, almost always one and the same sensor is meant, as a rule, made in the form of a ready-made module. The sensor easily connects to the Arduino, the sketch for working with such sensors is simple, the price is not high. Perfect option for simple projects on Arduino Uno, Mega, Nano.
The leakage and rain sensor in Arduino projects allows you to detect the appearance of moisture drops and react in time to this, for example, by turning on an alert. Such systems are actively used in the agricultural industry, in the automotive industry, and in other daily areas of our life. In this article, we will consider working with a ready-made module, which can be easily purchased in any specialized online stores.
The sensor module consists of two parts:
- "Sensor" drop detection board. It monitors the amount of moisture that has got on it. Basically, the sensor is a simple variable resistor, short-circuited by water in different places, which causes a change in resistance.
- The second part of the sensor is a dual comparator (usually LM393, but LM293 and LM193 are possible). His the main task- converting the value from the sensor into an analog signal from 0 to 5 volts.
On the market there are sensor options with both spaced-apart sensor and comparator, and combined on one panel.
The sensor is powered by 5V, which can be easily wound from any Arduino board. Typically, the sensor module has two outputs:
- Analog. The value received by the controller will vary from 0 to 1023. Where 0 - everything is flooded or it is raining, the sensor is very wet, 1023 - dry weather, the sensor is dry (some sensors have opposite values, 1023 - maximum humidity, 0 - maximum dryness) ...
- Digital. Provides high (5V) or low voltage in case of exceeding a certain threshold. The threshold level is adjusted using a trimmer.
Connecting a leakage and rain sensor to arduino
To connect the sensor to the arduino, you need the board itself (UNO, Mega, Nano or any other) and the sensor itself. If you want to check the intensity of precipitation, it is recommended to place the sensor not horizontally, but at a certain angle so that the accumulated drops flow down. 
Wiring diagram of the leakage sensor module to the arduino:
- VCC (power input) - must match for the connected arduino circuit in voltage and current. That is, in this case, 5V;
- GND - ground;
- AO - analog output;
- DO - digital output.
We connect the analog output to the analog pin of the microcontroller, for example, A1. The digital output is respectively connected to one of the digital pins. Voltage can be applied from the 5V pin of the arduino board, ground is connected to ground.
When connecting leakage sensors in real projects, it is imperative to provide protection of the electronic part of the module from moisture penetration!
Example sketch
#define PIN_ANALOG_RAIN_SENSOR A1 // Analog input for the leakage and rain sensor signal #define PIN_DIGITAL_RAIN_SENSOR 5 // Digital input for the leakage and rain sensor signal void setup () (Serial.begin (9600);) void loop () (int sensorValue = analogRead (PIN_ANALOG_RAIN_SENSOR); // Read data from the analog port Serial.print ("Analog value:"); Serial.println (sensorValue); // Output the analog value to the port monitor sensorValue = digitalRead (PIN_DIGITAL_RAIN_SENSOR); // Read data from the digital port Serial.print ("Digital value:"); Serial.println (sensorValue); // Output the digital value to the port monitor delay (1000); // Delay between measurements)In this sketch, we simply read the values from the sensor and output them to the port monitor. Conduct an experiment and check how the measured value changes when you touch the sensor with a wet or dry hand. If the sensor is wet, it has started to rain or a leak has appeared, wiped it with a dry cloth - the rain is over.
Example of a rain alarm project
Let's consider an example using an audible signaling in the form of a connected buzzer at digital output D6. If desired, instead of signaling, you can connect a relay and perform various operations with opening the network. In the sketch, we will transfer the received data to the port monitor via the UART interface.
Sketch for a project with alarm
Below is a test code that activates a sound signal at the already mentioned digital output 6, with a time delay, in order to exclude false alarms in case of accidental water ingress on the sensor. The work is implemented through a variable that is updated every second and acts as a threshold - curCounter. The alarm is triggered when the value transmitted from the sensor becomes less than 300. The delay between moisture detection and the sound signal is slightly more than 30 seconds.
#define PIN_RAIN_SENSOR A1 // Analog input for the signal of the leakage and rain sensor #define PIN_ALERT 6 // Digital output for the alarm #define MAX_COUNTER 30 // Threshold value for the counter #define ALERT_LEVEL 300 // Threshold value for the counter int curCounter = 0; // Counter for collecting "statistics", which increases by 1 every second after the sensor is triggered void setup () (Serial.begin (9600); pinMode (PIN_ALERT, OUTPUT); pinMode (PIN_RAIN_SENSOR, INPUT); // You can leave it blank, since this is the default value) void loop () (int sensorValue = analogRead (PIN_RAIN_SENSOR); Serial.println (sensorValue); // Print the value to the port monitor delay (300); // short delay // If we have accumulated enough grounds for alarm activation if (curCounter> = MAX_COUNTER) (digitalWrite (PIN_ALERT, HIGH); // Alarm activation curCounter = MAX_COUNTER; // Variable overflow protection) // Determine the humidity level if (sensorValue< ALERT_LEVEL){ // В очередной раз убедились, что все влажно, увеличиваем счетчик curCounter++; }else { // Интенсивность дождя не превышает порога digitalWrite(PIN_ALERT, LOW); // Выключаем сигнализацию curCounter = 0; // Обнуляем счетчик } delay(1000); // Задержка между измерениями }
Summarizing
Rain and leakage sensor can be used in arduino to create devices that react to the appearance of moisture in the form of drops. Among the advantages of the considered module, one can note its simplicity, convenience and low cost. The sensor can be connected very easily - using analog or digital outputs. The standard analogRead function (or digitalRead for a digital pin) is used to get the value in the sketch. Using the obtained values, you can turn on an alarm or other external devices using a relay.
Initially equipped with such a useful device as a rain sensor. Thanks to him, the wipers work in automatic mode, as soon as it starts to rain, they turn on themselves, eliminating this task for the driver. Many car enthusiasts who do not have such a system are wondering whether it is possible to install such a system on their own? The answer is yes, of course you can, and this will be discussed in this article.
Even VAZs, for example, VAZ 2110, can be equipped with such sensors.
Features of the operation of rain sensors
When the wipers work when the first position is turned on, the rain sensor monitors the speed of movement of the wipers. In this case, the intensity of glass cleaning depends on it. The harder it rains, the more actively the wipers will work. If the rain subsides, the windshield wipers will also slow down. As for positions 2 and 3, then in this case the wipers will work exclusively at a given speed.
It is important that the windscreen wiping system can be controlled manually. So, for example, if the sensor is installed on the passenger side, then if the glass on the driver's side is dirty, the sensor may not recognize the contamination and will not turn on the wipers. Or it happens that in dry weather the sensor is triggered by no load from beetles or leaves hitting the glass. In this regard, it must be possible to completely turn off the wipers or turn them on if necessary.
Materials and tools for connection:
- a rain sensor of a suitable brand;
- glue;
- self-tapping screws;
- wires;
- screwdriver, wrenches and other tools.
Rain sensor connection process:
Step one. Installing the RS-22 type sensor
In total, the author considers two types of sensors, these are RS-22 of foreign production, as well as a DDA sensor of domestic production.
How to install a sensor type RS-22:
1. The holder for the rain sensor must be glued to the windshield.
2. A special gel must be applied to the sensor body, which will reduce the refractive index of the two working zones.
3. The base of the sensor body is fixed to the base with a self-tapping screw.
4. At the final stage, we check that between working area the sensor and glass were free of bubbles.
Step two. RS-22 sensor connection
Now you can start connecting the electrical part. The sensor is connected to the wiper mode switch.
1. The blue wire of the sensor is connected to the car body, this is a minus.
2. The red wire of the sensor must be connected to the contact marked "I", and the standard yellow wire with a green stripe is disabled.
3. Now the yellow wire from the sensor must be connected to the yellow wire with a green stripe.
4. And finally, the black wire is connected to the block, this is contact "53", for this, the blue wire is used.
In order for the device to start working correctly, you first need to calibrate it depending on the sensitivity and bandwidth glass. The sensitivity is adjusted in such a way that the sensor is triggered when the required degree of contamination or wetting of the glass. You can learn more about how such a sensor works from its instructions.
Step three. Features of connecting the DDA sensor
The domestically produced rain sensor differs significantly from the RS-22 type sensor. The most important thing that can be noted is the low cost of the sensor, ease of installation and the ability to connect without interfering with the main wiring of the car. Also, the system can be adjusted depending on how fast the car is traveling. The faster the car goes, the faster the wipers also work, since the glass becomes dirty faster. Models of sensors such as DDA-25 are installed on Kalina, as well as on Lada Priora. The DDA-15 differs only in the arrangement of the contacts on the relay.
The sensor also has the ability to select a mode; it can work to combat rain, snow, as well as in standard mode.
How to install the DDA sensor
1. First, the sensor holder must be glued to the glass.
2. The next step is to disassemble the car mounting block and pull out the standard wiper control relay. DDA is then simply installed in its place.
3. On the left windshield pillar, you will need to lay wires.
4. At the final stage, it is necessary to adjust the sensitivity of the sensor.
You can learn more about how to connect the sensor in the video.
In this tutorial, we will use a rain sensor to detect rainfall and generate an analogue variable signal from 0 to 1024. It will also generate a digital output according to its setpoint.
When the rain sensor detects rain, it sends an analog signal to the Arduino Uno Board. The Arduino Uno keeps track of the changes taking place on the rain sensor. When the rain sensor value goes beyond a certain level, our Arduino Uno sends some commands to our GSM module and GSM module sends sms to the desired phone number.
Installing Arduino IDE: you can download latest version Arduino IDE on this page.
Step 2. Components used
For this project we need some components:
- Rain sensor / sensor
- GSM module (sim 900)
- Wire / Jumper Set
Rain sensor / sensor
The rain sensor module is a simple tool for detecting rain. It can be used as a switch when a raindrop falls on the sensor, as well as to measure the intensity of precipitation. Modular functions, rain board and control board that are separate for more convenience, power indicator and adjustable sensitivity, potentiometer.
The analog output is used to detect drops in precipitation. When connected to 5V power supply, the LED indicator is on, when there is no rain falling on the induction board, the DO output is high. When the amount of water decreases, the DO output is low, the switch indicator turns on. Remove the water droplets, when restored to its original state, it will come out to a high level.
GSM module (sim 900)
It is a GSM / GPRS compliant quad band cell phone that operates at 850/900/1800/1900 MHz and which can be used not only for Internet access but also for verbal communication (provided it is connected to a microphone and a small speaker ) and SMS.
Outwardly, it looks like a small package (2.4cm x 2.4cm x 0.3cm) with L-shaped contacts on the four sides so that they can be soldered from either the side or the bottom. Indoor unit controlled by processor AMR926EJ-S which controls telephony communication, data transmission (via the built-in TCP / IP stack) and (via UART and TTL serial interface) communication with the circuitry interfaced with the phone itself.
The processor is also responsible for the SIM card (3 or 1.8 V), which must be connected to the outer wall of the module. In addition, the GSM900 device integrates an analog interface, A / D converter, RTC, SPI bus, I²C and PWM module. The radio section is a GSM 2/2 + phase and is class 4 (2W) at 850/900 MHz or class 1 (1W) at 1800/1900 MHz.
The serial TTL interface is responsible not only for transmitting all data regarding already received SMS and those that enter during TCP / IP sessions into GPRS (data transfer rate is determined by GPRS class 10: maximum 85.6 kbps), but also receiving commands circuits (in our case, coming from the PIC, controlling remote control), which can be either AT standard or AT-enhanced SIMCom type. The module is continuously powered (3.4 to 4.5 V) and absorbs a maximum of 0.8 A during transmission.
Arduino Uno
Arduino Uno or Genuino Uno is a microcontroller board based on ATmega328P ( technical description). It has 14 digital I / O (of which 6 can be used as PWM outputs), 6 analog inputs, 16 MHz crystal, USB connection, power connector, ICSP header, and a reset button.
Step 3. Project description
In this project we are using a Raindrop Sensor to detect the Raindrop Intensity and generate some analog values. When the rain sensor detects the intensity of the raindrop, Arduino UNO sends a command to the GSM module, then the GSM module sends mail to the specified email id.
The connection of our circuit is shown above. There is two schematic diagrams : one for rain sensor with Arduino and one for Arduino with GSM module.
Step 4. Code for the project
You can download source of this project below.
/ * RAIN DROP DETECTOR WITH GSM (USING SIM-900 MINI, RAINDROP SENSOR & ARDUINO UNO); Here We Are Using Raindrop Sensor To Detect Raindrop Intensity And Generate An Analog Varying Signal From 0 To 1024. It Also Generates A Digital Output According To Its Preset Value. When The Raindrop Sensor Detects Rain Then It "s Going To Send An Analog Signal To Arduino Uno Board.Arduino Uno Monitoring The Change Happening On Raindrop Sensor. When The Value Of Raindrop Sensor Going Beyond A Certain Level Our Arduino Uno Sends Some At Command To Our GSM Module And GSM Module Send An SMS To The Given Phone No. The circuit: * GSM MODULE (SIM-900 MINI) 5VT (TX) CONNECTED TO PIN 9 (RX FOR SOFTWARE SERIAL) * GSM MODULE (SIM-900 MINI) 5VR (RX) CONNECTED TO PIN 10 (TX FOR SOFTWARE SERIAL) * RAINDROP SENSOR DO TO PIN 11 * RAINDROP SENSOR AO TO PIN A0 * CONNECT VCC OF RAINDROP TO 5V OF ARDUINO UNO * CONNECT VCC OF GSM TO 5V OF ARDUINO UNO. Created 8 NOV 2016 by SOUMYA RANJAN PANDA For any help contact [email protected]* / #includeStep 5. Final video
See the full video of the project and its description above. That's all.
In principle, you can make your own automatic wiper control system. This will allow you to monitor the operation of the wipers in different weather conditions. Modern cars are already equipped with this function.
Owners of old VAZ models are increasingly asking themselves about the possibility of installing a rain sensor on their car?
Many foreign cars on the windshield have a rain sensor ("DD" - hereinafter referred to as the text), which is built into the front glass, which does not allow removing it.
Drivers of a car that does not have such a sensor can install it on their own using a universal sensor. Such a device is suitable for any car, including "dozens".
Basic principles of the universal DD.
The location of the optical sensor must be vertical. Place it inside the passenger compartment on the windshield in the area covered by the brushes. The location for installing the sensor is selected without defects, such as chips or cracks.
Thanks to infrared radiation, the state of the glass is scanned from the outside. Moisture or dirt on the glass will change the reflection level. The electronic control unit receives a command to turn on the wiper. The system provides for automatic change of the pause for the movement of the brush, which depends on the amount of precipitation.
DD will fit various windshields, the upper tinted strip on the glass will not interfere with its installation. But the infrared filter on the glass will interfere with the operation of such a sensor, for example, in the Chevrolet - Niva Lux.
Features of inclusion of DD.
The sensor works only when the wipers are turned on in the first position, and then with the help of the sensor the speed of movement of the wipers increases or decreases. In the 2nd and 3rd positions, the work of the wipers does not change.
It is imperative to be able to manually control the wipers, since the cases are different, and the sensor cannot always cope with them. Examples are cases when there is a lot of splashes on the driver's side, but they are not in the sensor area, or when contamination in the form of bird droppings appears on the glass, and the driver, sitting in the passenger compartment, did not immediately notice it.
In dry weather, it is advisable to keep the DD turned off, in order to avoid false activation due to a flying insect in the detected area, fluff, leaves and even shadows, which are the reason for the wiper to work, wiping a dry windshield.
In all cars, the glass washer is turned on only manually; the automatic inclusion of a jet of liquid may come as a surprise and limit the driver's view.
For clarity, consideration of two DD models is given. In the first, a foreign microprocessor is used as a basis, and the second was created by domestic specialists:
Main characteristics of the rain sensor model RS-22 RAIN sensor
The sensor uses a microprocessor manufactured by the American company "Microchip". Installation of such a sensor is possible for any vehicle with 12 volt equipment.
Phased connection of DD model RS-22:
1. A holder from the sensor is attached to the windshield with glue;
2. To equalize the refractive index, apply a little special gel on the surface of the two working zones in the sensor body;
3. Fix the base of the sensor body to the holder with a self-tapping screw;
4. Check the working area from the sensor to the car glass for air bubbles.
Connection to VAZ DD:
The wiper operating mode switch serves as a connection point for the sensor, according to the attached diagram.
1.Using a blue wire, the sensor is connected to the car body.
2. With the red wire, the sensor is connected to the switch in contact “I”, and the standard yellow cord is disconnected with a green strip.
3. The sensor is connected with the yellow wire to the yellow car cord with a green stripe.
4. With the black wire the sensor is connected to the switch block on the “53” contact using the blue wire.
In order for the device to work properly, it needs an initial sensitivity calibration based on the parameters of the front glass throughput. With further use, the required sensitivity threshold for the sensor is set for the wiper to work. The manual for the RS-22 model contains information on the connection and operation of the system.
The main qualities of DDA sensors (DDA)
Our domestic engineers have invented a special rain sensor, during the creation of which ideas with other people's solutions were not copied. The system designers took into account the following conditions:
1. Ease of operation and control of the system;
2. Self-assembly of DD at home;
3. Ability to connect without interfering with the electrical wiring of a car, especially a car that is under warranty;
4. Ability to disable the rain sensor and manually control the wipers;
5. Cheap purchase.
In addition to these conditions, the finished device has a function for adjusting the pause of moving brushes, which is controlled by the speed of vehicle traffic. At low speed, the pause time increases. When driving through deep puddles, the system “recognizes” a large volume of water before the water rises to the glass surface, even at a distance of 50 to 100 mm, therefore, it activates the glass cleaners in advance.
The DDA-25 sensor model is installed on the Lada Priora and Kalina, its difference from the DDA-15 model lies in the different arrangement of the relay contacts.
The presence of modes: for rain \ snow \ standard mode. The front side of the sensor is equipped with two indicators and a button for quickly changing modes.
In accordance with the wishes of customers, the creators are constantly improving the system and its completion. So, in the first model it was not possible to adjust the sensitivity of the sensor. The problem was solved by means of a tinting film, which was placed in several layers under the sensor elements, and then this useful function was added to the new DDA models (as indicated in the instructions).
Stages of sensor installation (DDA):
1. Glue the optical sensor holder to the front glass of the passenger compartment.
2. Disassemble the mounting block in the car, take out the wiper control relay, insert the DD block in its place, adhering to the marking and key position.
3. Lay the wires on the left side of the windshield pillar.
4. Set the device sensitivity level.
For better clarity, you can watch the installation of the sensor in the video:
Purchase for VAZ rain sensor
Online stores offer a wide selection of DD for any car, just go to the "Accessories" section and order the desired model.
The cost of rain sensors depends on the manufacturer and the markup of the store, the initial limit is about 1 thousand rubles.
Finally
It is up to the car enthusiast to decide whether to install this system or not, for many it seems unnecessary. The fact remains that while driving, the driver does not need to look away from the road to adjust the movement of the wipers, and this reduces the risk of accidents and makes driving more comfortable in adverse weather conditions.
In negative reviews, you can often hear complaints about the poor-quality operation of the rain sensor. This may be the operation of the wipers when the left turn signal is turned on, when there is no possibility of adjusting the sensitivity on the sensor.
Summing up, we can say that the positive aspects of this device prevail over negative reviews.
Many car owners consider the rain sensor to be an unnecessary device, which you can do without. To understand whether it is really necessary, it is worth learning about the features of such devices.
The described device is a device that detects the occurrence of precipitation and includes wipers. Typically, the sensor also reacts to light and is used to automatically turn on the headlights.
Rain sensor
This device is designed to solve several problems:
- determination of the fact of the presence of rain or snow;
- turning on the wipers when it rains;
- determination of the degree of contamination of the windshield;
- turning on the headlights if the sensor is also designed to detect the level of illumination.
The installation of the described device is made between the windshield and the rear-view mirror. The rain sensor is designed to create a safer driving environment in a city or on a busy highway. If it starts raining or snowing during heavy traffic, the driver has to make unnecessary movements to turn the wipers on and off, while distracting from the road. This contributes to loss of attention and can lead to road accidents. In addition, the device allows for excellent visibility in the presence of a large amount of precipitation.
Rain sensors have several disadvantages:
- False or misplaced positives. In some cases, just one drop will turn on the wipers, while the rest of the glass remains dry. In this case, the sensor often does not work in the case when a part of the glass is filled with water and dirt, but the drops do not fall into the range of the device.
- Inclusion of wipers without glass washer. This smears dirt on the surface, impairing visibility.
- Actuation due to defects in the windshield. The presence of scratches and other defects on the surface can cause the device to malfunction.
- Delay of operation. In some cases, the rain sensor is triggered within 1-2 seconds after the rain drops on the windshield.
To avoid such problems and to preset the sensor to the desired sensitivity level, it is enough to splash water on the place where the sensor is installed. If it works correctly, the wipers will automatically turn on.
The rain sensor is mounted under the windshield on the back of the rearview mirror. During the installation of the device, the following nuances are taken into account:
- The sensor should be located on the windshield so that it does not interfere with the driver's view of the road. At the same time, it is important to install it in an area that is cleaned by the wipers during their work. Otherwise, the device may not function correctly.
- There should be no cracks or other defects in the area where the sensor is located, since the efficiency of its operation depends on this.
- Before attaching the appliance, make sure that the wipers effectively clean the windshield and do not leave any debris.
The sensor can be installed both in the service center and independently. Moreover, it is not difficult at all. No special installation tools are required.
Below we provide instructions for installing a simple DDA-35 rain sensor.
First you need to "aim" - choose a place on the inside of the windshield, where the sensor will be glued. As mentioned earlier, it should not interfere with the driver's vision. For beauty, it is advisable to align the place and install the sensor at the top in the middle, next to the mirror mount.
Purchased rain sensors most often have a special cloth for wiping and degreasing glass in the kit. This makes the sensor more secure.
If there is no such napkin in the kit, you can use any glass napkin.
Carefully wipe the place on the windshield where we will glue the rain sensor.
Remove the protective film from the inside of the sensor, thereby opening the mounts that will hold the sensor on the glass.
After that, we apply the rain sensor to the place selected on the glass and carefully press the device against the glass. We try to make everything work out smoothly, since we will not have a second chance. With each detachment, the holder will stick to the surface worse and worse.
Push the wire from the sensor under the headliner.
If there is not enough space under the upholstery, then slightly loosen the screws securing the visor.
Remove the overlay from the rack and lay the wire under it. After that, put the cover back on.
We go below. Carefully push the cable under the post seal.
We open the fuse box (in different models it is in different places), and install the rain sensor in place of the wiper control relay (be sure to observe the marking and position of the key). If we do not know exactly where to install the relay, look in the documentation.
The rest of the cable, if necessary, can be rolled up and left in the mounting block.
This completes the installation of the rain sensor on the car. It remains to check its performance by splashing water on the windshield (with the car ignition on, of course).
Checking the functionality of the rain sensor
You can also watch a video about installing a rain sensor:
After connecting the device, the wipers can be controlled manually. This may be necessary when moisture gets on the glass from under the wheels of a vehicle moving in front of the vehicle, which does not reach the sensor's range. In this case, the driver turns on the wipers manually.
It is necessary to set up the device immediately after installation so as not to be distracted by such actions while driving. The DDA-35 has 3 operating modes - standard, rain and snow. Modes are switched by pressing a single button alternately.
Factory built-in rain sensors adjustable using the steering column switch. The inclusion handle has 5 positions as standard (sometimes more and less). In position "0" the device is turned off. The numbers from 1 to 4 indicate the degree of sensitivity of the sensor. When the device is turned on in Mode 4, it will operate at maximum sensitivity. To turn it off, just turn the knob to position 0.
The rain sensor is adjusted using the steering column switch
How the rain sensor works
The described device consists of an LED and several light-sensitive elements (photodiodes). The light emanating from the LED reflects off the glass surface and returns to the light-sensitive elements. If there is rain or snow on the surface, the degree of reflection changes and the sensor turns on the wipers.
The more the windshield is moistened, the less refracted light will be reflected. The photocells react to the change and after that the wipers are switched on. That is why a false alarm can occur when insects hit the glass or if there are defects on the surface. To exclude untimely turning on of the wipers, it is enough to turn off the sensor in dry weather and install the device only on undamaged glass.
Turning on the factory rain sensor after installation is quite simple - to do this, you need to turn the steering column lever to positions from 1 to 4. It turns off when you switch the lever to position 0. In case of problems in the operation of the sensor, you should not try to turn it off yourself if you do not know how to do it right.
Example for setting a rain sensor.
To activate, move the steering column lever to position 1. Set the dial A according to the desired sensitivity (bottom - minimum, top - maximum).
To deactivate the rain sensor, move the steering column lever to position 0.
The main mistake of many drivers is to turn off the device in the simplest way - by cutting the wire. Doing so can lead to a malfunction of the onboard supply control unit. If the sensor does not respond to small drops, first unscrew the knob to position 4, in which it will operate in the maximum sensitivity mode.
To safely disconnect the sensor, simply remove the connector from it. In this case, an error will be displayed in the onboard power supply unit. If you need to completely turn off the device, you should contact a car service.
Many rain sensors are universal and can be fitted to any vehicle. They all work according to the same principle, so any driver can configure the device on their own.
How much does a rain sensor cost
The cost of many rain sensors is about 2 thousand rubles. The price depends on the sensitivity of the device, as well as on whether the electronic relay is built into the car or it is removable. The way the sensor is connected depends on this.
Many universal models cost no more than 2 thousand rubles. These sensors are the most common and are installed on a wide variety of machines. If the sensor is installed in a service center, specialists will select the most suitable device for the car.
Rain sensor - what is it, how it works, how to install
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