Water & Humidity

In this category there are sensors that detect humidity and water in general. Simple soil humidity sensor, DHT11, BME280 and many others.

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DHT22 temperature and humidity sensor
DHT22 temperature and humidity sensor

DHT22 is a temperature and humidity sensor with even more precise reading comparing to DHT11.

 

Simple soil humidity sensor
Simple soil humidity sensor

How many times have you watered your plants and feared you’re overdoing it? With the simple soil humidity sensor, those worries are a thing of the past! This two-part sensor is straightforward to use. The two exposed prongs go into the soil and send the humidity information to the sensor via the connected wire. The more water is in the ground, the better the results will be.

The two pieces are connected with the provided JST-SH 2-pin cable. The sensor uses the LM393 differential comparator. The main benefit of this board is ability to give analog and digital output. By setting the potentiometer on the board, you are able to get digital signal at the DO pin when signal crosses certain value, while analog values will be present on the AO pin at all times.

DHT11 temperature and humidity sensor
DHT11 temperature and humidity sensor

DHT11 is the simplest temperature and humidity sensor that can find. It connects to Dasduino in a very simple way using just one code (video below) and gives you back two variables as temperature and humidity.

It does not require extra calibration to work, just plug it in and use it. Look up the library for it in the TUTORIAL section.

DHT22 on PCB
DHT22 on PCB

DHT22 is a temperature and humidity sensor with even more precise reading comparing to DHT11. Comes soldered on a PCB.

 

Capacitive soil sensor
Capacitive soil sensor

How many times have you watered your plants and feared you overdid it? With the capacitive soil sensor, those worries are a thing of the past!

 

 

Most cheap soil sensors work on the resistance principle, where there are two prongs and the sensor measures the conductivity between them. They work fine at first, but eventually begin to oxidize due to the exposed metal. Even if they are gold plated! Due to oxidation, the resistance goes up and up, so you have to constantly recalibrate your code. Also, resistance measurements do not always work in loose soil.

 

 

This design with capacitive measurement is superior. Capacitive measurements use only one prong, have no exposed metal, and do not introduce direct current into your plants.

Gold-plated soil sensor
Gold-plated soil sensor

A fork-shaped soil humidity sensor with gold-plated contacts which prevent oxidation. It has a soldered terminal for easier wire connection.

 

Dimensions: 54mm x 22mm x 0.45mm

Simple rain sensor
Simple rain sensor

Water is essential for life on Earth. Using water efficiently is very important. With the easy-to-use simple rain sensor, farmers can save water while irrigating their crops. The sensor will alert them to shut down the water supply when it senses rain. It can even act as an automatic on and off switch, like turning on wipers on a car when it senses rain.

 

This sensor has two pieces – the rain sensor and the simple sensor. The rain sensor has nickel-coated lines on both sides. It measures moisture and outputs the data to the simple sensor that reads it. The simple sensor uses the LM393 differential comparator. The main benefit of this board is ability to give analog and digital output. By setting the potentiometer on the board, you are able to get digital signal at the DO pin when signal crosses certain value, while analog values will be present on the AO pin at all times.

Enviromental sensor BME280 breakout
Enviromental sensor BME280 breakout

BME280 is an atmospheric sensor which measures 3 values: temperature, pressure, and humidity. Additionally, it is possible to calculate elevation. It is simple to use since it communicates via I2C and it is extra small sized so it can be put anywhere. Everything you need to know about the atmospheric condition – this sensor can measure for you; just ideal for meteorological station projects! This board comes with two easyC connectors, providing easy connections.

Enviromental & air quality sensor BME680 breakout
Enviromental & air quality sensor BME680 breakout

The BME680 is an atmospheric sensor that measures four values: temperature, pressure, humidity and air quality as an IAQ index. Using that data can calculate elevation. It is really simple to use considering that it’s using I2C communication protocol and its dimensions are really small so it can fit anywhere. Everything you need to know about the atmospheric conditions and the quality of the air – you can find out using this sensor (ideal for weather station projects!) This board comes with two easyC connectors, providing easy connection to other products.

Temperature and humidity sensor SHTC3 breakout
Temperature and humidity sensor SHTC3 breakout

Want to keep track of both the humidity and temperature in your room? Or maybe in the greenhouse to protect your crops? The SHTC3 breakout board is the solution you’re looking for! The digital sensor measures the changes in humidity and temperature very precisely. Since it’s very accurate and the temperature range is wide, it is a go-to sensor if you want precise climate information.

 

The breakout board uses the I2C communication protocol. Thus, it has two easyC ports so no soldering, nor distinguishing between SDA and SCL is required. The hardware-defined I2C address is 0x70. The design is 3.3V ready with an onboard regulator for 5V. The board’s standard current consumption is low, only 430 µA.

 

Product usage tips:

If you encounter errors when using the breakout board, see if it’s connected properly. First, look at the pinout on the board and your microcontroller. If everything seems OK, look at the connections on the breakout board. If all the wiring is correct, make sure that the breakout board’s I2C address is right. It should be 0x70. Everything as it should be so far? Go through your code again. There might be some bugs that are stopping things from working as expected.

 

The SHTC3 breakout board works wonderfully in combination with Dasduino Core and 16×2 easyC LCD. You can display temperature in one row and humidity in the other. Due to the easyC connections on all three, hooking all the devices together is as easy as it gets. The SHTC3 breakout board has two mounting holes so it can be attached to the project and won’t budge. The pins provided can be soldered if you don’t want to use the easyC ports.

 

To keep the longevity of the sensor, keep track of the current going through the circuit. Allowing an excessive amount of current to flow through it may cause the sensor to fail. It is not impact-resistant. When dropped from a high distance or at an odd angle, it can break beyond repair.

Water flow meter
Water flow meter

The water flow meter allows you to find out the amount of water that has passed through the sensor in units of liters per minute. It consists of a plastic valve, a water-rotating rotor and a hall effect sensor. When water passes through the rotor, it rotates at different speeds, which the hall effect sensor measures. This signal is read and converted to L / min.

 

• Voltage: 5-18VDC
Measuring range: 1-30 L/min
• Maximum presure: 2.0MPa
Maximum operating current: 15mA
Tube diameter: 1/2”

Stainless steel water level sensor
Stainless steel water level sensor
The float sensor allows you to detect the height of water or some other liquid in the tank. This float sensor works on the principle of magnets and magnetic (reed) switches. Usually, it is mounted on the bottom or top of the tank, and when in water, the floating part with a magnet, triggers the magnetic switch. This alteration can be detected and trigger a certain action; eg filling the tank or launch alert. Sensor itself is made out of stainless steel and it won’t rust in humid enviroments.
Water level sensor
Water level sensor

The water level sensor allows you to detect the height of water or some other liquid in the tank. This float sensor works on the principle of magnets and magnetic (reed) switches. Usually, it is mounted on the bottom or top of the tank, and when in water, the floating part with a magnet, triggers the magnetic switch. This alteration can be detected and trigger a certain action; eg filling the tank or launch alert.

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