Hi folks,
I want to buy a sensor which could detect the different level of mud wetness, but i dont know a lot about sensors. is there any one who could help me?
i want to use this sensor to connect it to an Arduino, in a way that regarding 3 different level of wetness, it shows the 3 different colors,.
i would really appreciate it if any one could help me.
Resistance (the method in the soil moisture sensor) may be a reasonable solution. That is a fairly clever solution, though.
However, you talk about mud wetness. Since mud is already pretty wet, could you explain what you mean and, specifically, what distinguishes the 3 different levels of wetness.
Philba:
Resistance (the method in the soil moisture sensor) may be a reasonable solution. That is a fairly clever solution, though.However, you talk about mud wetness. Since mud is already pretty wet, could you explain what you mean and, specifically, what distinguishes the 3 different levels of wetness.
Philba, yes my mean was soil moisture detector. now i bought one but it has 2 pins, how can i get analog input from it? i one to connect it to arduino. I really need a queick help I’m doing a uni project but I stuck. this is the linke of the sensor that I bought it. I really appreciate it if u could help me.
Thank you, Its interesting :)Mee_n_Mac:
http://www.cheapvegetablegardener.com/2 … ensor.html
chamaz:
Philba, yes my mean was soil moisture detector. now i bought one but it has 2 pins, how can i get analog input from it? i one to connect it to arduino. I really need a queick help I’m doing a uni project but I stuck. this is the linke of the sensor that I bought it. I really appreciate it if u could help me.
A few things you need to know.
You’ve bought a humidity sensor, not a soil moisture sensor. Your’s is meant to be used above ground in the atmosphere.
You sensor doesn’t change resistance with varying humidity, it changes it’s capacitance. That’s why the datasheet calls it a Capacitive Humidity Sensor. While there are ways to measure capacitance with an Arduino, it’s not as straightforward as I think you’ll want … and you’ll want a different sensor in any case.
http://sensing.honeywell.com/index.php/ … /1/re_id/0
Actually forget that last part … I’ve decided I’m not that curious.
Mee_n_Mac:
chamaz:
Philba, yes my mean was soil moisture detector. now i bought one but it has 2 pins, how can i get analog input from it? i one to connect it to arduino. I really need a queick help I’m doing a uni project but I stuck. this is the linke of the sensor that I bought it. I really appreciate it if u could help me.A few things you need to know.
You’ve bought a humidity sensor, not a soil moisture sensor. Your’s is meant to be used above ground in the atmosphere.
You sensor doesn’t change resistance with varying humidity, it changes it’s capacitance. That’s why the datasheet calls it a Capacitive Humidity Sensor. While there are ways to measure capacitance with an Arduino, it’s not as straightforward as I think you’ll want … and you’ll want a different sensor in any case.
http://sensing.honeywell.com/index.php/ … /1/re_id/0
- Why is it every University student waits until the last minute and then needs quick help ? I guess you don’t need to know this but I’m sure curious.
Actually forget that last part … I’ve decided I’m not that curious.
Thank you anyway for your help. Now stuff became clear and complicated for me :). Is there any possible way to use these sensors or not? if yes how. besides, do you know any code to translate the soil moisture sensor to digital one for arduino and give me the flash light output? 
i know this is a lot sorry
chamaz:
Thank you anyway for your help. Now stuff became clear and complicated for me :). Is there any possible way to use these sensors or not? if yes how. besides, do you know any code to translate the soil moisture sensor to digital one for arduino and give me the flash light output?
I don’t think those sensors are suitable for your project. You might try looking for garden moisture sensors from the people who make commercial units. Google is your friend. I know there are some that are a variable resistor vs moisture. Then read the following …
http://oomlout.com/a/products/ardx/circ-08
… you should be able to figure out how to code an Arduino to read resistance by making a voltage divider, same as done with the potentiometer above.
PS - Last I checked I completed my BSEE and MSEE quite some years ago. I don’t do someone else’s University projects for them.
Mee_n_Mac:
chamaz:
Thank you anyway for your help. Now stuff became clear and complicated for me :). Is there any possible way to use these sensors or not? if yes how. besides, do you know any code to translate the soil moisture sensor to digital one for arduino and give me the flash light output?I don’t think those sensors are suitable for your project. You might try looking for garden moisture sensors from the people who make commercial units. Google is your friend. I know there are some that are a variable resistor vs moisture. Then read the following …
http://oomlout.com/a/products/ardx/circ-08
… you should be able to figure out how to code an Arduino to read resistance by making a voltage divider, same as done with the potentiometer above.
PS - Last I checked I completed my BSEE and MSEE quite some years ago. I don’t do someone else’s University projects for them.
Thank you that was really helpful, I dont want you do my project, your helps mean a lot for me and i really appreciate it. i’m a design student, if any things regarding to design that you need i would really happy to help you. 
again thank you for all your helps.