The reason for the slow response time at the end is because your sensor is faulty, there is no pulldown resistor on the analogue output. At 0:01, on the bottom right of the sensor, just below C4 and R4, the via hole is breaking the trace. You need to run a wire from the right side of R4 (nearest to the end), to the analogue output pin. Check out the video by “flora” on capacitance soil sensors
Nice video. One thing i would do differently is instead of using a cup of water to calibrate, use a pot with dry soil and take that as a dry measurement. Than get your soil to field capacity (Not too wet, not too dry. just right) and take that as your "wet" measurement. The readings will be much different than actually wet and dry. I made this mistake and killed plants by overwatering. ProTip: Censors need to be recalibrated if using a different type of soil than from the original calibration. Always calibrate in the soil you are going to grow in, because each medium is different.
Well a smarter way to do it, is self adjusting the moisture, like saving the variable in a permanent memory (store even when turn off) and re-ajust by when a higher or lower score hits than the stored range. (Button of reset is needed if change the circuit)
Дякую за детальну інформацію!
Thanks!
I actually prefer the resistive sensors. You turn them on one by one for two seconds, store their values in variables and then read those variables and activate the pumps. You run the code every thirty minutes, this way the sensors last a very long time, because they're only powered for a couple of seconds per hour.
Many ask what the difference is between v1.2 and v2.0. There isn't much information available. This is what I found out so far myself: - The spelling of the out pin: AOUT on v1.2 and AUOT on the v2.0 - The tip on the top-side of the PCB shows a tiny circle on v2.0
Thanks for the great explanation A few questions: 1. Is this solution scalable for a large garden with about 50 pots. What is the proper way to measure multiple pots at once? 2. How do you protect the sensore from water in case you want to keep it constantly in soil even when raining?
Very cool Bas. I just stumbled upon your Channel today!,
very helpful for me! thanks
Thank you so much 🤩🤩
It's help me so much. Thank you.
Thx for the tutorial
Thank you so much! This is very helpful!
Hope will read this when u need help. I tried it by my self to read the moisture and it didn't changed the value even thought the sensor was in wet soil. The problem was that I plugged the sensor nearly close to the edge of the flowerpot and the sensor got no good connection to the soil. You have to be sure that the sensor is really pressed at the front side of the sensor (front side = Label side with Capacitive ....)
what if i want to set a threshold value of moisture below which i irrigate. kindly highlight on that
Ty you helped me alot
Thank you so much for this video. I will use it as my guide. Please do you have a tutorial on using several soil moisture sensor to one arduino?
Though yr explanation of the general principle of a capacitive sensor (measuring charge and discharge time)is correct, it is not how this sensor is working: you are not measuring a time but a voltage. Should you measure a charging time, you would need a starting point. The principle in this sensor is different. The output of the 555 oscillator is fed to a voltage divider that is fomed by a 10k resistor and the reactance of the capacitor in the probe. When that reactance changes as a result of the capacity changing so does the voltage on the Aout
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