DFROBOT/Moisture sensor V1.0
torben 2023-07-06 01:41:37 396 Views3 Replies Hi,
I am new to DFROBOT/Moisture sensor V1.0 (or rather its more expensive successor). I have installed it in an indoor pot without a flower.
I take readings every 3 minutes. It starts with reading 348-249 for many hours (say 12). Then it starts creeping up for period of, say, 4 hours until it reaches 352 when it suddenly jumps above 355 (I do not know how high).
My questions are:
1. Is it really possible that an indoor pot can stay at the same level of dryness for such a long period?
2.What is considered a normal wet and dry readings for a pot with a plant in it?
3. Or, if you cannot say, what is the normal size of the interval between wet and dry readings.
4. Is it normal, after creeping up for quite a long period, that the sensor makes a big jump. I have seen them bigger, say 6 readings?
Best regards
Torben
Hi Jenna,
Thank you for your reply.
The DFROBOT's home page gives the following for DFROBOT SEN0308 (which is what I ordered from DigiKey):
Dry: 570-380
Wet: 380-290
Very wet: 290-0
That does not correspond to the typical output voltages given by you.
The sensor I got from DigiKey is marked "Waterproof Capacitive Soil Moisture Sensor V.2.0” (and not DFROBOT SEN0308). I wonder if this is really a DFROBOT SEN 0308.
I am a bit confused - can you help?.
Best regards
Torben
torben Hi Torben,
Sorry, I misunderstood you.
SEN0114: 0 ~300: dry soil 300~700: moist soil 700~950: in water
SEN0308: (570,380]Dry, (380,190]Wet, (190,0]Very wet
product url: https://www.dfrobot.com/product-2054.html
Hi Torben,
Typical voltage value (e.g. Arduino UNO 10-bit AD, reference voltage 5V):
0 ~300: dry soil300~700: moist soil700~950: in water
The output value of this sensor is relative, and the value in a certain range represents the wetness of the soil.
jenna 
