Could you submerge the moisture sensor fully in soil if all connections are adequately protected?

I put conformal coating and heatshrink on them and had no problems with soil immersion. I calibrate the sensors in water (100% moisture), and dry air (0% moisture) because there is lots of variation sensor to sensor in both offset and gain.

What are the measurement units? Centibars?

You need to calibrate the units in code. More details here. https://wiki.dfrobot.com/Capacitive_Soil_Moisture_Sensor_SKU_SEN0193

What is the average power consumption per reading?

I don't know the answer, but it is pretty low. If interested, for the price buy one and see if it suits your needs. I use mine in a handheld device and only power it up when I need a reading. I am using a Raspberry Pico and running it off of a 9-volt battery reduced to 5 volts.

What library do I need for a raspberry pi?

You don't need a library, just need to read the analog pin,A0. This is what I use: // Calibration: SOIL_AIR is reading when dry, SOIL_WATER is reading when submerged in water about 3/4 up the stick // Used to calculate a 0-100% range based on the readings #define SOIL_AIR 362 #define SOIL_WATER 637 int get_soil_readings(int n) { int a0 = 0; for(int i=0; i<n;i++) { int raw = analogRead(SOIL_ANALOG); Debug << "Raw Reading: " << raw << "\r\n"; raw = max(SOIL_AIR,raw); raw = min(SOIL_WATER, raw); Debug << "MinMax'd Reading: " << raw << "\r\n"; a0 += raw; delay(5); } int reading = a0/n; float percentage = (reading - SOIL_WATER) * 100.0 / (SOIL_AIR-SOIL_WATER); return int(percentage); }

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Gikfun Capacitive Soil Moisture Sensor Corrosion Resistant for Arduino Moistu...

Gikfun Capacitive Soil Moisture Sensor Corrosion Resistant for Arduino Moistu...

Product ID: 87306561

Details

Brand
Gikfun
Item Weight
22 g
Item dimensions L x W x H
0.91 x 0.01 x
Mounting Type
Tabletop
Style
Modern

💧Capacitive sensing

📏98 x 23mm

🔌3.3-5.5V DC

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Description

🌿 Grow smarter, not harder!

🔧 DIY FRIENDLY - Seamlessly integrates with Arduino and Raspberry Pi projects.
🌱 SMART GARDENING - Elevate your plant care with precision moisture detection.
📊 ACCURATE READINGS - Capacitive technology outperforms traditional resistive sensors.
🌍 ECO CONSCIOUS CHOICE - Promote sustainable gardening with intelligent moisture management.
🌧️ CORROSION RESISTANT - Built to last, ensuring longevity in any garden environment.

The Gikfun Capacitive Soil Moisture Sensor is a cutting-edge tool designed for garden enthusiasts and DIY techies alike. With a corrosion-resistant build and advanced capacitive sensing technology, it provides accurate moisture readings to optimize plant care. Compatible with Arduino and Raspberry Pi, this sensor is perfect for intelligent agriculture and home gardening projects.

Specifications

ASIN	B07H3P1NRM
Best Sellers Rank	#57,828 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #70 in Soil Meters
Brand	Gikfun
Brand Name	Gikfun
Customer Reviews	4.2 out of 5 stars 244 Reviews
Item Dimensions	0.91 x 0.01 x 3.86 inches
Item Weight	22 g
Item dimensions L x W x H	0.91 x 0.01 x 3.86 inches
Manufacturer	Esooho
Model	EK1940
Mounting Type	Tabletop
Number of Items	2
Output Type	Analog
Part Number	EK1940
Specific Uses For Product	garden watering, outdoor use
Style	Modern
Style Name	Modern
Unit Count	2 Count

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EC$87

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In stock

Sold byAmazon Saint Kitts and NevisDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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