I am using a Raspberry Pi 3 with a GrovePi+. The code I am using is given below:
[code]#!/usr/bin/env python
GrovePi Example for using the Grove Moisture Sensor (http://www.seeedstudio.com/wiki/Grove_-_Moisture_sensor)
The GrovePi connects the Raspberry Pi and Grove sensors. You can learn more about GrovePi here: http://www.dexterindustries.com/GrovePi
Have a question about this example? Ask on the forums here: http://forum.dexterindustries.com/c/grovepi
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License
The MIT License (MIT)
GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
Copyright © 2017 Dexter Industries
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the “Software”), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
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NOTE:
The wiki suggests the following sensor values:
Min Typ Max Condition
0 0 0 sensor in open air
0 20 300 sensor in dry soil
300 580 700 sensor in humid soil
700 940 950 sensor in water
Sensor values observer:
Val Condition
0 sensor in open air
18 sensor in dry soil
425 sensor in humid soil
690 sensor in water
import time
import grovepi
Connect the Grove Moisture Sensor to analog port A0
SIG,NC,VCC,GND
sensor = 0
while True:
try:
print(grovepi.analogRead(sensor))
time.sleep(.5)
except KeyboardInterrupt:
break
except IOError:
print ("Error")<e>[/code]</e></CODE>
The error message is given below:
</s>Traceback (most recent call last):
File "/home/pi/Dexter/GrovePi/Software/Python/grove_moisture_sensor.py", line 61, in <module>
print(grovepi.analogRead(sensor))
File "/home/pi/Dexter/GrovePi/Software/Python/grovepi.py", line 227, in analogRead
return number[1] * 256 + number[2]
TypeError: 'int' object is not subscriptable<e>