Moisture sensor example for Cube Cell

08435051 · November 9, 2020, 9:33pm

Just wonder if anyone has an example sketch for a moisture sensor on a CubeCell?

tried didn’t work

#define SensorPin GPIO2 
float sensorValue = 0; 
void setup() { 
 Serial.begin(9600); 
} 
void loop() { 
 for (int i = 0; i <= 100; i++) 
 { 
   sensorValue = sensorValue + analogRead(SensorPin); 
   delay(1); 
 } 
 sensorValue = sensorValue/100.0; 
 Serial.println(sensorValue); 
 delay(30); 
}

ksckung · November 10, 2020, 2:45am

I assume your sensor is Analog output.

GPIO2 no an ADC input pin. You cannot get a correct reading by analogRead() on this pin.
HTCC-AB01 only has 1 ADC pin and connected to the Vbat voltage divider internally.
HTCC-AB02 has 3 ADC pin and ADC1 pin connected to the Vbat voltage divider internally.

If you use HTCC-AB01, please check this to know how to use it.
https://heltec-automation-docs.readthedocs.io/en/latest/cubecell/frequently_asked_questions.html

If you use HTCC-AB02, please check HTCC-AB02’s pins_arduino.h and ADC example.
Just replace “ADC” in ADC example with the pin you connected to sensor output.

#define ADC P2_0
#define ADC1 ADC
#define ADC2 P2_1
#define ADC3 P2_2

jasonXu · November 10, 2020, 4:03am

Can you tell us the model of the sensor?

08435051 · November 10, 2020, 4:07am

sure it’s Arduino Compatible Soil Moisture Sensor Module

https://www.jaycar.com.au/arduino-compatible-soil-moisture-sensor-module/p/XC4604

dbazza1 · November 10, 2020, 5:34am

I’m also having trouble compiling code for a I2C capacitive soil moisture sensor. The library I’m using is this one.

Does anyone know how to fix the errors the arduino IDE is showing?

Thanks heaps

jasonXu · November 10, 2020, 6:23am

hi,

You can comment out these functions directly. There are no such functions in the development environment of cubecell.
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ksckung · November 10, 2020, 7:39am

the Adafruit_seesaw library is designed for SAMD09 core, I think rewrite the communication program using the Cubecell I2C library should be easier.

OR

Edit the library Adafruit_seesaw.h and Adafruit_seesaw.c.
Only keep begin() , getVersion(), getTemp() , .touchRead() and sub-function called by these function.

dbazza1 · November 10, 2020, 10:52pm

Thanks guys I’ll try modify the code and see how I go.

dbazza1 · November 11, 2020, 3:56am

Yeah no luck, my code skills aren’t quite up to scratch to get this working

camin123 · March 8, 2023, 10:02am

I read the instructions for AB01 but is is not clear what do you mean by “remove the resistance”. I have joined the 2 points in the picture. However i still read the "battery: (i am poweredvia USB)