Tinovi PM-WCS-3-I2C soil moisture / EC and Temperature i2c sensor Arduino library

Interfacing from Arduino

WARNING!!! use 3.3 voltage levels only, more voltage will damage device, latest models support 2.2v-5v voltage levels

###wiring to Arduiono:

Arduiono pin #3V3 - sensor red (3.3v) (2.2v-5 for latest version)

Arduiono pin #A4 - sensor green (SDA)

Arduiono pin #A5 - sensor white (SCL)

Arduiono pin #GND - sensor black (GND)

pin #GND - shield (GND)

SDA and SCL lines requires pull-up resitors to 3.3v line, we recommend to use 1.8K resistors, because of long wiring to i2c sensor.

API

SVCS3();
  //pass i2c addres of sensor, default 0x63
  int init(int address);
  // update i2c address of sesnor
  int newAddress(byte newAddr);
  // hold sesnor in air or put in dry soil and call  (offset DP = 1 or VWC=0%)
  int calibrationAir();
  // submerge sesnor in the water or soil with water (offset DP = 80 or VWC=100%)
  int calibrationWater();
  // submerge sesnor in EC calibration fluid or soil with known EC and supply correc EC vaue in 
  int calibrationEC(int16_t valueUs);
  //initate reading, then need to wait for 100ms to let reading to finish
  int newReading();
  float getE25();
  float getEC();
  float getTemp();
  float getVWC();
  //get all values, supply float[4] , return 0-DP;1-EC;2-Temp;3-VWC
  void getData(float retVal[]);

Interfacing from Raspberry Pi

WARNING!!! 3.3 voltage levels only, more voltage will damage device

###wiring to Raspberry Pi connector:

Raspberry Pi pin #1 - sensor red (3.3v)

Raspberry Pi pin #3 - sensor green (SDA)

Raspberry Pi pin #5 - sensor white (SCL)

Raspberry Pi pin #9 - sensor black (GND)

Raspberry Pi pin #9 - sensor shield(GND)

Enable i2c interface in Raspberry Pi

see this manual

Get software

This sample software demonstrates hot to make command line interface for the sensor. Sensor default I2C address is 0x63.

To get software execute following on Raspberry Pi:

git clone https://github.com/tinovi/i2cRaspberry

cd i2cRaspberry

chmod 777 *.sh to add for scripts execute permission

./mk.sh to make demo executable

./read.sh to read data from sensor

./svcs 0x63 addr 0x65 to change default address 0x63 to new I2C address: 0x65

Get software

This sample software demonstrates hot to read data from sensor.

Sensor default I2C address is 0x63.

Download Arduino library from there.

Download Arduino esp32 library from there.

PM-WCS-3-I2C.pdf

Shop

[PM-WCS-3-I2C] https://github.com/tinovi/i2cArduino/blob/master/i2c-alvas-EC-729x1024.png "PM-WCS-3-I2C"