Hi, I´m a beginner in these topics, and I have to work with and a soil sensor that measure 7 parameters, I only receive the sensors and I don´t have any information about it, but I am using a code and I only have a value of 255 in all the them, also I don´t give attention with the OLED monitor part now, because i want to make it work first, I hope that someone could help me with this, thank you, that is an image of the sensor, the code and the values in serial:
#include <SoftwareSerial.h
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
/////
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
#define RE 8
#define DE 7
//const byte code[]= {0x01, 0x03, 0x00, 0x1e, 0x00, 0x03, 0x65, 0xCD};
const byte nitro[] = {0x01,0x03, 0x00, 0x1e, 0x00, 0x01, 0xe4, 0x0c};
const byte phos[] = {0x01,0x03, 0x00, 0x1f, 0x00, 0x01, 0xb5, 0xcc};
const byte pota[] = {0x01,0x03, 0x00, 0x20, 0x00, 0x01, 0x85, 0xc0};
const byte soil_ph[] = {0x01, 0x03, 0x00, 0x06, 0x00, 0x01, 0x64, 0x0b};
const byte soil_moist[] = {0x01, 0x03, 0x00, 0x12, 0x00, 0x01, 0x24, 0x0f};
const byte temp[] = {0x01, 0x03, 0x00, 0x12, 0x00, 0x02, 0x64, 0x0e};
const byte ec[] = {0x01, 0x03, 0x00, 0x15, 0x00, 0x01, 0x95, 0xce};
byte values[11];
SoftwareSerial mod(2,3);////// TX AND RX
void setup() {
Serial.begin(9600);
mod.begin(9600);
pinMode(RE, OUTPUT);
pinMode(DE, OUTPUT);
display.begin(SSD1306_SWITCHCAPVCC, 0x3C); //initialize with the I2C addr 0x3C (128x64)
delay(500);
display.clearDisplay();
display.setCursor(25, 25);
display.setTextSize(1);
display.setTextColor(WHITE);
display.println(" Soil Sensor");
display.setCursor(25, 40);
display.setTextSize(1);
display.print("Initializing");
display.display();
delay(1000);
}
void loop() {
byte val1,val2,val3,val4,val5,val6,val7;
val1 = nitrogen();
delay(250);
val2 = phosphorous();
delay(250);
val3 = potassium();
delay(250);
val4 = ph();
delay(250);
val5 = moist();
delay(250);
val6 = stemp();
delay(250);
val7 = econd();
delay(250);
Serial.print("Nitrogen: ");
Serial.print(val1);
Serial.println(" mg/kg");
Serial.print("Phosphorous: ");
Serial.print(val2);
Serial.println(" mg/kg");
Serial.print("Potassium: ");
Serial.print(val3);
Serial.println(" mg/kg");
Serial.print("Soil pH: ");
Serial.print(val4);
Serial.println(" pH");
Serial.print("Soil Moisture: ");
Serial.print(val5);
Serial.println(" %");
Serial.print("Temperature: ");
Serial.print(val6);
Serial.println(" C");
Serial.print("Electrical Conductivity: ");
Serial.print(val7);
Serial.println(" mS/m");
delay(1000);
/////
display.clearDisplay();
display.setTextSize(1);
display.setCursor(0, 0);
display.print("N: ");
display.print( val1);
display.setTextSize(1);
display.print(" mg/kg");
display.setTextSize(1);
display.setCursor(0, 15);
display.print("P: ");
display.print( val2);
display.setTextSize(1);
display.print(" mg/kg");
display.setTextSize(1);
display.setCursor(0,30);
display.print("K: ");
display.print( val3);
display.setTextSize(1);
display.print(" mg/kg");
display.setTextSize(1);
display.setCursor(0,43);
display.print("PH: ");
display.print(val4);
display.setTextSize(1);
display.print(" ph");
//
display.setTextSize(1);
display.setCursor(0,57);
display.print("SM: ");
display.print(val5);
display.setTextSize(1);
display.print(" %");
// display.setTextSize(1);
// display.setCursor(50,57);
// display.print("T: ");
// display.print(val6);
// display.setTextSize(1);
// display.print(" C");
//
//
// display.display();
// delay(3000);
//
//
//
// display.setTextSize(1);
// display.setCursor(0,60);
// display.print("T: ");
// display.print(val7);
// display.setTextSize(1);
// display.print(" C");
display.setTextSize(1);
// display.setCursor(0,60);
// display.print("T: ");
// display.print(val7);
// display.setTextSize(1);
// display.print(" C");
display.display();
delay(1000);
}
byte nitrogen(){
digitalWrite(DE,HIGH);
digitalWrite(RE,HIGH);
delay(10);
if(mod.write(nitro,sizeof(nitro))==8){
digitalWrite(DE,LOW);
digitalWrite(RE,LOW);
for(byte i=0;i<7;i++){
Serial.print(mod.read(),HEX);
values[i] = mod.read();
Serial.print(values[i],HEX);
}
Serial.println();
}
return values[4];
}
byte phosphorous(){
digitalWrite(DE,HIGH);
digitalWrite(RE,HIGH);
delay(10);
if(mod.write(phos,sizeof(phos))==8){
digitalWrite(DE,LOW);
digitalWrite(RE,LOW);
for(byte i=0;i<7;i++){
Serial.print(mod.read(),HEX);
values[i] = mod.read();
Serial.print(values[i],HEX);
}
Serial.println();
}
return values[4];
}
byte potassium(){
digitalWrite(DE,HIGH);
digitalWrite(RE,HIGH);
delay(10);
if(mod.write(pota,sizeof(pota))==8){
digitalWrite(DE,LOW);
digitalWrite(RE,LOW);
for(byte i=0;i<7;i++){
Serial.print(mod.read(),HEX);
values[i] = mod.read();
Serial.print(values[i],HEX);
}
Serial.println();
}
return values[4];
}
byte ph(){
digitalWrite(DE,HIGH);
digitalWrite(RE,HIGH);
delay(10);
if(mod.write(soil_ph,sizeof(soil_ph))==8){
digitalWrite(DE,LOW);
digitalWrite(RE,LOW);
for(byte i=0;i<7;i++){
Serial.print(mod.read(),HEX);
values[i] = mod.read();
Serial.print(values[i],HEX);
}
Serial.println();
}
return values[4];
}
byte moist(){
digitalWrite(DE,HIGH);
digitalWrite(RE,HIGH);
delay(10);
if(mod.write(soil_moist,sizeof(soil_moist))==8){
digitalWrite(DE,LOW);
digitalWrite(RE,LOW);
for(byte i=0;i<7;i++){
Serial.print(mod.read(),HEX);
values[i] = mod.read();
Serial.print(values[i],HEX);
}
Serial.println();
}
return values[4];
}
byte stemp(){
digitalWrite(DE,HIGH);
digitalWrite(RE,HIGH);
delay(10);
if(mod.write(temp,sizeof(temp))==8){
digitalWrite(DE,LOW);
digitalWrite(RE,LOW);
for(byte i=0;i<7;i++){
Serial.print(mod.read(),HEX);
values[i] = mod.read();
Serial.print(values[i],HEX);
}
Serial.println();
}
return values[4];
}
byte econd(){
digitalWrite(DE,HIGH);
digitalWrite(RE,HIGH);
delay(10);
if(mod.write(ec,sizeof(ec))==8){
digitalWrite(DE,LOW);
digitalWrite(RE,LOW);
for(byte i=0;i<7;i++){
Serial.print(mod.read(),HEX);
values[i] = mod.read();
Serial.print(values[i],HEX);
}
Serial.println();
}
return values[4];
}
