     plant1_value = analogRead(A0);
     plant2_value = analogRead(A1);
     plant3_value = analogRead(A2);
-    plant4_value = analogRead(A3);
+    voltage_value = analogRead(A3);
     light_value = analogRead(A4);
     temperature_value = analogRead(A5);
 

int plant1_value = 0;
int plant2_value = 0;
int plant3_value = 0;
int plant4_value = 0;
int temperature_value = 0;
int light_value = 0;


            Serial.print(plant2_value);
            Serial.print(", \"plant3_value\": ");
            Serial.print(plant3_value);
            Serial.print(", \"solar_value\": ");
            Serial.print(solar_value);
            Serial.print(", \"light_value\": ");
            Serial.print(light_value);
            Serial.print(", \"temperature_value\": ");
