diff --git a/tasmota/xsns_02_analog.ino b/tasmota/xsns_02_analog.ino
index d9cd0c6e6..6ef00f6ee 100644
--- a/tasmota/xsns_02_analog.ino
+++ b/tasmota/xsns_02_analog.ino
@@ -97,6 +97,20 @@
 // Press "Up" will raise ADC to ANALOG_RANGE, Press "Dn" will raise ADC to ANALOG_RANGE/2
 #define ANALOG_JOYSTICK              (ANALOG_RANGE / 3) +100  // Add resistor tolerance
 
+// pH scale minimum and maximum values
+#define ANALOG_PH_MAX                             14.0
+#define ANALOG_PH_MIN                             0.0
+
+// Default values for calibration solution with lower PH
+#define ANALOG_PH_CALSOLUTION_LOW_PH              0.0
+#define ANALOG_PH_CALSOLUTION_LOW_ANALOG_VALUE    0 
+// Default values for calibration solution with higher PH
+#define ANALOG_PH_CALSOLUTION_HIGH_PH             14.0          
+#define ANALOG_PH_CALSOLUTION_HIGH_ANALOG_VALUE   ANALOG_RANGE
+
+// Multiplier used to store pH with 2 decimal places in a non decimal datatype 
+#define ANALOG_PH_DECIMAL_MULTIPLIER              100
+
 struct {
   uint8_t present = 0;
   uint8_t type = 0;
@@ -169,6 +183,12 @@ void AdcInitParams(uint8_t idx) {
       Adc[idx].param2 = ANALOG_CT_MULTIPLIER;    // (uint32_t) 100000
       Adc[idx].param3 = ANALOG_CT_VOLTAGE;       // (int)      10
     }
+    else if (ADC_PH == Adc[idx].type) {
+      Adc[idx].param1 = ANALOG_PH_CALSOLUTION_LOW_PH * ANALOG_PH_DECIMAL_MULTIPLIER;  // PH of the calibration solution 1, which is the one with the lower PH
+      Adc[idx].param2 = ANALOG_PH_CALSOLUTION_LOW_ANALOG_VALUE;                       // Reading of AnalogInput while probe is in solution 1
+      Adc[idx].param3 = ANALOG_PH_CALSOLUTION_HIGH_PH * ANALOG_PH_DECIMAL_MULTIPLIER; // PH of the calibration solution 2, which is the one with the higher PH
+      Adc[idx].param4 = ANALOG_PH_CALSOLUTION_HIGH_ANALOG_VALUE;                      // Reading of AnalogInput while probe is in solution 2
+    }
   }
   if ((Adcs.type != Adc[idx].type) || (0 == Adc[idx].param1) || (Adc[idx].param1 > ANALOG_RANGE)) {
     if ((ADC_BUTTON == Adc[idx].type) || (ADC_BUTTON_INV == Adc[idx].type)) {
@@ -211,6 +231,9 @@ void AdcInit(void) {
     if (PinUsed(GPIO_ADC_JOY, i)) {
       AdcAttach(Pin(GPIO_ADC_JOY, i), ADC_JOY);
     }
+    if (PinUsed(GPIO_ADC_PH, i)) {
+      AdcAttach(Pin(GPIO_ADC_PH, i), ADC_PH);
+    }
   }
   for (uint32_t i = 0; i < MAX_KEYS; i++) {
     if (PinUsed(GPIO_ADC_BUTTON, i)) {
@@ -309,6 +332,22 @@ uint16_t AdcGetLux(uint32_t idx) {
   return (uint16_t)ldrLux;
 }
 
+float AdcGetPh(uint32_t idx) {
+  int adc = AdcRead(Adc[idx].pin, 2);
+  AddLog_P(LOG_LEVEL_DEBUG, PSTR(D_LOG_APPLICATION "PH ADC RAW Value %d"), adc);
+
+  float y1 = Adc[idx].param1 / ANALOG_PH_DECIMAL_MULTIPLIER;
+  float x1 = Adc[idx].param2;
+  float y2 = Adc[idx].param3 / ANALOG_PH_DECIMAL_MULTIPLIER;
+  float x2 = Adc[idx].param4;
+
+  float m = (y2 - y1) / (x2 - x1);
+  float ph = m * (adc - x1) + y1;
+  
+  
+  return ph;
+}
+
 uint16_t AdcGetRange(uint32_t idx) {
   // formula for calibration: value, fromLow, fromHigh, toLow, toHigh
   // Example: 514, 632, 236, 0, 100
@@ -510,6 +549,22 @@ void AdcShow(bool json) {
         }
         break;
       }
+      case ADC_PH: {
+        float ph = AdcGetPh(idx);
+        char ph_chr[6];
+        dtostrfd(ph, 2, ph_chr);
+
+        AddLog_P(LOG_LEVEL_DEBUG, PSTR(D_LOG_APPLICATION "PHS Adc mapped sw %s"), ph_chr);
+        if (json) {
+          AdcShowContinuation(&jsonflg);
+          ResponseAppend_P(PSTR("\"pH%d\":%s"), idx + offset, ph_chr);
+  #ifdef USE_WEBSERVER
+        } else {
+          WSContentSend_PD(HTTP_SNS_PH, "", ph_chr);
+  #endif // USE_WEBSERVER
+        }
+        break;
+      }
     }
   }
   if (jsonflg) {
@@ -551,6 +606,21 @@ void CmndAdcParam(void) {
           } else {
             Adc[idx].param3 = (int)(CharToFloat(subStr(sub_string, XdrvMailbox.data, ",", 4)) * 10000);
           }
+
+          if (ADC_PH == XdrvMailbox.payload) {
+            char *phLow_chr = subStr(sub_string, XdrvMailbox.data, ",", 2);
+            char *phHigh_chr = subStr(sub_string, XdrvMailbox.data, ",", 4);
+            float phLow = CharToFloat(phLow_chr);
+            float phHigh = CharToFloat(phHigh_chr);
+            
+            Adc[idx].param1 = phLow * ANALOG_PH_DECIMAL_MULTIPLIER;
+            Adc[idx].param2 = strtol(subStr(sub_string, XdrvMailbox.data, ",", 3), nullptr, 10);
+            Adc[idx].param3 = phHigh * ANALOG_PH_DECIMAL_MULTIPLIER;
+            Adc[idx].param4 = strtol(subStr(sub_string, XdrvMailbox.data, ",", 5), nullptr, 10);
+
+            AddLog_P(LOG_LEVEL_INFO, PSTR(D_LOG_APPLICATION "pH probe calibrated. Low: pH %s ^= %d; High: pH %s ^= %d"), phLow_chr, Adc[idx].param2, phHigh_chr, Adc[idx].param4);
+          }
+
           if (ADC_CT_POWER == XdrvMailbox.payload) {
             if (((1 == Adc[idx].param1) & CT_FLAG_ENERGY_RESET) > 0) {
               for (uint32_t idx = 0; idx < MAX_ADCS; idx++) {