sns/cse7766: fix pin naming

code/espurna/config/hardware.h

@@ -549,7 +549,7 @@
     #ifndef CSE7766_SUPPORT
     #define CSE7766_SUPPORT     1
     #endif
-    #define CSE7766_PIN         1
+    #define CSE7766_RX_PIN      3
 
 #elif defined(ITEAD_SONOFF_DUAL)
 
@@ -975,7 +975,7 @@
 
     // CSE7766
     #define CSE7766_SUPPORT         1
-    #define CSE7766_PIN             1
+    #define CSE7766_RX_PIN          3
 
 #elif defined(ITEAD_SONOFF_S31_LITE)
 
@@ -3201,7 +3201,7 @@
     #ifndef CSE7766_SUPPORT
     #define CSE7766_SUPPORT     1
     #endif
-    #define CSE7766_PIN         1
+    #define CSE7766_RX_PIN      3
 
 // -----------------------------------------------------------------------------
 // Teckin SP21

code/espurna/config/sensors.h

@@ -284,8 +284,9 @@
 #define CSE7766_SUPPORT                 0
 #endif
 
-#ifndef CSE7766_PIN
-#define CSE7766_PIN                     1       // TX pin from the CSE7766
+#ifndef CSE7766_RX_PIN
+#define CSE7766_RX_PIN                  3      // RX pin connected to the CSE7766
+                                               // As we never transmit anything, this is the only pin used
 #endif
 
 #ifndef CSE7766_PIN_INVERSE

code/espurna/sensor.cpp

@@ -1571,7 +1571,7 @@ void _sensorLoad() {
     #if CSE7766_SUPPORT
     {
         CSE7766Sensor * sensor = new CSE7766Sensor();
-        sensor->setRX(CSE7766_PIN);
+        sensor->setRX(CSE7766_RX_PIN);
         _sensors.push_back(sensor);
     }
     #endif

code/espurna/sensors/CSE7766Sensor.h

@@ -132,8 +132,12 @@ class CSE7766Sensor : public BaseEmonSensor {
 
             if (_serial) delete _serial;
 
-            if (1 == _pin_rx) {
+            if (3 == _pin_rx) {
                 Serial.begin(CSE7766_BAUDRATE);
+            } else if (13 == _pin_rx) {
+                Serial.begin(CSE7766_BAUDRATE);
+                Serial.flush();
+                Serial.swap();
             } else {
                 _serial = new SoftwareSerial(_pin_rx, -1, _inverted);
                 _serial->enableIntTx(false);
@@ -148,7 +152,7 @@ class CSE7766Sensor : public BaseEmonSensor {
         // Descriptive name of the sensor
         String description() {
             char buffer[28];
-            if (1 == _pin_rx) {
+            if (_serial_is_hardware()) {
                 snprintf(buffer, sizeof(buffer), "CSE7766 @ HwSerial");
             } else {
                 snprintf(buffer, sizeof(buffer), "CSE7766 @ SwSerial(%u,NULL)", _pin_rx);
@@ -368,8 +372,12 @@ class CSE7766Sensor : public BaseEmonSensor {
 
         // ---------------------------------------------------------------------
 
+        bool _serial_is_hardware() {
+            return (3 == _pin_rx) || (13 == _pin_rx);
+        }
+
         bool _serial_available() {
-            if (1 == _pin_rx) {
+            if (_serial_is_hardware()) {
                 return Serial.available();
             } else {
                 return _serial->available();
@@ -377,7 +385,7 @@ class CSE7766Sensor : public BaseEmonSensor {
         }
 
         void _serial_flush() {
-            if (1 == _pin_rx) {
+            if (_serial_is_hardware()) {
                 return Serial.flush();
             } else {
                 return _serial->flush();
@@ -385,7 +393,7 @@ class CSE7766Sensor : public BaseEmonSensor {
         }
 
         uint8_t _serial_read() {
-            if (1 == _pin_rx) {
+            if (_serial_is_hardware()) {
                 return Serial.read();
             } else {
                 return _serial->read();
@@ -394,7 +402,7 @@ class CSE7766Sensor : public BaseEmonSensor {
 
         // ---------------------------------------------------------------------
 
-        unsigned int _pin_rx = CSE7766_PIN;
+        int _pin_rx = CSE7766_RX_PIN;
         bool _inverted = CSE7766_PIN_INVERSE;
         SoftwareSerial * _serial = NULL;