Fix hardcoded serial objects in _debugSendSerial, terminalLoop and PZEM sensor (#1573)

README.md

@@ -4,9 +4,9 @@ ESPurna ("spark" in Catalan) is a custom firmware for ESP8285/ESP8266 based smar
 It uses the Arduino Core for ESP8266 framework and a number of 3rd party libraries.
 
 [![version](https://img.shields.io/badge/version-1.13.4-brightgreen.svg)](CHANGELOG.md)
-[![branch](https://img.shields.io/badge/branch-master-orange.svg)](https://github.com/xoseperez/espurna/tree/master/)
+[![branch](https://img.shields.io/badge/branch-dev-orange.svg)](https://github.com/xoseperez/espurna/tree/dev/)
 [![license](https://img.shields.io/github/license/xoseperez/espurna.svg)](LICENSE)
-[![travis](https://travis-ci.org/xoseperez/espurna.svg?branch=master)](https://travis-ci.org/xoseperez/espurna)
+[![travis](https://travis-ci.org/xoseperez/espurna.svg?branch=dev)](https://travis-ci.org/xoseperez/espurna)
 [![codacy](https://api.codacy.com/project/badge/Grade/c9496e25cf07434cba786b462cb15f49)](https://www.codacy.com/app/xoseperez/espurna/dashboard)
 [![downloads](https://img.shields.io/github/downloads/xoseperez/espurna/total.svg)](https://github.com/xoseperez/espurna/releases)
 <br />

code/espurna/debug.ino

@@ -19,9 +19,9 @@ char _udp_syslog_header[40] = {0};
 #if DEBUG_SERIAL_SUPPORT
     void _debugSendSerial(const char* prefix, const char* data) {
         if (prefix && (prefix[0] != '\0')) {
-            Serial.print(prefix);
+            DEBUG_PORT.print(prefix);
         }
-        Serial.print(data);
+        DEBUG_PORT.print(data);
 
     }
 #endif

code/espurna/sensors/PZEM004TSensor.h

@@ -247,7 +247,11 @@ class PZEM004TSensor : public BaseSensor {
             _busy = true;
 
             // Clear buffer in case of late response(Timeout)
-            while(Serial.available() > 0) Serial.read();
+            if (_serial) {
+                while(_serial.available() > 0) _serial.read();
+            } else {
+                // This we cannot do it from outside the library
+            }
 
             float read;
             float* readings_p;

code/espurna/terminal.ino

@@ -221,7 +221,7 @@ void _terminalLoop() {
     #if SERIAL_RX_ENABLED
 
         while (SERIAL_RX_PORT.available() > 0) {
-            char rc = Serial.read();
+            char rc = SERIAL_RX_PORT.read();
             _serial_rx_buffer[_serial_rx_pointer++] = rc;
             if ((_serial_rx_pointer == TERMINAL_BUFFER_SIZE) || (rc == 10)) {
                 terminalInject(_serial_rx_buffer, (size_t) _serial_rx_pointer);