Fixes plerup#171: prepares for ESP8266 Arduino core PR 6979.

Author: dok-net

library.json

@@ -1,6 +1,6 @@
 {
     "name": "EspSoftwareSerial",
-    "version": "6.11.2",
+    "version": "6.11.3",
     "keywords": [
       "serial", "io", "softwareserial"
     ],

library.properties

@@ -1,5 +1,5 @@
 name=EspSoftwareSerial
-version=6.11.2
+version=6.11.3
 author=Dirk Kaar, Peter Lerup
 maintainer=Dirk Kaar <dok@dok-net.net>
 sentence=Implementation of the Arduino software serial for ESP8266/ESP32.

src/SoftwareSerial.cpp

@@ -204,9 +204,9 @@ int SoftwareSerial::read() {
     return val;
 }
 
-size_t SoftwareSerial::read(uint8_t* buffer, size_t size) {
+int SoftwareSerial::read(uint8_t* buffer, size_t size) {
     if (!m_rxValid) { return 0; }
-    size_t avail;
+    int avail;
     if (0 == (avail = m_buffer->pop_n(buffer, size))) {
         rxBits();
         avail = m_buffer->pop_n(buffer, size);

src/SoftwareSerial.h

@@ -156,9 +156,13 @@ class SoftwareSerial : public Stream {
         return (0x9669 >> byte) & 1;
     }
     /// The read(buffer, size) functions are non-blocking, the same as readBytes but without timeout
-    size_t read(uint8_t* buffer, size_t size);
+    int read(uint8_t* buffer, size_t size)
+//#if defined(ESP8266)
+//        override
+//#endif
+        ;
     /// The read(buffer, size) functions are non-blocking, the same as readBytes but without timeout
-    size_t read(char* buffer, size_t size) {
+    int read(char* buffer, size_t size) {
         return read(reinterpret_cast<uint8_t*>(buffer), size);
     }
     /// @returns The number of bytes read into buffer, up to size. Times out if the limit set through