added possibility to reduce memory footprint by turning off including…

… unused strategies

PJON.h

@@ -70,13 +70,28 @@ limitations under the License. */
   #define PJON_h
   #include <Arduino.h>
   #include <PJONDefines.h>
-  #include "strategies/OverSampling/OverSampling.h"
-  #include "strategies/SoftwareBitBang/SoftwareBitBang.h"
-  #include "strategies/ThroughSerial/ThroughSerial.h"
-  /* Avoid ATtiny 45/85 error missing inclusion error */
-  #if !defined(__AVR_ATtiny45__) && !defined(__AVR_ATtiny85__)
+  /** Include customisations for memory optimisation */
+  #if defined(PJON_STRATEGY_ETHERNET)
     #include "strategies/EthernetTCP/EthernetTCP.h"
+  #elif defined(PJON_STRATEGY_LOCALUDP)
     #include "strategies/LocalUDP/LocalUDP.h"
+  #elif defined(PJON_STRATEGY_OVERSAMPLING)
+    #include "strategies/OverSampling/OverSampling.h"
+  #elif defined(PJON_STRATEGY_BITBANG)
+    #include "strategies/SoftwareBitBang/SoftwareBitBang.h"
+  #elif defined(PJON_STRATEGY_SERIAL)
+    #include "strategies/ThroughSerial/ThroughSerial.h"
+  #elif defined(PJON_STRATEGY_NONE)
+  /* None for custom strategy include */
+  #else
+    #include "strategies/OverSampling/OverSampling.h"
+    #include "strategies/SoftwareBitBang/SoftwareBitBang.h"
+    #include "strategies/ThroughSerial/ThroughSerial.h"
+    /* Avoid ATtiny 45/85 error missing inclusion error */
+    #if !defined(__AVR_ATtiny45__) && !defined(__AVR_ATtiny85__)
+      #include "strategies/EthernetTCP/EthernetTCP.h"
+      #include "strategies/LocalUDP/LocalUDP.h"
+    #endif
   #endif
 
   template<typename Strategy = SoftwareBitBang>

README.md

@@ -9,7 +9,8 @@ PJON™ (Padded Jittering Operative Network) is an Arduino compatible, multi-mas
 
 ####Features
 - Configurable 2 level addressing (device and bus id) for scalable applications
-- Multi-media support with the data link layer abstraction or [Strategy](https://github.com/gioblu/PJON/tree/master/strategies) framework  
+- Multi-media support with the data link layer abstraction or [Strategy](https://github.com/gioblu/PJON/tree/master/strategies) framework
+- Configurable strategies inclusion (for memory optimisation)
 - Configurable 1 or 2 bytes packet length (max 255 or 65535 bytes)
 - Master-slave or multi-master [dynamic addressing](https://github.com/gioblu/PJON/blob/master/specification/PJON-dynamic-addressing-specification-v0.1.md)
 - Configurable synchronous and/or asynchronous [acknowledgement](https://github.com/gioblu/PJON/blob/master/specification/PJON-protocol-acknowledge-specification-v0.1.md) of correct packet sending

strategies/README.md

@@ -76,3 +76,16 @@ class YourStrategyName {
 
 Simply add your code in the functions declaration shown above and instantiate PJON using the strategy type you
 have created: `PJON<YourStrategyName> bus();`.
+
+### Memory optimisation
+By default all strategies files are included.
+
+To reduce memory footprint simply add for example `#define PJON_STRATEGY_BITBANG` before PJON include.
+
+Supported definitions:
+- `PJON_STRATEGY_ETHERNET` - EthernetTCP.h
+- `PJON_STRATEGY_LOCALUDP` - LocalUDP.h
+- `PJON_STRATEGY_OVERSAMPLING` - OverSampling.h
+- `PJON_STRATEGY_BITBANG` - SoftwareBitBang.h
+- `PJON_STRATEGY_SERIAL` - ThroughSerial.h
+- `PJON_STRATEGY_NONE` - don't include any strategy file