add extra latency needed for enhanced mode

src/lib/ebus/device.cpp

@@ -79,7 +79,7 @@ namespace ebusd {
 Device::Device(const char* name, bool checkDevice, unsigned int latency, bool readOnly, bool initialSend,
     bool enhancedProto)
   : m_name(name), m_checkDevice(checkDevice),
-    m_latency(HOST_LATENCY_MS+latency), m_readOnly(readOnly), m_initialSend(initialSend),
+    m_latency(HOST_LATENCY_MS+(enhancedProto?ENHANCED_LATENCY_MS:0)+latency), m_readOnly(readOnly), m_initialSend(initialSend),
     m_enhancedProto(enhancedProto), m_fd(-1), m_listener(nullptr), m_arbitrationMaster(SYN),
     m_arbitrationCheck(false), m_bufSize(((MAX_LEN+1+3)/4)*4), m_bufLen(0), m_bufPos(0),
     m_extraFatures(0), m_infoId(0xff), m_infoLen(0), m_infoPos(0) {

src/lib/ebus/device.h

@@ -43,6 +43,9 @@ namespace ebusd {
 /** the transfer latency of the network device [ms]. */
 #define NETWORK_LATENCY_MS 30
 
+/** the extra transfer latency to take into account for enhanced protocol. */
+#define ENHANCED_LATENCY_MS 10
+
 /** the latency of the host [ms]. */
 #if defined(__CYGWIN__) || defined(_WIN32)
 #define HOST_LATENCY_MS 20