 
 
 
-          OTV0P2BASE::serialPrintlnAndFlush("!TX not impl"); // FAIL
+          OTV0P2BASE::serialPrintlnAndFlush(F("!TX not impl")); // FAIL
 #endif // !defined(ENABLE_OTSECUREFRAME_ENCODING_SUPPORT) 
           }
         }

#else
  uint8_t key[16];
  if(!OTV0P2BASE::getPrimaryBuilding16ByteSecretKey(key))
    { OTV0P2BASE::serialPrintlnAndFlush("!TX key"); return(false); } // FAIL
  const OTRadioLink::SimpleSecureFrame32or0BodyTXBase::fixed32BTextSize12BNonce16BTagSimpleEnc_ptr_t e = OTAESGCM::fixed32BTextSize12BNonce16BTagSimpleEnc_DEFAULT_STATELESS;
  uint8_t buf[OTRadioLink::SimpleSecureFrame32or0BodyTXBase::generateSecureBeaconMaxBufSize];
  const uint8_t bodylen = secureTXState.generateSecureBeaconRawForTX(buf, sizeof(buf), lenTXID, e, NULL, key); // 2 byte ID.

          // Secure: wrap frame in encrypted layer...
          uint8_t key[16];
          if(!OTV0P2BASE::getPrimaryBuilding16ByteSecretKey(key))
            { OTV0P2BASE::serialPrintlnAndFlush(F("!TX key")); return(false); } // FAIL
          const OTRadioLink::SimpleSecureFrame32or0BodyTXBase::fixed32BTextSize12BNonce16BTagSimpleEnc_ptr_t e = OTAESGCM::fixed32BTextSize12BNonce16BTagSimpleEnc_DEFAULT_STATELESS;
          uint8_t buf[OTRadioLink::SecurableFrameHeader::maxSmallFrameSize];

