diff --git a/apps/er-coap-07/er-coap-07-engine.c b/apps/er-coap-07/er-coap-07-engine.c
index 47bbccd90..a6a1dc573 100644
--- a/apps/er-coap-07/er-coap-07-engine.c
+++ b/apps/er-coap-07/er-coap-07-engine.c
@@ -153,7 +153,14 @@ handle_incoming_data(void)
               if (coap_error_code==NO_ERROR)
               {
                 /* Apply blockwise transfers. */
-                if ( IS_OPTION(message, COAP_OPTION_BLOCK2) )
+                if ( IS_OPTION(message, COAP_OPTION_BLOCK1) && response->code<BAD_REQUEST_4_00 && !IS_OPTION(response, COAP_OPTION_BLOCK1) )
+                {
+                  PRINTF("Block1 NOT IMPLEMENTED\n");
+
+                  coap_error_code = NOT_IMPLEMENTED_5_01;
+                  coap_error_message = "NoBlock1Support";
+                }
+                else if ( IS_OPTION(message, COAP_OPTION_BLOCK2) )
                 {
                   /* unchanged new_offset indicates that resource is unaware of blockwise transfer */
                   if (new_offset==block_offset)
@@ -207,8 +214,8 @@ handle_incoming_data(void)
           } /* if (service callback) */
 
         } else {
-            coap_error_code = MEMORY_ALLOCATION_ERROR;
-            coap_error_message = "Transaction buffer allocation failed";
+            coap_error_code = SERVICE_UNAVAILABLE_5_03;
+            coap_error_message = "NoFreeTraBuffer";
         } /* if (transaction buffer) */
       }
       else
diff --git a/apps/er-coap-07/er-coap-07.c b/apps/er-coap-07/er-coap-07.c
index 70d13d2e9..6d21aed77 100644
--- a/apps/er-coap-07/er-coap-07.c
+++ b/apps/er-coap-07/er-coap-07.c
@@ -697,10 +697,12 @@ coap_parse_message(void *packet, uint8_t *data, uint16_t data_len)
           PRINTF("Block2 [%lu%s (%u B/blk)]\n", coap_pkt->block2_num, coap_pkt->block2_more ? "+" : "", coap_pkt->block2_size);
           break;
         case COAP_OPTION_BLOCK1:
-          PRINTF("Block1 NOT IMPLEMENTED\n");
-          /*TODO implement */
-          coap_error_message = "Blockwise POST/PUT not supported";
-          return NOT_IMPLEMENTED_5_01;
+          coap_pkt->block1_num = parse_int_option(current_option, option_len);
+          coap_pkt->block1_more = (coap_pkt->block1_num & 0x08)>>3;
+          coap_pkt->block1_size = 16 << (coap_pkt->block1_num & 0x07);
+          coap_pkt->block1_offset = (coap_pkt->block1_num & ~0x0000000F)<<(coap_pkt->block1_num & 0x07);
+          coap_pkt->block1_num >>= 4;
+          PRINTF("Block1 [%lu%s (%u B/blk)]\n", coap_pkt->block1_num, coap_pkt->block1_more ? "+" : "", coap_pkt->block1_size);
           break;
         case COAP_OPTION_IF_NONE_MATCH:
           coap_pkt->if_none_match = 1;
@@ -779,7 +781,11 @@ coap_set_status_code(void *packet, unsigned int code)
 unsigned int
 coap_get_header_content_type(void *packet)
 {
-  return ((coap_packet_t *)packet)->content_type;
+  coap_packet_t *const coap_pkt = (coap_packet_t *) packet;
+
+  if (!IS_OPTION(coap_pkt, COAP_OPTION_CONTENT_TYPE)) return -1;
+
+  return coap_pkt->content_type;
 }
 
 int
diff --git a/examples/er-rest-example/Makefile b/examples/er-rest-example/Makefile
index c10d11482..1cdae1b5e 100644
--- a/examples/er-rest-example/Makefile
+++ b/examples/er-rest-example/Makefile
@@ -1,4 +1,4 @@
-all: rest-server-example coap-client-example
+all: rest-server-example coap-client-example plugtest-server
 
 CONTIKI=../..
 CFLAGS += -DPROJECT_CONF_H=\"project-conf.h\"
@@ -25,6 +25,8 @@ else
 ${info INFO: compiling without RPL}
 UIP_CONF_RPL=0
 CFLAGS += -DUIP_CONF_ND6_DEF_MAXDADNS=0
+CFLAGS += -DHARD_CODED_ADDRESS=\"fdfd::10\"
+CFLAGS += -DUIP_CONF_BUFFER_SIZE=1280
 endif
 
 # linker optimizations
@@ -78,3 +80,6 @@ connect-router:	$(CONTIKI)/tools/tunslip6
 
 connect-router-cooja:	$(CONTIKI)/tools/tunslip6
 	sudo $(CONTIKI)/tools/tunslip6 -a 127.0.0.1 aaaa::1/64
+
+tap0up:
+	sudo ip address add fdfd::1/64 dev tap0