diff --git a/cpu/avr/radio/rf230bb/rf230bb.c b/cpu/avr/radio/rf230bb/rf230bb.c
index 9ee74f3f5..fc9005704 100644
--- a/cpu/avr/radio/rf230bb/rf230bb.c
+++ b/cpu/avr/radio/rf230bb/rf230bb.c
@@ -702,6 +702,27 @@ rf230_init(void)
     PRINTF("rf230: Unsupported manufacturer ID %u\n",tmanu);
 
   PRINTF("rf230: Version %u, ID %u\n",tvers,tmanu);
+  
+  rf230_warm_reset();
+ 
+ /* Start the packet receive process */
+  process_start(&rf230_process, NULL);
+ 
+ /* Leave radio in on state (?)*/
+  on();
+
+  return 1;
+}
+/*---------------------------------------------------------------------------*/
+/* Used to reinitialize radio parameters without losing pan and mac address, channel, power, etc. */
+void rf230_warm_reset(void) {
+#if RF230_CONF_SNEEZER && JACKDAW
+  /* Take jackdaw radio out of test mode */
+#warning Manipulating PORTB pins for RF230 Sneezer mode!
+  PORTB &= ~(1<<7);
+  DDRB  &= ~(1<<7);
+#endif
+  
   hal_register_write(RG_IRQ_MASK, RF230_SUPPORTED_INTERRUPT_MASK);
 
   /* Set up number of automatic retries 0-15 (0 implies PLL_ON sends instead of the extended TX_ARET mode */
@@ -738,19 +759,10 @@ rf230_init(void)
   hal_subregister_write(SR_TX_AUTO_CRC_ON, 1);
 #endif
 
-  /* Start the packet receive process */
-  process_start(&rf230_process, NULL);
-
 /* Limit tx power for testing miniature Raven mesh */
 #ifdef RF230_MAX_TX_POWER
   set_txpower(RF230_MAX_TX_POWER);  //0=3dbm 15=-17.2dbm
 #endif
-
-  /* Leave radio in on state (?)*/
-  on();
-
-  
-  return 1;
 }
 /*---------------------------------------------------------------------------*/
 static uint8_t buffer[RF230_MAX_TX_FRAME_LENGTH+AUX_LEN];
@@ -1509,3 +1521,46 @@ pending_packet(void)
   return pending;
 }
 /*---------------------------------------------------------------------------*/
+#if RF230_CONF_SNEEZER && JACKDAW
+/* See A.2 in the datasheet for the sequence needed.
+ * This version for RF230 only, hence Jackdaw.
+ * A full reset seems not necessary and allows keeping the pan address, etc.
+ * for an easy reset back to network mode.
+ */
+void rf230_start_sneeze(void) {
+//write buffer with random data for uniform spectral noise
+
+//uint8_t txpower = hal_register_read(0x05);  //save auto_crc bit and power
+//  hal_set_rst_low();
+//  hal_set_slptr_low();
+//  delay_us(TIME_RESET);
+//  hal_set_rst_high();
+    hal_register_write(0x0E, 0x01);
+    hal_register_write(0x02, 0x03);
+    hal_register_write(0x03, 0x10);
+ // hal_register_write(0x08, 0x20+26);    //channel 26
+    hal_subregister_write(SR_CCA_MODE,1); //leave channel unchanged
+
+ // hal_register_write(0x05, 0x00);       //output power maximum
+    hal_subregister_write(SR_TX_AUTO_CRC_ON, 0);  //clear AUTO_CRC, leave output power unchanged
+ 
+    hal_register_read(0x01);             //should be trx-off state=0x08  
+    hal_frame_write(buffer, 127);        //maximum length, random for spectral noise 
+
+    hal_register_write(0x36,0x0F);       //configure continuous TX
+    hal_register_write(0x3D,0x00);       //Modulated frame, other options are:
+//  hal_register_write(RG_TX_2,0x10);    //CW -2MHz
+//  hal_register_write(RG_TX_2,0x80);    //CW -500KHz
+//  hal_register_write(RG_TX_2,0xC0);    //CW +500KHz
+
+    DDRB  |= 1<<7;                       //Raven USB stick has PB7 connected to the RF230 TST pin.   
+    PORTB |= 1<<7;                       //Raise it to enable continuous TX Test Mode.
+
+    hal_register_write(0x02,0x09);       //Set TRX_STATE to PLL_ON
+    delay_us(TIME_TRX_OFF_TO_PLL_ACTIVE);
+    delay_us(TIME_PLL_LOCK);
+    delay_us(TIME_PLL_LOCK);
+ // while (hal_register_read(0x0f)!=1) {continue;}  //wait for pll lock-hangs
+    hal_register_write(0x02,0x02);       //Set TRX_STATE to TX_START
+}
+#endif
\ No newline at end of file
diff --git a/cpu/avr/radio/rf230bb/rf230bb.h b/cpu/avr/radio/rf230bb/rf230bb.h
index 718113c22..5cd424e56 100644
--- a/cpu/avr/radio/rf230bb/rf230bb.h
+++ b/cpu/avr/radio/rf230bb/rf230bb.h
@@ -202,6 +202,8 @@ typedef void (*radio_rx_callback) (uint16_t data);
 const struct radio_driver rf230_driver;
 
 int rf230_init(void);
+void rf230_warm_reset(void);
+void rf230_start_sneeze(void);
 //int rf230_on(void);
 //int rf230_off(void);
 void rf230_set_channel(uint8_t channel);
diff --git a/platform/avr-ravenusb/cdc_task.c b/platform/avr-ravenusb/cdc_task.c
index 1b0d46413..a53b8e400 100644
--- a/platform/avr-ravenusb/cdc_task.c
+++ b/platform/avr-ravenusb/cdc_task.c
@@ -116,9 +116,18 @@ static uint8_t timer = 0;
 static struct etimer et;
 
 #define CONVERTTXPOWER 1
-#if CONVERTTXPOWER  //adds 92 bytes to program flash size
+#if CONVERTTXPOWER  //adds ~120 bytes to program flash size
 const char txonesdigit[16]   PROGMEM = {'3','2','2','1','1','0','0','1','2','3','4','5','7','9','2','7'};
 const char txtenthsdigit[16] PROGMEM = {'0','6','1','6','1','5','2','2','2','2','2','2','2','2','2','2'};
+static void printtxpower(void) {
+    uint8_t power=rf230_get_txpower()&0xf;
+    char sign=(power<6?'+':'-');
+    char tens=(power>14?'1':'0');
+    char ones=pgm_read_byte(&txonesdigit[power]);
+    char tenths=pgm_read_byte(&txtenthsdigit[power]);
+    if (tens=='0') {tens=sign;sign=' ';}
+    PRINTF_P(PSTR("%c%c%c.%cdBm"),sign,tens,ones,tenths);
+}
 #endif
 
 PROCESS(cdc_process, "CDC serial process");
@@ -153,7 +162,7 @@ PROCESS_THREAD(cdc_process, ev, data_proc)
 					previous_stdout = stdout;
 					uart_usb_init();
 					uart_usb_set_stdout();
-					menu_print();
+				//	menu_print(); do this later
 				} else {
 					stdout = previous_stdout;
 				}
@@ -206,16 +215,21 @@ PROCESS_THREAD(cdc_process, ev, data_proc)
 void menu_print(void)
 {
 		PRINTF_P(PSTR("\n\r*********** Jackdaw Menu **********\n\r"));
-		PRINTF_P(PSTR("*                                 *\n\r"));
+		PRINTF_P(PSTR("        [Built "__DATE__"]      \n\r"));
+//		PRINTF_P(PSTR("*                                 *\n\r"));
 		PRINTF_P(PSTR("*  m        Print current mode    *\n\r"));
 		PRINTF_P(PSTR("*  s        Set to sniffer mode   *\n\r"));
 		PRINTF_P(PSTR("*  n        Set to network mode   *\n\r"));
 		PRINTF_P(PSTR("*  c        Set RF channel        *\n\r"));
+		PRINTF_P(PSTR("*  p        Set RF power          *\n\r"));
 		PRINTF_P(PSTR("*  6        Toggle 6lowpan        *\n\r"));
 		PRINTF_P(PSTR("*  r        Toggle raw mode       *\n\r"));
 #if USB_CONF_RS232
 		PRINTF_P(PSTR("*  d        Toggle RS232 output   *\n\r"));
 #endif
+#if RF230BB && RF230_CONF_SNEEZER
+		PRINTF_P(PSTR("*  S        Enable sneezer mode   *\n\r"));
+#endif
 #if UIP_CONF_IPV6_RPL
 		PRINTF_P(PSTR("*  N        RPL Neighbors         *\n\r"));
 		PRINTF_P(PSTR("*  G        RPL Global Repair     *\n\r"));
@@ -227,12 +241,11 @@ void menu_print(void)
 		if(bootloader_is_present())
 		PRINTF_P(PSTR("*  D        Switch to DFU mode    *\n\r"));
 		PRINTF_P(PSTR("*  R        Reset (via WDT)       *\n\r"));
-        PRINTF_P(PSTR("*  h,?      Print this menu       *\n\r"));
+		PRINTF_P(PSTR("*  h,?      Print this menu       *\n\r"));
 		PRINTF_P(PSTR("*                                 *\n\r"));
 		PRINTF_P(PSTR("* Make selection at any time by   *\n\r"));
 		PRINTF_P(PSTR("* pressing your choice on keyboard*\n\r"));
 		PRINTF_P(PSTR("***********************************\n\r"));
-		PRINTF_P(PSTR("[Built "__DATE__"]\n\r"));
 }
 
 #if UIP_CONF_IPV6_RPL
@@ -266,11 +279,12 @@ void menu_process(char c)
 	static enum menustate_enum            /* Defines an enumeration type    */
 	{
 		normal,
-		channel
+		channel,
+        txpower
 	} menustate = normal;
 	
 	static char channel_string[3];
-	static uint8_t channel_string_i = 0;
+	static uint8_t channel_string_i;// = 0;
 	
 	int tempchannel;
 
@@ -295,14 +309,14 @@ void menu_process(char c)
 					} else {
 #endif
 #if JACKDAW_CONF_USE_SETTINGS
-						if(settings_set_uint8(SETTINGS_KEY_CHANNEL, tempchannel)!=SETTINGS_STATUS_OK) {
-							PRINTF_P(PSTR("\n\rChannel changed to %d, but unable to store in EEPROM!\n\r"),tempchannel);
-						} else
+						if(settings_set_uint8(SETTINGS_KEY_CHANNEL, tempchannel)==SETTINGS_STATUS_OK) {                       
+                            PRINTF_P(PSTR("\n\rChannel changed to %d and stored in EEPROM.\n\r"),tempchannel);
+						} else {
+                            PRINTF_P(PSTR("\n\rChannel changed to %d, but unable to store in EEPROM!\n\r"),tempchannel);
+                        }
 #else
-						eeprom_write_byte((uint8_t *) 9, tempchannel);   //Write channel
-						eeprom_write_byte((uint8_t *)10, ~tempchannel); //Bit inverse as check
+						PRINTF_P(PSTR("\n\rChannel changed to %d.\n\r"),tempchannel);
 #endif
-						PRINTF_P(PSTR("\n\rChannel changed to %d and stored in EEPROM.\n\r"),tempchannel);
 					}
 				} else {
 					PRINTF_P(PSTR("\n\rChannel unchanged.\n\r"));
@@ -346,11 +360,87 @@ void menu_process(char c)
 			default:
 				break;
 		}
+	} else if (menustate == txpower) {
 
+		switch(c) {
+			case '\r':
+			case '\n':		
+								
+				if (channel_string_i)  {
+					channel_string[channel_string_i] = 0;
+					tempchannel = atoi(channel_string);
+#if RF230BB
+					if ((tempchannel < 0) || (tempchannel > 15))  {
+						PRINTF_P(PSTR("\n\rInvalid input\n\r"));
+					} else {
+                    	PRINTF_P(PSTR(" ")); //for some reason needs a print here to clear the string input...
+						rf230_set_txpower(tempchannel);
+#else
+					if(radio_set_tx_power_level(tempchannel)!=RADIO_SUCCESS) {
+						PRINTF_P(PSTR("\n\rInvalid input\n\r"));
+					} else {
+#endif
+#if JACKDAW_CONF_USE_SETTINGS
+						if(settings_set_uint8(SETTINGS_KEY_TXPOWER, tempchannel)==SETTINGS_STATUS_OK) {
+							PRINTF_P(PSTR("\n\rTransmit power changed to %d, and stored in EEPROM.\n\r"),tempchannel);
+						} else {
+							PRINTF_P(PSTR("\n\rTransmit power changed to %d, but unable to store in EEPROM!\n\r"),tempchannel);
+						}
+#else
+						PRINTF_P(PSTR("\n\rTransmit power changed to %d.\n\r"),tempchannel);
+#endif
+					}
+				} else {
+					PRINTF_P(PSTR("\n\rTransmit power unchanged.\n\r"));
+				}
 
+				menustate = normal;
+				break;
+		
+			case '\b':
+			
+				if (channel_string_i) {
+					channel_string_i--;
+					PRINTF_P(PSTR("\b \b"));
+				}
+				break;
+					
+			case '0':
+			case '1':
+			case '2':
+			case '3':
+			case '4':
+			case '5':
+			case '6':
+			case '7':
+			case '8':
+			case '9':
+				if (channel_string_i > 1) {
+					// This time the user has gone too far.
+					// Beep at them.
+					putc('\a', stdout);
+					//uart_usb_putchar('\a');
+					break;
+				}
+				putc(c, stdout);
+				//uart_usb_putchar(c);
+				
+				channel_string[channel_string_i] = c;
+				channel_string_i++;
+				break;
+
+			default:
+				break;
+		}
+ 
 	} else {
 
 		uint8_t i;
+
+        /* Any attempt to read an RF230 register in sneeze mode (e.g. rssi) will hang the MCU */
+        /* So convert any command into a sneeze off */
+        if (usbstick_mode.sneeze) c='S';
+
 		switch(c) {
 			case '\r':
 			case '\n':
@@ -369,9 +459,10 @@ void menu_process(char c)
 				PRINTF_P(PSTR("Bringing interface up\n\r"));
 				usb_eth_set_active(1);
 				break;
-
-			case 't':
+#if JACKDAW_CONF_RANDOM_MAC
+			case 'T':
 				// Test "strong" random number generator of R Quattlebaum
+                // This can potentially reboot the stick!
 				PRINTF_P(PSTR("RNG Output: "));
 				{
 					uint8_t value = rng_get_uint8();
@@ -384,24 +475,49 @@ void menu_process(char c)
 					watchdog_periodic();
 				}
 				break;
-
+#endif
 			case 's':
 				PRINTF_P(PSTR("Jackdaw now in sniffer mode\n\r"));
 				usbstick_mode.sendToRf = 0;
 				usbstick_mode.translate = 0;
 #if RF230BB
-                rf230_listen_channel(rf230_get_channel());
+				rf230_listen_channel(rf230_get_channel());
 #else		
-			    radio_set_trx_state(RX_ON);
+				radio_set_trx_state(RX_ON);
 #endif
 				break;
 
+#if RF230BB && RF230_CONF_SNEEZER
+ 			case 'S':
+ 				if (usbstick_mode.sneeze) {
+					rf230_warm_reset();
+					PRINTF_P(PSTR("Jackdaw now behaving itself.\n\r"));
+					usbstick_mode.sneeze = 0;
+				} else {
+					if (rf230_get_txpower()<3)
+						PRINTF_P(PSTR("*****WARNING Radio may overheat in this mode*******\n\r"));
+					rf230_start_sneeze();
+					PRINTF_P(PSTR("********Jackdaw is continuously broadcasting*******\n\r"));
+#if CONVERTTXPOWER
+					PRINTF_P(PSTR("*********on channel %2d with power "),rf230_get_channel());
+					printtxpower();
+					PRINTF_P(PSTR("*********\n\r"));
+#else
+					PRINTF_P(PSTR("************on channel %2d with power %2d************\n\r"),rf230_get_channel(),rf230_get_txpower());
+#endif
+					PRINTF_P(PSTR("Press any key to stop.\n\r"));
+					watchdog_periodic();
+					usbstick_mode.sneeze = 1;
+				}
+				break;
+#endif
+
 			case 'n':
 				PRINTF_P(PSTR("Jackdaw now in network mode\n\r"));
 				usbstick_mode.sendToRf = 1;
 				usbstick_mode.translate = 1;
 #if RF230BB
-                rf230_set_channel(rf230_get_channel());
+				rf230_set_channel(rf230_get_channel());
 #else		
 			    radio_set_trx_state(RX_AACK_ON);  //TODO: Use startup state which may be RX_ON
 #endif
@@ -442,14 +558,25 @@ void menu_process(char c)
 
 			case 'c':
 #if RF230BB
-				PRINTF_P(PSTR("Select 802.15.4 Channel in range 11-26 [%d]: "), rf230_get_channel());
+				PRINTF_P(PSTR("\nSelect 802.15.4 Channel in range 11-26 [%d]: "), rf230_get_channel());
 #else
-				PRINTF_P(PSTR("Select 802.15.4 Channel in range 11-26 [%d]: "), radio_get_operating_channel());
+				PRINTF_P(PSTR("\nSelect 802.15.4 Channel in range 11-26 [%d]: "), radio_get_operating_channel());
 #endif
 				menustate = channel;
 				channel_string_i = 0;
 				break;
 
+			case 'p':
+#if RF230BB
+				PRINTF_P(PSTR("\nSelect transmit power (0=+3dBm 15=-17.2dBm) [%d]: "), rf230_get_txpower());
+#else
+//				PRINTF_P(PSTR("\nSelect transmit power (0=+3dBm 15=-17.2dBm) [%d]: "), ?_power());;
+#endif
+				menustate = txpower;
+				channel_string_i = 0;
+				break;
+
+
 #if UIP_CONF_IPV6_RPL
 #include "rpl.h"
 extern uip_ds6_nbr_t uip_ds6_nbr_cache[];
@@ -457,13 +584,13 @@ extern uip_ds6_route_t uip_ds6_routing_table[];
 extern uip_ds6_netif_t uip_ds6_if;
 			case 'N':
 			{	uint8_t i,j;
-                PRINTF_P(PSTR("\n\rAddresses [%u max]\n\r"),UIP_DS6_ADDR_NB);
-                for (i=0;i<UIP_DS6_ADDR_NB;i++) {
-                    if (uip_ds6_if.addr_list[i].isused) {	  
-                        ipaddr_add(&uip_ds6_if.addr_list[i].ipaddr);
-                        PRINTF_P(PSTR("\n\r"));
-                    }
-                }
+				PRINTF_P(PSTR("\n\rAddresses [%u max]\n\r"),UIP_DS6_ADDR_NB);
+				for (i=0;i<UIP_DS6_ADDR_NB;i++) {
+					if (uip_ds6_if.addr_list[i].isused) {	  
+						ipaddr_add(&uip_ds6_if.addr_list[i].ipaddr);
+						PRINTF_P(PSTR("\n\r"));
+					}
+				}
 				PRINTF_P(PSTR("\n\rNeighbors [%u max]\n\r"),UIP_DS6_NBR_NB);
 				for(i = 0,j=1; i < UIP_DS6_NBR_NB; i++) {
 					if(uip_ds6_nbr_cache[i].isused) {
@@ -550,24 +677,19 @@ extern uip_ds6_netif_t uip_ds6_if;
 				);
 #if RF230BB
 #if CONVERTTXPOWER
-                {
-                uint8_t power=rf230_get_txpower()&0xf;
-                char sign=(power<6?'+':'-');
-                char tens=(power>14?'1':'0');
-                char ones=pgm_read_byte(&txonesdigit[power]);
-                char tenths=pgm_read_byte(&txtenthsdigit[power]);
-                PRINTF_P(PSTR("  * Operates on channel %d with TX power %c%c%c.%cdBm\n\r"), rf230_get_channel(),sign,tens,ones,tenths);
-                }
+				PRINTF_P(PSTR("  * Operates on channel %d with TX power "),rf230_get_channel());
+				printtxpower();
+				PRINTF_P(PSTR("\n\r"));
 #else  //just show the raw value          
 				PRINTF_P(PSTR("  * Operates on channel %d\n\r"), rf230_get_channel());
-				PRINTF_P(PSTR("  * TX Power(0=3dBm, 15=-17.2dBm): %d\n\r"), rf230_get_txpower());
+				PRINTF_P(PSTR("  * TX Power(0=+3dBm, 15=-17.2dBm): %d\n\r"), rf230_get_txpower());
 #endif
-                if (rf230_smallest_rssi) {
-                    PRINTF_P(PSTR("  * Current/Last/Smallest RSSI: %d/%d/%ddBm\n\r"), -91+(rf230_rssi()-1), -91+(rf230_last_rssi-1),-91+(rf230_smallest_rssi-1));
-                    rf230_smallest_rssi=0;
-                } else {
-                    PRINTF_P(PSTR("  * Current/Last/Smallest RSSI: %d/%d/--dBm\n\r"), -91+(rf230_rssi()-1), -91+(rf230_last_rssi-1));
-                }
+				if (rf230_smallest_rssi) {
+					PRINTF_P(PSTR("  * Current/Last/Smallest RSSI: %d/%d/%ddBm\n\r"), -91+(rf230_rssi()-1), -91+(rf230_last_rssi-1),-91+(rf230_smallest_rssi-1));
+					rf230_smallest_rssi=0;
+				} else {
+					PRINTF_P(PSTR("  * Current/Last/Smallest RSSI: %d/%d/--dBm\n\r"), -91+(rf230_rssi()-1), -91+(rf230_last_rssi-1));
+				}
 
 #else /* RF230BB */
 				PRINTF_P(PSTR("  * Operates on channel %d\n\r"), radio_get_operating_channel());
@@ -584,8 +706,8 @@ extern uip_ds6_netif_t uip_ds6_if;
 #endif /* RF230BB */
 
 				PRINTF_P(PSTR("  * Configuration: %d, USB<->ETH is "), usb_configuration_nb);
-                if (usb_eth_is_active == 0) PRINTF_P(PSTR("not "));
-                PRINTF_P(PSTR("active\n\r"));
+				if (usb_eth_is_active == 0) PRINTF_P(PSTR("not "));
+				PRINTF_P(PSTR("active\n\r"));
 
 #if CONFIG_STACK_MONITOR
 /* See contiki-raven-main.c for initialization of the magic numbers */
@@ -601,7 +723,7 @@ uint16_t p=(uint16_t)&__bss_end;
     } while (p<RAMEND-100);
 }
 #endif
-             
+
 				break;
 
 			case 'e':
@@ -624,7 +746,7 @@ uint16_t p=(uint16_t)&__bss_end;
 					for(j=0;j<(1<<12);j++) {
 						for(i=11;i<=26;i++) {
 #if RF230BB
-                            rf230_listen_channel(i);
+							rf230_listen_channel(i);
 #else // RF230BB
 							radio_set_operating_channel(i);
 #endif
@@ -633,7 +755,7 @@ uint16_t p=(uint16_t)&__bss_end;
 							RSSI = rf230_rssi();  //multiplies rssi register by 3 for consistency with energy-detect register
 #else // RF230BB
 							radio_get_rssi_value(&RSSI);
-                            RSSI*=3;
+							RSSI*=3;
 #endif
 							maxRSSI[i-11]=Max(maxRSSI[i-11],RSSI);
 							accRSSI[i-11]+=RSSI;
diff --git a/platform/avr-ravenusb/contiki-conf.h b/platform/avr-ravenusb/contiki-conf.h
index f89d99066..63f6ec525 100644
--- a/platform/avr-ravenusb/contiki-conf.h
+++ b/platform/avr-ravenusb/contiki-conf.h
@@ -81,7 +81,7 @@ unsigned long clock_seconds(void);
 #define RIME_CONF_BROADCAST_ANNOUNCEMENT_MAX_TIME CLOCK_CONF_SECOND * 524UL /* Default uses 600UL */
 #define COLLECT_CONF_BROADCAST_ANNOUNCEMENT_MAX_TIME CLOCK_CONF_SECOND * 524UL /* Default uses 600UL */
 
-/* Get Mac address, RF channel, PANID from EEPROM settings manager, or use hard-coded values? */
+/* Use EEPROM settings manager, or hard-coded EEPROM reads? */
 /* Generate random MAC address on first startup? */
 /* Random number from radio clock skew or ADC noise? */
 #define JACKDAW_CONF_USE_SETTINGS		0
@@ -273,10 +273,18 @@ extern void mac_log_802_15_4_rx(const uint8_t* buffer, size_t total_len);
 /* CCA theshold energy -91 to -61 dBm (default -77). Set this smaller than the expected minimum rssi to avoid packet collisions */
 /* The Jackdaw menu 'm' command is helpful for determining the smallest ever received rssi */
 #define RF230_CONF_CCA_THRES    -85
+/* Allow sneeze command from jackdaw menu. Useful for testing CCA on other radios */
+/* During sneezing, any access to an RF230 register will hang the MCU and cause a watchdog reset */
+/* The host interface, jackdaw menu and rf230_send routines are temporarily disabled to prevent this */
+/* But some calls from an internal uip stack might get through, e.g. from CCA or low power protocols, */
+/* as temporarily disabling all the possible accesses would add considerable complication to the radio driver! */
+#define RF230_CONF_SNEEZER        1
 /* Allow 6loWPAN fragmentation (more efficient for large payloads over a reliable channel) */
 #define SICSLOWPAN_CONF_FRAG      1
 /* Timeout for fragment reassembly. A reissued browser GET will also cancel reassembly, typically in 2-3 seconds */
 #define SICSLOWPAN_CONF_MAXAGE    3
+/* Allow sneeze command from jackdaw menu */
+#define RF230_CONF_SNEEZE         1
 
 #elif 0  /* Contiki-mac radio cycling */
 #define NETSTACK_CONF_MAC         nullmac_driver
diff --git a/platform/avr-ravenusb/sicslow_ethernet.c b/platform/avr-ravenusb/sicslow_ethernet.c
index eea6366b6..7159b7d4d 100644
--- a/platform/avr-ravenusb/sicslow_ethernet.c
+++ b/platform/avr-ravenusb/sicslow_ethernet.c
@@ -311,6 +311,7 @@ void mac_ethernetSetup(void)
   usbstick_mode.translate = 1;
   usbstick_mode.debugOn= 1;
   usbstick_mode.raw = 0;
+  usbstick_mode.sneeze=0;
 
 #if !RF230BB
   sicslowinput = pinput;
@@ -339,14 +340,14 @@ void mac_ethernetToLowpan(uint8_t * ethHeader)
    return;
    #endif
 
-  // In sniffer mode we don't ever send anything
-  if (usbstick_mode.sendToRf == 0) {
+  /* In sniffer or sneezr mode we don't ever send anything */
+  if ((usbstick_mode.sendToRf == 0) || (usbstick_mode.sneeze != 0)) {
     uip_len = 0;
     return;
   }
 
 
-  //If not IPv6 we don't do anything
+  /* If not IPv6 we don't do anything. Disable ipv4 on the interface to prevent possible hangs from discovery packet flooding */
   if (((struct uip_eth_hdr *) ethHeader)->type != UIP_HTONS(UIP_ETHTYPE_IPV6)) {
     PRINTF("eth2low: Dropping packet w/type=0x%04x\n",uip_ntohs(((struct uip_eth_hdr *) ethHeader)->type));
   //      printf("!ipv6");
@@ -1043,10 +1044,12 @@ mac_log_802_15_4_rx(const uint8_t* buf, size_t len) {
     usb_eth_send(raw_buf, sendlen, 0);
   }
 }
-
+/* The rf230bb send driver may call this routine via  RF230BB_HOOK_IS_SEND_ENABLED */
 bool
 mac_is_send_enabled(void) {
-	return usbstick_mode.sendToRf;
+  if ((usbstick_mode.sendToRf == 0) || (usbstick_mode.sneeze != 0)) return 0;
+  return 1;
+//return usbstick_mode.sendToRf;
 }
 
 /** @} */
diff --git a/platform/avr-ravenusb/sicslow_ethernet.h b/platform/avr-ravenusb/sicslow_ethernet.h
index 4a5b632b1..b5956b470 100644
--- a/platform/avr-ravenusb/sicslow_ethernet.h
+++ b/platform/avr-ravenusb/sicslow_ethernet.h
@@ -65,6 +65,7 @@ typedef struct {
 	uint8_t translate	:1;
 	uint8_t raw         :1;
 	uint8_t debugOn     :1;
+    uint8_t sneeze      :1;
 } usbstick_mode_t;