diff --git a/platformio.ini b/platformio.ini
index 4e3045c2..2ed1d992 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -9,14 +9,14 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [platformio]
-default_envs = tbeam
+;default_envs = tbeam
 ;default_envs = tbeam0.7
 ;default_envs = heltec-v2.0
 ;default_envs = tlora-v1
 ;default_envs = tlora_v1_3
 ;default_envs = tlora-v2
 ;default_envs = lora-relay-v1 # nrf board
-;default_envs = t-echo
+default_envs = t-echo
 ;default_envs = nrf52840dk-geeksville
 ;default_envs = native # lora-relay-v1 # nrf52840dk-geeksville # linux # or if you'd like to change the default to something like lora-relay-v1 put that here
 ;default_envs = rak4631
@@ -218,7 +218,7 @@ src_filter =
   ${arduino_base.src_filter} -<esp32/> -<nimble/> -<mesh/wifi/> -<mesh/http/> -<plugins/esp32> -<mqtt/>
 lib_ignore =
   BluetoothOTA
-monitor_port = /dev/ttyACM1
+; monitor_port = /dev/ttyACM1
 
 # we pass in options to jlink so it can understand freertos (note: we don't use "jlink" as the tool)
 ;debug_tool = jlink
@@ -255,9 +255,12 @@ debug_init_break =
 [nrf52840_base]
 ; Common base class for all nrf52840 based targets
 extends = nrf52_base
+; was -DTINY_USB
+build_flags = ${nrf52_base.build_flags} 
 lib_deps =
   ${arduino_base.lib_deps}
   Adafruit nRFCrypto 
+  # Adafruit TinyUSB Arduino
   # add Adafruit nRFCrypto platform IO automated scan is broken
 
 [env:lora_isp4520]
@@ -315,7 +318,7 @@ extends = nrf52840_base
 board = wiscore_rak4631
 # add our variants files to the include and src paths
 # define build flags for the TFT_eSPI library
-build_flags = ${nrf52_base.build_flags} -Ivariants/WisCore_RAK4631_Board
+build_flags = ${nrf52840_base.build_flags} -Ivariants/WisCore_RAK4631_Board
 src_filter = ${nrf52_base.src_filter} +<../variants/WisCore_RAK4631_Board>
 debug_tool = jlink
 ; If not set we will default to uploading over serial (first it forces bootloader entry by talking 1200bps to cdcacm)
@@ -354,10 +357,12 @@ lib_deps =
 [env:t-echo]
 extends = nrf52840_base
 board = t-echo
+debug_tool = jlink
+upload_protocol = jlink
 # add our variants files to the include and src paths
 # define build flags for the TFT_eSPI library - NOTE: WE NOT LONGER USE TFT_eSPI, it was for an earlier version of the TTGO eink screens
 # -DBUSY_PIN=3 -DRST_PIN=2 -DDC_PIN=28 -DCS_PIN=30
-build_flags = ${nrf52_base.build_flags} -Ivariants/t-echo 
+build_flags = ${nrf52840_base.build_flags} -Ivariants/t-echo 
 src_filter = ${nrf52_base.src_filter} +<../variants/t-echo>
 lib_deps = 
   ${nrf52840_base.lib_deps}
@@ -385,7 +390,7 @@ extends = nrf52840_base
 board = lora-relay-v1
 # add our variants files to the include and src paths
 # define build flags for the TFT_eSPI library
-build_flags = ${nrf52_base.build_flags} -Ivariants/lora_relay_v1
+build_flags = ${nrf52840_base.build_flags} -Ivariants/lora_relay_v1
   -DUSER_SETUP_LOADED
   -DTFT_WIDTH=80
   -DTFT_HEIGHT=160
@@ -407,7 +412,7 @@ extends = nrf52840_base
 board = lora-relay-v2
 # add our variants files to the include and src paths
 # define build flags for the TFT_eSPI library
-build_flags = ${nrf52_base.build_flags} -Ivariants/lora_relay_v2
+build_flags = ${nrf52840_base.build_flags} -Ivariants/lora_relay_v2
   -DUSER_SETUP_LOADED
   -DTFT_WIDTH=80
   -DTFT_HEIGHT=160
diff --git a/src/nrf52/main-nrf52.cpp b/src/nrf52/main-nrf52.cpp
index 6325bac8..647aefe2 100644
--- a/src/nrf52/main-nrf52.cpp
+++ b/src/nrf52/main-nrf52.cpp
@@ -5,6 +5,7 @@
 #include <ble_gap.h>
 #include <memory.h>
 #include <stdio.h>
+#include <Adafruit_USBD_Device.h>
 
 #include "NRF52Bluetooth.h"
 #include "error.h"
@@ -20,7 +21,8 @@ static inline void debugger_break(void)
 }
 
 bool loopCanSleep() {
-    return !tud_cdc_connected();
+    // turn off sleep only while connected via USB
+    return !(TinyUSBDevice.mounted() && !TinyUSBDevice.suspended());
 }
 
 // handle standard gcc assert failures
@@ -37,7 +39,7 @@ void getMacAddr(uint8_t *dmac)
     ble_gap_addr_t addr;
     if (sd_ble_gap_addr_get(&addr) == NRF_SUCCESS) {
         memcpy(dmac, addr.addr, 6);
-    } else {
+    } else { 
         const uint8_t *src = (const uint8_t *)NRF_FICR->DEVICEADDR;
         dmac[5] = src[0];
         dmac[4] = src[1];