diff --git a/LampColorControler.ino b/LampColorControler.ino
index 77e6b15..a1b0efb 100644
--- a/LampColorControler.ino
+++ b/LampColorControler.ino
@@ -37,7 +37,7 @@ void setup() {
   // set up button colors and callbacks
   button::init();
 
-  if (!charger::is_usb_powered()) {
+  if (!charger::is_powered_on()) {
     startup_sequence();
   } else {
     shutdown();
diff --git a/src/system/behavior.cpp b/src/system/behavior.cpp
index e32dadc..55d07a0 100644
--- a/src/system/behavior.cpp
+++ b/src/system/behavior.cpp
@@ -128,6 +128,8 @@ void shutdown() {
 
   // do not power down when charger is plugged in
   if (!charger::is_powered_on()) {
+    digitalWrite(USB_33V_PWR, LOW);
+
     // power down nrf52.
     // on wake up, it'll start back from the setup phase
     systemOff(BUTTON_PIN, 0);
diff --git a/src/system/utils/constants.h b/src/system/utils/constants.h
index 79fe093..31310a0 100644
--- a/src/system/utils/constants.h
+++ b/src/system/utils/constants.h
@@ -64,10 +64,10 @@ constexpr float batteryLow = 5;       // %
 // pins
 
 // The button pin (one button pin to GND, the other to this pin)
-#define BUTTON_PIN D4
+static constexpr uint32_t BUTTON_PIN = D6;
 // Pins for the led on the button
-#define BUTTON_RED D5
-#define BUTTON_GREEN D7
-#define BUTTON_BLUE D6
+static constexpr uint32_t BUTTON_RED = D8;
+static constexpr uint32_t BUTTON_GREEN = D4;
+static constexpr uint32_t BUTTON_BLUE = D7;
 
 #endif
\ No newline at end of file
diff --git a/variants/Seed_XIAO_nRF52840/variant.cpp b/variants/Seed_XIAO_nRF52840/variant.cpp
index 5979585..e4e1a96 100644
--- a/variants/Seed_XIAO_nRF52840/variant.cpp
+++ b/variants/Seed_XIAO_nRF52840/variant.cpp
@@ -5,15 +5,15 @@
 #include "wiring_digital.h"
 
 const uint32_t g_ADigitalPinMap[] = {
-    2,   // D0 is P0.02/AIN0 (A0)
-    3,   // D1 is P0.03/AIN1 (A1)
-    28,  // D2 is P0.28/AIN4 (A2)
-    29,  // D3 is P0.29/AIN5 (A3)
-    42,  // D4 is P1.10
-    43,  // D5 is P1.11
-    44,  // D6 is P1.12
-    45,  // D7 is P1.13
-    46,  // D8 is P1.14
+    28,  // AD0 is P0.28/AIN4
+    29,  // AD1 is P0.29/AIN5
+    3,   // AD2 is P0.03/AIN1
+    2,   // AD3 is P0.02/AIN0
+    45,  // D4 is P1.13
+    46,  // D5 is P1.14
+    42,  // D6 is P1.10
+    44,  // D7 is P1.12
+    43,  // D8 is P1.11
 
     31,  // D9 is P0.31/AIN7: strip brightness
 
diff --git a/variants/Seed_XIAO_nRF52840/variant.h b/variants/Seed_XIAO_nRF52840/variant.h
index e4ac270..2e1457f 100644
--- a/variants/Seed_XIAO_nRF52840/variant.h
+++ b/variants/Seed_XIAO_nRF52840/variant.h
@@ -1,7 +1,7 @@
-#ifndef _SEEED_XIAO_NRF52840_H_
-#define _SEEED_XIAO_NRF52840_H_
+#ifndef _SEEED_XIAO_NRF52840_SENSE_H_
+#define _SEEED_XIAO_NRF52840_SENSE_H_
 
-#define TARGET_SEEED_XIAO_NRF52840
+#define TARGET_SEEED_XIAO_NRF52840_SENSE
 
 /** Master clock frequency */
 #define VARIANT_MCK (64000000ul)
@@ -25,7 +25,8 @@ extern "C" {
 #define NUM_ANALOG_OUTPUTS (0)
 
 // LEDs
-#define PIN_LED (LED_RED)
+#define LED_BLUE (PINS_COUNT)  // No connection
+#define PIN_LED (PINS_COUNT)
 #define LED_PWR (PINS_COUNT)
 #define PIN_NEOPIXEL (PINS_COUNT)
 #define NEOPIXEL_NUM (0)
@@ -35,11 +36,11 @@ extern "C" {
 // Buttons
 #define PIN_BUTTON1 (PINS_COUNT)
 
-// Digital PINs
-static const uint8_t D0 = 0;
-static const uint8_t D1 = 1;
-static const uint8_t D2 = 2;
-static const uint8_t D3 = 3;
+// Analog Digital PINs
+static const uint8_t AD0 = 0;
+static const uint8_t AD1 = 1;
+static const uint8_t AD2 = 2;
+static const uint8_t AD3 = 3;
 static const uint8_t D4 = 4;
 static const uint8_t D5 = 5;
 static const uint8_t D6 = 6;
@@ -52,11 +53,6 @@ static const uint8_t D8 = 8;
 #define PIN_A2 (2)
 #define PIN_A3 (3)
 
-static const uint8_t A0 = PIN_A0;
-static const uint8_t A1 = PIN_A1;
-static const uint8_t A2 = PIN_A2;
-static const uint8_t A3 = PIN_A3;
-
 // IO
 #define OUT_BRIGHTNESS (9)
 #define BAT21 (13)
@@ -114,6 +110,10 @@ static const uint8_t SS = 7;
 // with analyser, this will appear 1 bit shifted to the left
 #define BQ25703ADevaddr 0x6B
 
+// default address for the usb negociation component. When read
+// with analyser, this will appear 1 bit shifted to the left
+#define RT1715Devaddr 0x4E
+
 #ifdef __cplusplus
 }
 #endif