diff --git a/.gitignore b/.gitignore
index d07ebf6..94818e5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,6 @@
 
 # Emacs dir locals (optional)
 .dir-locals.el
+/hold/
+.platformio_local/
+
diff --git a/docs/microreticulum_firmware_migration.md b/docs/microreticulum_firmware_migration.md
index be912f7..d7c2584 100644
--- a/docs/microreticulum_firmware_migration.md
+++ b/docs/microreticulum_firmware_migration.md
@@ -29,6 +29,9 @@ so this repo consumes existing T-Beam SUPREME integration instead of duplicating
    - integration paths (from `microReticulum_Firmware`)
 6. After parity validation, remove or archive `external/microReticulum`.
 
+Step-2 inventory output:
+- `docs/microreticulum_firmware_step2_adoption_matrix.md`
+
 ## Validation Checklist
 - Build passes for all key exercises.
 - SD/RTC/GPS startup behavior remains stable.
diff --git a/docs/microreticulum_firmware_step2_adoption_matrix.md b/docs/microreticulum_firmware_step2_adoption_matrix.md
new file mode 100644
index 0000000..ea614d8
--- /dev/null
+++ b/docs/microreticulum_firmware_step2_adoption_matrix.md
@@ -0,0 +1,62 @@
+# Step 2 Adoption Matrix
+
+## Scope
+Repository: `microReticulumTbeam`  
+Submodule source: `external/microReticulum_Firmware`
+
+## What Step 2 Means
+Identify and wire the first low-risk points where this repo should consume existing board-integration logic from `microReticulum_Firmware`, instead of maintaining duplicate local assumptions.
+
+## High-Value Upstream Sources
+- `external/microReticulum_Firmware/Boards.h`
+  - T-Beam Supreme pin map and feature flags.
+  - Includes SD pins (`SD_CS=47`, `SD_CLK=36`, `SD_MISO=37`, `SD_MOSI=35`), PMU I2C pins (`I2C_SDA=42`, `I2C_SCL=41`), LoRa pins.
+- `external/microReticulum_Firmware/Power.h`
+  - AXP2101 setup sequence for T-Beam Supreme (`BOARD_TBEAM_S_V1`), including SD rail (BLDO1), ALDO rails, charging config.
+- `external/microReticulum_Firmware/platformio.ini`
+  - `env:ttgo-t-beam-supreme` build model and dependency pattern.
+
+## Local Targets And First Consumers
+1. `firmware/fieldtest_beacon/src/main.cpp`
+- Why first: this is the integration entry point, not just a smoke test.
+- Step-2 change made: SD CS now comes from `Boards.h` instead of hardcoded `10`.
+
+2. `exercises/04_SD_card/src/main.cpp`
+- Why second: duplicates PMU + SD pin assumptions already present upstream.
+- Planned consume-first item: PMU rail setup pattern from `Power.h`.
+
+3. `exercises/05_SD_Card_Watcher/src/main.cpp`
+- Why third: extends `04` and should share the same PMU/pin source strategy.
+- Planned consume-first item: same board/power source as `04`.
+
+4. `exercises/06_RTC_check/src/main.cpp`
+- Why fourth: depends on PMU + I2C pin assumptions that overlap upstream.
+- Planned consume-first item: board I2C pin source and PMU readiness sequence.
+
+## Current Wiring Done
+- Added submodule:
+  - `external/microReticulum_Firmware`
+- Wired one concrete consumer:
+  - `firmware/fieldtest_beacon/src/main.cpp` now includes `Boards.h` and uses `SD_CS`.
+  - `firmware/fieldtest_beacon/platformio.ini` now includes `external/microReticulum_Firmware` headers and sets `BOARD_MODEL=BOARD_TBEAM_S_V1`.
+- Added local adapter:
+  - `shared/boards/tbeam_supreme_adapter.h`
+  - Exposes board pins and PMU setup based on upstream T-Beam Supreme definitions.
+- Refactored exercises to consume adapter:
+  - `exercises/04_SD_card`
+  - `exercises/05_SD_Card_Watcher`
+  - `exercises/06_RTC_check`
+
+## Validation Status
+- `firmware/fieldtest_beacon` now builds after adding required deps:
+  - `ArduinoJson` 7.x
+  - `MsgPack`
+  - `Crypto` (provides `Ed25519.h` and `Curve25519.h`)
+- `exercises/04_SD_card` builds.
+- `exercises/05_SD_Card_Watcher` builds.
+- `exercises/06_RTC_check` builds.
+
+## Next Step Candidate
+Reduce macro redefinition warnings emitted by `Boards.h` in adapter consumers:
+- Option A: small local board-map header with only required constants copied from upstream board model.
+- Option B: upstream contribution to make board capability macros conditional/override-safe.
diff --git a/exercises/04_SD_card/platformio.ini b/exercises/04_SD_card/platformio.ini
index 91402fe..500e012 100644
--- a/exercises/04_SD_card/platformio.ini
+++ b/exercises/04_SD_card/platformio.ini
@@ -12,16 +12,13 @@ board = esp32-s3-devkitc-1
 monitor_speed = 115200
 lib_deps =
   lewisxhe/XPowersLib@0.3.3
+  Wire
 
 ; SD pins based on T-Beam S3 core pin mapping
 build_flags =
-  -D SD_SCK=36
-  -D SD_MISO=37
-  -D SD_MOSI=35
-  -D SD_CS=47
-  -D IMU_CS=34
-  -D I2C_SDA1=42
-  -D I2C_SCL1=41
+  -I ../../shared/boards
+  -I ../../external/microReticulum_Firmware
+  -D BOARD_MODEL=BOARD_TBEAM_S_V1
   -D ARDUINO_USB_MODE=1
   -D ARDUINO_USB_CDC_ON_BOOT=1
 
diff --git a/exercises/04_SD_card/src/main.cpp b/exercises/04_SD_card/src/main.cpp
index 0ddf800..3b64391 100644
--- a/exercises/04_SD_card/src/main.cpp
+++ b/exercises/04_SD_card/src/main.cpp
@@ -6,30 +6,7 @@
 #include <FS.h>
 #include <SD.h>
 #include <SPI.h>
-#include <Wire.h>
-#include <XPowersLib.h>
-
-#ifndef SD_SCK
-#define SD_SCK 36
-#endif
-#ifndef SD_MISO
-#define SD_MISO 37
-#endif
-#ifndef SD_MOSI
-#define SD_MOSI 35
-#endif
-#ifndef SD_CS
-#define SD_CS 47
-#endif
-#ifndef IMU_CS
-#define IMU_CS 34
-#endif
-#ifndef I2C_SDA1
-#define I2C_SDA1 42
-#endif
-#ifndef I2C_SCL1
-#define I2C_SCL1 41
-#endif
+#include "tbeam_supreme_adapter.h"
 
 static SPIClass sdSpiH(HSPI);
 static SPIClass sdSpiF(FSPI);
@@ -44,32 +21,7 @@ static const char* kNestedTestFile = "/test/testsub1/testsubsub1/Exercise_04_tes
 static const char* kPayload = "This is a test";
 
 static bool initPmuForSdPower() {
-  Wire1.begin(I2C_SDA1, I2C_SCL1);
-
-  if (!g_pmu) {
-    g_pmu = new XPowersAXP2101(Wire1);
-  }
-
-  if (!g_pmu->init()) {
-    Serial.println("PMU: AXP2101 init failed (SD power rail may be off)");
-    return false;
-  }
-
-  // Mirror Meshtastic tbeam-s3-core power setup needed for peripherals.
-  g_pmu->setPowerChannelVoltage(XPOWERS_ALDO4, 3300); // GNSS
-  g_pmu->enablePowerOutput(XPOWERS_ALDO4);
-  g_pmu->setPowerChannelVoltage(XPOWERS_ALDO3, 3300); // LoRa
-  g_pmu->enablePowerOutput(XPOWERS_ALDO3);
-  g_pmu->setPowerChannelVoltage(XPOWERS_ALDO2, 3300); // sensor/rtc path
-  g_pmu->enablePowerOutput(XPOWERS_ALDO2);
-  g_pmu->setPowerChannelVoltage(XPOWERS_ALDO1, 3300); // IMU/OLED path
-  g_pmu->enablePowerOutput(XPOWERS_ALDO1);
-  g_pmu->setPowerChannelVoltage(XPOWERS_BLDO1, 3300); // SD card rail
-  g_pmu->enablePowerOutput(XPOWERS_BLDO1);
-
-  Serial.printf("PMU: AXP2101 ready, BLDO1(SD)=%s\r\n",
-                g_pmu->isPowerChannelEnable(XPOWERS_BLDO1) ? "ON" : "OFF");
-  return g_pmu->isPowerChannelEnable(XPOWERS_BLDO1);
+  return tbeam_supreme::initPmuForPeripherals(g_pmu, &Serial);
 }
 
 static const char* cardTypeToString(uint8_t type) {
@@ -87,16 +39,16 @@ static bool tryMountWithBus(SPIClass& bus, const char* busName, uint32_t hz) {
   delay(10);
 
   // Keep inactive devices deselected on shared bus lines.
-  pinMode(SD_CS, OUTPUT);
-  digitalWrite(SD_CS, HIGH);
-  pinMode(IMU_CS, OUTPUT);
-  digitalWrite(IMU_CS, HIGH);
+  pinMode(tbeam_supreme::sdCs(), OUTPUT);
+  digitalWrite(tbeam_supreme::sdCs(), HIGH);
+  pinMode(tbeam_supreme::imuCs(), OUTPUT);
+  digitalWrite(tbeam_supreme::imuCs(), HIGH);
 
-  bus.begin(SD_SCK, SD_MISO, SD_MOSI, SD_CS);
+  bus.begin(tbeam_supreme::sdSck(), tbeam_supreme::sdMiso(), tbeam_supreme::sdMosi(), tbeam_supreme::sdCs());
   delay(2);
 
   Serial.printf("SD: trying bus=%s freq=%lu Hz\r\n", busName, (unsigned long)hz);
-  if (!SD.begin(SD_CS, bus, hz)) {
+  if (!SD.begin(tbeam_supreme::sdCs(), bus, hz)) {
     Serial.println("SD: mount failed (possible non-FAT format, power, or bus issue)");
     return false;
   }
@@ -231,8 +183,11 @@ void setup() {
   Serial.println("\r\n==================================================");
   Serial.println("Exercise 04: SD card test loop");
   Serial.println("==================================================");
-  Serial.printf("Pins: CS=%d SCK=%d MISO=%d MOSI=%d\r\n", SD_CS, SD_SCK, SD_MISO, SD_MOSI);
-  Serial.printf("PMU I2C: SDA1=%d SCL1=%d\r\n", I2C_SDA1, I2C_SCL1);
+  Serial.printf("Pins: CS=%d SCK=%d MISO=%d MOSI=%d\r\n",
+                tbeam_supreme::sdCs(), tbeam_supreme::sdSck(),
+                tbeam_supreme::sdMiso(), tbeam_supreme::sdMosi());
+  Serial.printf("PMU I2C: SDA1=%d SCL1=%d\r\n",
+                tbeam_supreme::i2cSda(), tbeam_supreme::i2cScl());
   Serial.println("Note: SD must be FAT16/FAT32 for Arduino SD library.\r\n");
 
   initPmuForSdPower();
diff --git a/exercises/05_SD_Card_Watcher/platformio.ini b/exercises/05_SD_Card_Watcher/platformio.ini
index 91402fe..500e012 100644
--- a/exercises/05_SD_Card_Watcher/platformio.ini
+++ b/exercises/05_SD_Card_Watcher/platformio.ini
@@ -12,16 +12,13 @@ board = esp32-s3-devkitc-1
 monitor_speed = 115200
 lib_deps =
   lewisxhe/XPowersLib@0.3.3
+  Wire
 
 ; SD pins based on T-Beam S3 core pin mapping
 build_flags =
-  -D SD_SCK=36
-  -D SD_MISO=37
-  -D SD_MOSI=35
-  -D SD_CS=47
-  -D IMU_CS=34
-  -D I2C_SDA1=42
-  -D I2C_SCL1=41
+  -I ../../shared/boards
+  -I ../../external/microReticulum_Firmware
+  -D BOARD_MODEL=BOARD_TBEAM_S_V1
   -D ARDUINO_USB_MODE=1
   -D ARDUINO_USB_CDC_ON_BOOT=1
 
diff --git a/exercises/05_SD_Card_Watcher/src/main.cpp b/exercises/05_SD_Card_Watcher/src/main.cpp
index fc51cc7..dd778d7 100644
--- a/exercises/05_SD_Card_Watcher/src/main.cpp
+++ b/exercises/05_SD_Card_Watcher/src/main.cpp
@@ -7,30 +7,7 @@
 #include <FS.h>
 #include <SD.h>
 #include <SPI.h>
-#include <Wire.h>
-#include <XPowersLib.h>
-
-#ifndef SD_SCK
-#define SD_SCK 36
-#endif
-#ifndef SD_MISO
-#define SD_MISO 37
-#endif
-#ifndef SD_MOSI
-#define SD_MOSI 35
-#endif
-#ifndef SD_CS
-#define SD_CS 47
-#endif
-#ifndef IMU_CS
-#define IMU_CS 34
-#endif
-#ifndef I2C_SDA1
-#define I2C_SDA1 42
-#endif
-#ifndef I2C_SCL1
-#define I2C_SCL1 41
-#endif
+#include "tbeam_supreme_adapter.h"
 
 static SPIClass sdSpiH(HSPI);
 static SPIClass sdSpiF(FSPI);
@@ -78,32 +55,7 @@ static void logf(const char* fmt, ...) {
 }
 
 static bool initPmuForSdPower() {
-  Wire1.begin(I2C_SDA1, I2C_SCL1);
-
-  if (!g_pmu) {
-    g_pmu = new XPowersAXP2101(Wire1);
-  }
-
-  if (!g_pmu->init()) {
-    logf("PMU: AXP2101 init failed (SD power rail may be off)");
-    return false;
-  }
-
-  // Mirror Meshtastic tbeam-s3-core power setup needed for peripherals.
-  g_pmu->setPowerChannelVoltage(XPOWERS_ALDO4, 3300); // GNSS
-  g_pmu->enablePowerOutput(XPOWERS_ALDO4);
-  g_pmu->setPowerChannelVoltage(XPOWERS_ALDO3, 3300); // LoRa
-  g_pmu->enablePowerOutput(XPOWERS_ALDO3);
-  g_pmu->setPowerChannelVoltage(XPOWERS_ALDO2, 3300); // sensor/rtc path
-  g_pmu->enablePowerOutput(XPOWERS_ALDO2);
-  g_pmu->setPowerChannelVoltage(XPOWERS_ALDO1, 3300); // IMU/OLED path
-  g_pmu->enablePowerOutput(XPOWERS_ALDO1);
-  g_pmu->setPowerChannelVoltage(XPOWERS_BLDO1, 3300); // SD card rail
-  g_pmu->enablePowerOutput(XPOWERS_BLDO1);
-
-  logf("PMU: AXP2101 ready, BLDO1(SD)=%s",
-       g_pmu->isPowerChannelEnable(XPOWERS_BLDO1) ? "ON" : "OFF");
-  return g_pmu->isPowerChannelEnable(XPOWERS_BLDO1);
+  return tbeam_supreme::initPmuForPeripherals(g_pmu, &Serial);
 }
 
 static const char* cardTypeToString(uint8_t type) {
@@ -121,18 +73,18 @@ static bool tryMountWithBus(SPIClass& bus, const char* busName, uint32_t hz, boo
   delay(10);
 
   // Keep inactive devices deselected on shared bus lines.
-  pinMode(SD_CS, OUTPUT);
-  digitalWrite(SD_CS, HIGH);
-  pinMode(IMU_CS, OUTPUT);
-  digitalWrite(IMU_CS, HIGH);
+  pinMode(tbeam_supreme::sdCs(), OUTPUT);
+  digitalWrite(tbeam_supreme::sdCs(), HIGH);
+  pinMode(tbeam_supreme::imuCs(), OUTPUT);
+  digitalWrite(tbeam_supreme::imuCs(), HIGH);
 
-  bus.begin(SD_SCK, SD_MISO, SD_MOSI, SD_CS);
+  bus.begin(tbeam_supreme::sdSck(), tbeam_supreme::sdMiso(), tbeam_supreme::sdMosi(), tbeam_supreme::sdCs());
   delay(2);
 
   if (verbose) {
     logf("SD: trying bus=%s freq=%lu Hz", busName, (unsigned long)hz);
   }
-  if (!SD.begin(SD_CS, bus, hz)) {
+  if (!SD.begin(tbeam_supreme::sdCs(), bus, hz)) {
     if (verbose) {
       logf("SD: mount failed (possible non-FAT format, power, or bus issue)");
     }
@@ -321,8 +273,11 @@ void setup() {
   Serial.println("\r\n==================================================");
   Serial.println("Exercise 05: SD Card Watcher");
   Serial.println("==================================================");
-  Serial.printf("Pins: CS=%d SCK=%d MISO=%d MOSI=%d\r\n", SD_CS, SD_SCK, SD_MISO, SD_MOSI);
-  Serial.printf("PMU I2C: SDA1=%d SCL1=%d\r\n", I2C_SDA1, I2C_SCL1);
+  Serial.printf("Pins: CS=%d SCK=%d MISO=%d MOSI=%d\r\n",
+                tbeam_supreme::sdCs(), tbeam_supreme::sdSck(),
+                tbeam_supreme::sdMiso(), tbeam_supreme::sdMosi());
+  Serial.printf("PMU I2C: SDA1=%d SCL1=%d\r\n",
+                tbeam_supreme::i2cSda(), tbeam_supreme::i2cScl());
   Serial.println("Note: SD must be FAT16/FAT32 for Arduino SD library.\r\n");
 
   initPmuForSdPower();
diff --git a/exercises/06_RTC_check/platformio.ini b/exercises/06_RTC_check/platformio.ini
index 472385a..178384b 100644
--- a/exercises/06_RTC_check/platformio.ini
+++ b/exercises/06_RTC_check/platformio.ini
@@ -14,8 +14,9 @@ lib_deps =
   lewisxhe/XPowersLib@0.3.3
 
 build_flags =
-  -D I2C_SDA1=42
-  -D I2C_SCL1=41
+  -I ../../shared/boards
+  -I ../../external/microReticulum_Firmware
+  -D BOARD_MODEL=BOARD_TBEAM_S_V1
   -D RTC_I2C_ADDR=0x51
   -D ARDUINO_USB_MODE=1
   -D ARDUINO_USB_CDC_ON_BOOT=1
diff --git a/exercises/06_RTC_check/src/main.cpp b/exercises/06_RTC_check/src/main.cpp
index fe5f7d3..3024133 100644
--- a/exercises/06_RTC_check/src/main.cpp
+++ b/exercises/06_RTC_check/src/main.cpp
@@ -4,14 +4,8 @@
 
 #include <Arduino.h>
 #include <Wire.h>
-#include <XPowersLib.h>
+#include "tbeam_supreme_adapter.h"
 
-#ifndef I2C_SDA1
-#define I2C_SDA1 42
-#endif
-#ifndef I2C_SCL1
-#define I2C_SCL1 41
-#endif
 #ifndef RTC_I2C_ADDR
 #define RTC_I2C_ADDR 0x51
 #endif
@@ -50,26 +44,7 @@ static void logf(const char* fmt, ...) {
 }
 
 static bool initPmuForRtc() {
-  Wire1.begin(I2C_SDA1, I2C_SCL1);
-
-  if (!g_pmu) {
-    g_pmu = new XPowersAXP2101(Wire1);
-  }
-
-  if (!g_pmu->init()) {
-    logf("PMU: AXP2101 init failed");
-    return false;
-  }
-
-  // Keep RTC/I2C-related rails on, matching tbeam-s3-core behavior.
-  g_pmu->setPowerChannelVoltage(XPOWERS_ALDO2, 3300);
-  g_pmu->enablePowerOutput(XPOWERS_ALDO2);
-  g_pmu->setPowerChannelVoltage(XPOWERS_ALDO1, 3300);
-  g_pmu->enablePowerOutput(XPOWERS_ALDO1);
-
-  logf("PMU: AXP2101 ready, ALDO2=%s",
-       g_pmu->isPowerChannelEnable(XPOWERS_ALDO2) ? "ON" : "OFF");
-  return true;
+  return tbeam_supreme::initPmuForPeripherals(g_pmu, &Serial);
 }
 
 static bool rtcRead(RtcDateTime& out, bool& lowVoltageFlag) {
@@ -206,7 +181,8 @@ void setup() {
   Serial.println("\r\n==================================================");
   Serial.println("Exercise 06: RTC check (PCF8563)");
   Serial.println("==================================================");
-  Serial.printf("RTC I2C: SDA1=%d SCL1=%d ADDR=0x%02X\r\n", I2C_SDA1, I2C_SCL1, RTC_I2C_ADDR);
+  Serial.printf("RTC I2C: SDA1=%d SCL1=%d ADDR=0x%02X\r\n",
+                tbeam_supreme::i2cSda(), tbeam_supreme::i2cScl(), RTC_I2C_ADDR);
 
   initPmuForRtc();
 
diff --git a/firmware/fieldtest_beacon/platformio.ini b/firmware/fieldtest_beacon/platformio.ini
index 5453277..1716089 100644
--- a/firmware/fieldtest_beacon/platformio.ini
+++ b/firmware/fieldtest_beacon/platformio.ini
@@ -15,8 +15,13 @@ monitor_speed = 115200
 ; Pull in microReticulum from your repo tree
 build_flags =
   -I ../../external/microReticulum/src
+  -I ../../external/microReticulum_Firmware
+  -D BOARD_MODEL=BOARD_TBEAM_S_V1
   -D FIELDTEST_BEACON=1
 
 lib_deps =
+  bblanchon/ArduinoJson@~7.4.2
+  hideakitai/MsgPack@~0.4.2
+  rweather/Crypto@^0.4.0
   ; SD stack usually comes with Arduino core
   ; Add your LoRa radio library here (RadioLib, SX126x-Arduino, etc.)
diff --git a/firmware/fieldtest_beacon/src/main.cpp b/firmware/fieldtest_beacon/src/main.cpp
index ede2bf8..27d38ec 100644
--- a/firmware/fieldtest_beacon/src/main.cpp
+++ b/firmware/fieldtest_beacon/src/main.cpp
@@ -6,6 +6,7 @@
 #include <Arduino.h>
 #include <SPI.h>
 #include <SD.h>
+#include "Boards.h"
 
 // Include microReticulum headers from your external tree
 #include "Identity.h"
@@ -24,8 +25,8 @@ static uint32_t g_iter = 0;
 static uint32_t g_next_tx = 0;
 static File g_log;
 
-// TODO: replace with your board’s SD CS pin if not default
-static const int SD_CS_PIN = 10;
+// Source board pin mapping from microReticulum_Firmware board definitions.
+static const int SD_CS_PIN = SD_CS;
 
 // Simple line logger (append-only)
 static void log_line(const String& line) {
diff --git a/shared/boards/tbeam_supreme_adapter.h b/shared/boards/tbeam_supreme_adapter.h
new file mode 100644
index 0000000..132f025
--- /dev/null
+++ b/shared/boards/tbeam_supreme_adapter.h
@@ -0,0 +1,71 @@
+#pragma once
+
+#include <Arduino.h>
+#include <Wire.h>
+#include <XPowersLib.h>
+#include "Boards.h"
+
+namespace tbeam_supreme {
+
+inline int i2cSda() { return I2C_SDA; }
+inline int i2cScl() { return I2C_SCL; }
+inline int sdSck() { return SD_CLK; }
+inline int sdMiso() { return SD_MISO; }
+inline int sdMosi() { return SD_MOSI; }
+inline int sdCs() { return SD_CS; }
+inline int imuCs() { return IMU_CS; }
+
+inline bool initPmuForPeripherals(XPowersLibInterface*& pmu, Print* out = nullptr) {
+  if (BOARD_MODEL != BOARD_TBEAM_S_V1) {
+    if (out) out->println("PMU adapter: BOARD_MODEL is not T-Beam Supreme");
+    return false;
+  }
+
+  Wire1.begin(i2cSda(), i2cScl());
+
+  if (!pmu) {
+    pmu = new XPowersAXP2101(Wire1);
+  }
+
+  if (!pmu->init()) {
+    if (out) out->println("PMU adapter: AXP2101 init failed");
+    return false;
+  }
+
+  // Match microReticulum_Firmware tbeam supreme rail setup.
+  pmu->setPowerChannelVoltage(XPOWERS_ALDO4, 3300);
+  pmu->enablePowerOutput(XPOWERS_ALDO4);
+  pmu->setPowerChannelVoltage(XPOWERS_ALDO3, 3300);
+  pmu->enablePowerOutput(XPOWERS_ALDO3);
+  pmu->setPowerChannelVoltage(XPOWERS_DCDC3, 3300);
+  pmu->enablePowerOutput(XPOWERS_DCDC3);
+  pmu->setPowerChannelVoltage(XPOWERS_ALDO2, 3300);
+  pmu->enablePowerOutput(XPOWERS_ALDO2);
+  pmu->setPowerChannelVoltage(XPOWERS_ALDO1, 3300);
+  pmu->enablePowerOutput(XPOWERS_ALDO1);
+  pmu->setPowerChannelVoltage(XPOWERS_BLDO1, 3300);
+  pmu->enablePowerOutput(XPOWERS_BLDO1);
+
+  pmu->disablePowerOutput(XPOWERS_DCDC2);
+  pmu->disablePowerOutput(XPOWERS_DCDC5);
+  pmu->disablePowerOutput(XPOWERS_DLDO1);
+  pmu->disablePowerOutput(XPOWERS_DLDO2);
+  pmu->disablePowerOutput(XPOWERS_VBACKUP);
+
+  pmu->setChargeTargetVoltage(XPOWERS_AXP2101_CHG_VOL_4V2);
+  pmu->setChargerConstantCurr(XPOWERS_AXP2101_CHG_CUR_500MA);
+  pmu->disableIRQ(XPOWERS_AXP2101_ALL_IRQ);
+  pmu->clearIrqStatus();
+  pmu->disableTSPinMeasure();
+  pmu->enableVbusVoltageMeasure();
+  pmu->enableBattVoltageMeasure();
+
+  if (out) {
+    out->printf("PMU adapter: AXP2101 ready, BLDO1(SD)=%s\r\n",
+                pmu->isPowerChannelEnable(XPOWERS_BLDO1) ? "ON" : "OFF");
+  }
+
+  return pmu->isPowerChannelEnable(XPOWERS_BLDO1);
+}
+
+} // namespace tbeam_supreme