diff --git a/make/source.mk b/make/source.mk
index dda6cba09..348d8ee92 100644
--- a/make/source.mk
+++ b/make/source.mk
@@ -71,6 +71,7 @@ COMMON_SRC = \
             pg/sdcard.c \
             pg/vcd.c \
             scheduler/scheduler.c \
+            sensors/adcinternal.c \
             sensors/battery.c \
             sensors/current.c \
             sensors/voltage.c \
diff --git a/src/main/build/debug.c b/src/main/build/debug.c
index 204e1f2e4..d32c94f86 100644
--- a/src/main/build/debug.c
+++ b/src/main/build/debug.c
@@ -55,4 +55,5 @@ const char * const debugModeNames[DEBUG_COUNT] = {
     "RANGEFINDER",
     "RANGEFINDER_QUALITY",
     "LIDAR_TF",
+    "CORE_TEMP",
 };
diff --git a/src/main/build/debug.h b/src/main/build/debug.h
index 210ed54f4..072fdcde0 100644
--- a/src/main/build/debug.h
+++ b/src/main/build/debug.h
@@ -73,6 +73,7 @@ typedef enum {
     DEBUG_RANGEFINDER,
     DEBUG_RANGEFINDER_QUALITY,
     DEBUG_LIDAR_TF,
+    DEBUG_CORE_TEMP,
     DEBUG_COUNT
 } debugType_e;
 
diff --git a/src/main/drivers/adc.c b/src/main/drivers/adc.c
index 67c13ebb9..904faa68c 100644
--- a/src/main/drivers/adc.c
+++ b/src/main/drivers/adc.c
@@ -19,11 +19,10 @@
 #include <stdint.h>
 
 #include "platform.h"
+#include "common/utils.h"
 
 #ifdef USE_ADC
 
-#include "common/utils.h"
-
 #include "build/build_config.h"
 #include "build/debug.h"
 
@@ -34,12 +33,18 @@
 
 #include "adc.h"
 
-
 //#define DEBUG_ADC_CHANNELS
 
 adcOperatingConfig_t adcOperatingConfig[ADC_CHANNEL_COUNT];
 volatile uint16_t adcValues[ADC_CHANNEL_COUNT];
 
+#ifdef USE_ADC_INTERNAL
+uint16_t adcTSCAL1;
+uint16_t adcTSCAL2;
+uint16_t adcTSSlopeK;
+uint16_t adcVREFINTCAL;
+#endif
+
 uint8_t adcChannelByTag(ioTag_t ioTag)
 {
     for (uint8_t i = 0; i < ARRAYLEN(adcTagMap); i++) {
@@ -116,4 +121,11 @@ bool adcVerifyPin(ioTag_t tag, ADCDevice device)
 
     return false;
 }
+
+#else
+uint16_t adcGetChannel(uint8_t channel)
+{
+    UNUSED(channel);
+    return 0;
+}
 #endif
diff --git a/src/main/drivers/adc.h b/src/main/drivers/adc.h
index dd7309c43..2a8f88ee6 100644
--- a/src/main/drivers/adc.h
+++ b/src/main/drivers/adc.h
@@ -20,6 +20,7 @@
 #include <stdbool.h>
 
 #include "drivers/io_types.h"
+#include "drivers/time.h"
 
 #ifndef ADC_INSTANCE
 #define ADC_INSTANCE                ADC1
@@ -75,6 +76,18 @@ struct adcConfig_s;
 void adcInit(const struct adcConfig_s *config);
 uint16_t adcGetChannel(uint8_t channel);
 
+#ifdef USE_ADC_INTERNAL
+extern uint16_t adcVREFINTCAL;
+extern uint16_t adcTSCAL1;
+extern uint16_t adcTSCAL2;
+extern uint16_t adcTSSlopeK;
+
+bool adcInternalIsBusy(void);
+void adcInternalStartConversion(void);
+uint16_t adcInternalReadVrefint(void);
+uint16_t adcInternalReadTempsensor(void);
+#endif
+
 #ifndef SITL
 ADCDevice adcDeviceByInstance(ADC_TypeDef *instance);
 #endif
diff --git a/src/main/drivers/adc_stm32f4xx.c b/src/main/drivers/adc_stm32f4xx.c
index 51cf5a9ba..ca4ac4a08 100644
--- a/src/main/drivers/adc_stm32f4xx.c
+++ b/src/main/drivers/adc_stm32f4xx.c
@@ -23,6 +23,8 @@
 
 #ifdef USE_ADC
 
+#include "build/debug.h"
+
 #include "drivers/accgyro/accgyro.h"
 #include "drivers/system.h"
 
@@ -96,11 +98,84 @@ const adcTagMap_t adcTagMap[] = {
 #endif
 };
 
-void adcInit(const adcConfig_t *config)
+#define VREFINT_CAL_ADDR  0x1FFF7A2A
+#define TS_CAL1_ADDR      0x1FFF7A2C
+#define TS_CAL2_ADDR      0x1FFF7A2E
+
+void adcInitDevice(ADC_TypeDef *adcdev, int channelCount)
 {
     ADC_InitTypeDef ADC_InitStructure;
-    DMA_InitTypeDef DMA_InitStructure;
 
+    ADC_StructInit(&ADC_InitStructure);
+
+    ADC_InitStructure.ADC_ContinuousConvMode       = ENABLE;
+    ADC_InitStructure.ADC_Resolution               = ADC_Resolution_12b;
+    ADC_InitStructure.ADC_ExternalTrigConv         = ADC_ExternalTrigConv_T1_CC1;
+    ADC_InitStructure.ADC_ExternalTrigConvEdge     = ADC_ExternalTrigConvEdge_None;
+    ADC_InitStructure.ADC_DataAlign                = ADC_DataAlign_Right;
+    ADC_InitStructure.ADC_NbrOfConversion          = channelCount;
+    ADC_InitStructure.ADC_ScanConvMode             = channelCount > 1 ? ENABLE : DISABLE; // 1=scan more that one channel in group
+
+    ADC_Init(adcdev, &ADC_InitStructure);
+}
+
+#ifdef USE_ADC_INTERNAL
+void adcInitInternalInjected(void)
+{
+    ADC_TempSensorVrefintCmd(ENABLE);
+    ADC_InjectedDiscModeCmd(ADC1, DISABLE);
+    ADC_InjectedSequencerLengthConfig(ADC1, 2);
+    ADC_InjectedChannelConfig(ADC1, ADC_Channel_Vrefint, 1, ADC_SampleTime_480Cycles);
+    ADC_InjectedChannelConfig(ADC1, ADC_Channel_TempSensor, 2, ADC_SampleTime_480Cycles);
+
+    adcVREFINTCAL = *(uint16_t *)VREFINT_CAL_ADDR;
+    adcTSCAL1 = *(uint16_t *)TS_CAL1_ADDR;
+    adcTSCAL2 = *(uint16_t *)TS_CAL2_ADDR;
+    adcTSSlopeK = (110 - 30) * 1000 / (adcTSCAL2 - adcTSCAL1);
+}
+
+// Note on sampling time for temperature sensor and vrefint:
+// Both sources have minimum sample time of 10us.
+// With prescaler = 8:
+// 168MHz : fAPB2 = 84MHz, fADC = 10.5MHz, tcycle = 0.090us, 10us = 105cycle < 144cycle
+// 240MHz : fAPB2 = 120MHz, fADC = 15.0MHz, tcycle = 0.067usk 10us = 150cycle < 480cycle
+//
+// 480cycles@15.0MHz = 32us
+
+static bool adcInternalConversionInProgress = false;
+
+bool adcInternalIsBusy(void)
+{
+    if (adcInternalConversionInProgress) {
+        if (ADC_GetFlagStatus(ADC1, ADC_FLAG_JEOC) != RESET) {
+            adcInternalConversionInProgress = false;
+        }
+    }
+
+    return adcInternalConversionInProgress;
+}
+
+void adcInternalStartConversion(void)
+{
+    ADC_ClearFlag(ADC1, ADC_FLAG_JEOC);
+    ADC_SoftwareStartInjectedConv(ADC1);
+
+    adcInternalConversionInProgress = true;
+}
+
+uint16_t adcInternalReadVrefint(void)
+{
+    return ADC_GetInjectedConversionValue(ADC1, ADC_InjectedChannel_1);
+}
+
+uint16_t adcInternalReadTempsensor(void)
+{
+    return ADC_GetInjectedConversionValue(ADC1, ADC_InjectedChannel_2);
+}
+#endif
+
+void adcInit(const adcConfig_t *config)
+{
     uint8_t i;
     uint8_t configuredAdcChannels = 0;
 
@@ -149,10 +224,47 @@ void adcInit(const adcConfig_t *config)
 
     RCC_ClockCmd(adc.rccADC, ENABLE);
 
+    ADC_CommonInitTypeDef ADC_CommonInitStructure;
+
+    ADC_CommonStructInit(&ADC_CommonInitStructure);
+    ADC_CommonInitStructure.ADC_Mode             = ADC_Mode_Independent;
+    ADC_CommonInitStructure.ADC_Prescaler        = ADC_Prescaler_Div8;
+    ADC_CommonInitStructure.ADC_DMAAccessMode    = ADC_DMAAccessMode_Disabled;
+    ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
+    ADC_CommonInit(&ADC_CommonInitStructure);
+
+    adcInitDevice(adc.ADCx, configuredAdcChannels);
+
+    uint8_t rank = 1;
+    for (i = 0; i < ADC_CHANNEL_COUNT; i++) {
+        if (!adcOperatingConfig[i].enabled) {
+            continue;
+        }
+        ADC_RegularChannelConfig(adc.ADCx, adcOperatingConfig[i].adcChannel, rank++, adcOperatingConfig[i].sampleTime);
+    }
+    ADC_DMARequestAfterLastTransferCmd(adc.ADCx, ENABLE);
+
+    ADC_DMACmd(adc.ADCx, ENABLE);
+    ADC_Cmd(adc.ADCx, ENABLE);
+
+#ifdef USE_ADC_INTERNAL
+    // If device is not ADC1, then initialize ADC1 separately
+    if (device != ADCDEV_1) {
+        RCC_ClockCmd(adcHardware[ADCDEV_1].rccADC, ENABLE);
+        adcInitDevice(ADC1, 2);
+        ADC_Cmd(ADC1, ENABLE);
+    }
+
+    // Initialize for injected conversion
+    adcInitInternalInjected();
+#endif
+
     dmaInit(dmaGetIdentifier(adc.DMAy_Streamx), OWNER_ADC, 0);
 
     DMA_DeInit(adc.DMAy_Streamx);
 
+    DMA_InitTypeDef DMA_InitStructure;
+
     DMA_StructInit(&DMA_InitStructure);
     DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&adc.ADCx->DR;
     DMA_InitStructure.DMA_Channel = adc.channel;
@@ -169,39 +281,6 @@ void adcInit(const adcConfig_t *config)
 
     DMA_Cmd(adc.DMAy_Streamx, ENABLE);
 
-    ADC_CommonInitTypeDef ADC_CommonInitStructure;
-
-    ADC_CommonStructInit(&ADC_CommonInitStructure);
-    ADC_CommonInitStructure.ADC_Mode             = ADC_Mode_Independent;
-    ADC_CommonInitStructure.ADC_Prescaler        = ADC_Prescaler_Div8;
-    ADC_CommonInitStructure.ADC_DMAAccessMode    = ADC_DMAAccessMode_Disabled;
-    ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
-    ADC_CommonInit(&ADC_CommonInitStructure);
-
-    ADC_StructInit(&ADC_InitStructure);
-
-    ADC_InitStructure.ADC_ContinuousConvMode       = ENABLE;
-    ADC_InitStructure.ADC_Resolution               = ADC_Resolution_12b;
-    ADC_InitStructure.ADC_ExternalTrigConv         = ADC_ExternalTrigConv_T1_CC1;
-    ADC_InitStructure.ADC_ExternalTrigConvEdge     = ADC_ExternalTrigConvEdge_None;
-    ADC_InitStructure.ADC_DataAlign                = ADC_DataAlign_Right;
-    ADC_InitStructure.ADC_NbrOfConversion          = configuredAdcChannels;
-    ADC_InitStructure.ADC_ScanConvMode             = configuredAdcChannels > 1 ? ENABLE : DISABLE; // 1=scan more that one channel in group
-
-    ADC_Init(adc.ADCx, &ADC_InitStructure);
-
-    uint8_t rank = 1;
-    for (i = 0; i < ADC_CHANNEL_COUNT; i++) {
-        if (!adcOperatingConfig[i].enabled) {
-            continue;
-        }
-        ADC_RegularChannelConfig(adc.ADCx, adcOperatingConfig[i].adcChannel, rank++, adcOperatingConfig[i].sampleTime);
-    }
-    ADC_DMARequestAfterLastTransferCmd(adc.ADCx, ENABLE);
-
-    ADC_DMACmd(adc.ADCx, ENABLE);
-    ADC_Cmd(adc.ADCx, ENABLE);
-
     ADC_SoftwareStartConv(adc.ADCx);
 }
 #endif
diff --git a/src/main/fc/fc_tasks.c b/src/main/fc/fc_tasks.c
index 2033c556b..bd2fe15b1 100644
--- a/src/main/fc/fc_tasks.c
+++ b/src/main/fc/fc_tasks.c
@@ -71,6 +71,7 @@
 #include "rx/rx.h"
 
 #include "sensors/acceleration.h"
+#include "sensors/adcinternal.h"
 #include "sensors/barometer.h"
 #include "sensors/battery.h"
 #include "sensors/compass.h"
@@ -324,6 +325,9 @@ void fcTasksInit(void)
 #ifdef USE_ESC_SENSOR
     setTaskEnabled(TASK_ESC_SENSOR, feature(FEATURE_ESC_SENSOR));
 #endif
+#ifdef USE_ADC_INTERNAL
+    setTaskEnabled(TASK_ADC_INTERNAL, true);
+#endif
 #ifdef USE_CMS
 #ifdef USE_MSP_DISPLAYPORT
     setTaskEnabled(TASK_CMS, true);
@@ -595,5 +599,14 @@ cfTask_t cfTasks[TASK_COUNT] = {
         .staticPriority = TASK_PRIORITY_IDLE
     },
 #endif
+
+#ifdef USE_ADC_INTERNAL
+    [TASK_ADC_INTERNAL] = {
+        .taskName = "ADCINTERNAL",
+        .taskFunc = adcInternalProcess,
+        .desiredPeriod = TASK_PERIOD_HZ(1),
+        .staticPriority = TASK_PRIORITY_IDLE
+    },
+#endif
 #endif
 };
diff --git a/src/main/interface/cli.c b/src/main/interface/cli.c
index ad3dcd2eb..b3c08652a 100644
--- a/src/main/interface/cli.c
+++ b/src/main/interface/cli.c
@@ -130,6 +130,7 @@ extern uint8_t __config_end;
 #include "scheduler/scheduler.h"
 
 #include "sensors/acceleration.h"
+#include "sensors/adcinternal.h"
 #include "sensors/barometer.h"
 #include "sensors/battery.h"
 #include "sensors/boardalignment.h"
@@ -3011,6 +3012,12 @@ static void cliStatus(char *cmdline)
 
     cliPrintf("CPU Clock=%dMHz", (SystemCoreClock / 1000000));
 
+#ifdef USE_ADC_INTERNAL
+    uint16_t vrefintMv = getVrefMv();
+    uint16_t coretemp = getCoreTemperatureCelsius();
+    cliPrintf(", Vref=%d.%2dV, Core temp=%ddegC", vrefintMv / 1000, (vrefintMv % 1000) / 10, coretemp);
+#endif
+
 #if defined(USE_SENSOR_NAMES)
     const uint32_t detectedSensorsMask = sensorsMask();
     for (uint32_t i = 0; ; i++) {
diff --git a/src/main/scheduler/scheduler.h b/src/main/scheduler/scheduler.h
index 5045a5c55..1f8167691 100644
--- a/src/main/scheduler/scheduler.h
+++ b/src/main/scheduler/scheduler.h
@@ -118,6 +118,10 @@ typedef enum {
     TASK_RCDEVICE,
 #endif
 
+#ifdef USE_ADC_INTERNAL
+    TASK_ADC_INTERNAL,
+#endif
+
     /* Count of real tasks */
     TASK_COUNT,
 
diff --git a/src/main/sensors/adcinternal.c b/src/main/sensors/adcinternal.c
new file mode 100644
index 000000000..a8ed9de90
--- /dev/null
+++ b/src/main/sensors/adcinternal.c
@@ -0,0 +1,114 @@
+/*
+ * This file is part of Cleanflight.
+ *
+ * Cleanflight is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Cleanflight is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "platform.h"
+
+#if defined(USE_ADC) && defined(USE_ADC_INTERNAL)
+
+#include "build/debug.h"
+
+#include "common/utils.h"
+
+#include "drivers/adc.h"
+
+typedef struct movingAverageStateUint16_s {
+    uint32_t sum;
+    uint16_t *values;
+    uint8_t size;
+    uint8_t pos;
+} movingAverageStateUint16_t;
+
+uint16_t updateMovingAverageUint16(movingAverageStateUint16_t *state, uint16_t newValue)
+{
+    state->sum -= state->values[state->pos];
+    state->values[state->pos] = newValue;
+    state->sum += newValue;
+    state->pos = (state->pos + 1) % state->size;
+
+    return state->sum / state->size;
+}
+
+static uint16_t adcVrefintValue;
+static uint16_t adcVrefintValues[8];
+movingAverageStateUint16_t adcVrefintAverageState = { 0, adcVrefintValues, 8, 0 } ;
+
+static uint16_t adcTempsensorValue;
+static uint16_t adcTempsensorValues[8];
+movingAverageStateUint16_t adcTempsensorAverageState = { 0, adcTempsensorValues, 8, 0 } ;
+
+static int16_t coreTemperature;
+
+uint16_t getVrefMv(void)
+{
+#ifdef ADC_VOLTAGE_REFERENCE_MV
+    return ADC_VOLTAGE_REFERENCE_MV;
+#else
+    return 3300 * adcVrefintValue / adcVREFINTCAL;
+#endif
+}
+
+uint16_t getCoreTemperatureCelsius(void)
+{
+    return coreTemperature;
+}
+
+void adcInternalProcess(timeUs_t currentTimeUs)
+{
+    UNUSED(currentTimeUs);
+
+    if (adcInternalIsBusy()) {
+        return;
+    }
+
+    uint16_t vrefintSample = adcInternalReadVrefint();
+    uint16_t tempsensorSample = adcInternalReadTempsensor();
+
+    adcVrefintValue = updateMovingAverageUint16(&adcVrefintAverageState, vrefintSample);
+    adcTempsensorValue = updateMovingAverageUint16(&adcTempsensorAverageState, tempsensorSample);
+
+    int32_t adcTempsensorAdjusted = (int32_t)adcTempsensorValue * 3300 / getVrefMv();
+    coreTemperature = ((adcTempsensorAdjusted - adcTSCAL1) * adcTSSlopeK + 30 * 1000 + 500) / 1000;
+
+    DEBUG_SET(DEBUG_CORE_TEMP, 0, coreTemperature);
+
+    adcInternalStartConversion(); // Start next conversion
+}
+
+void adcInternalInit(void)
+{
+    // Call adcInternalProcess repeatedly to fill moving average array
+    for (int i = 0 ; i < 9 ; i++) {
+        while (adcInternalIsBusy()) {
+            // empty
+        }
+        adcInternalProcess(0);
+    }
+}
+#else
+uint16_t getVrefMv(void)
+{
+#ifdef ADC_VOLTAGE_REFERENCE_MV
+    return ADC_VOLTAGE_REFERENCE_MV;
+#else
+    return 3300;
+#endif
+}
+#endif
diff --git a/src/main/sensors/adcinternal.h b/src/main/sensors/adcinternal.h
new file mode 100644
index 000000000..f0c0e3cc2
--- /dev/null
+++ b/src/main/sensors/adcinternal.h
@@ -0,0 +1,25 @@
+/*
+ * This file is part of Cleanflight.
+ *
+ * Cleanflight is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Cleanflight is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "drivers/time.h"
+
+void adcInternalInit(void);
+void adcInternalProcess(timeUs_t currentTimeUs);
+uint16_t getCoreTemperatureCelsius(void);
+uint16_t getVrefMv(void);
diff --git a/src/main/sensors/current.c b/src/main/sensors/current.c
index 99710f7bd..fbb314a51 100644
--- a/src/main/sensors/current.c
+++ b/src/main/sensors/current.c
@@ -32,6 +32,7 @@
 #include "pg/pg_ids.h"
 #include "config/config_reset.h"
 
+#include "sensors/adcinternal.h"
 #include "sensors/current.h"
 #include "sensors/esc_sensor.h"
 
@@ -77,8 +78,6 @@ void currentMeterReset(currentMeter_t *meter)
 // ADC/Virtual shared
 //
 
-#define ADCVREF 3300   // in mV
-
 #define IBAT_LPF_FREQ  0.4f
 static biquadFilter_t adciBatFilter;
 
@@ -106,7 +105,7 @@ static int32_t currentMeterADCToCentiamps(const uint16_t src)
 
     const currentSensorADCConfig_t *config = currentSensorADCConfig();
 
-    int32_t millivolts = ((uint32_t)src * ADCVREF) / 4096;
+    int32_t millivolts = ((uint32_t)src * getVrefMv()) / 4096;
     // y=x/m+b m is scale in (mV/10A) and b is offset in (mA)
     int32_t centiAmps = (millivolts * 10000 / (int32_t)config->scale + (int32_t)config->offset) / 10;
 
diff --git a/src/main/sensors/initialisation.c b/src/main/sensors/initialisation.c
index 028cd7796..3862c690e 100644
--- a/src/main/sensors/initialisation.c
+++ b/src/main/sensors/initialisation.c
@@ -31,6 +31,7 @@
 #include "fc/runtime_config.h"
 
 #include "sensors/sensors.h"
+#include "sensors/adcinternal.h"
 #include "sensors/acceleration.h"
 #include "sensors/barometer.h"
 #include "sensors/gyro.h"
@@ -65,5 +66,9 @@ bool sensorsAutodetect(void)
     rangefinderInit();
 #endif
 
+#ifdef USE_ADC_INTERNAL
+    adcInternalInit();
+#endif
+
     return gyroDetected;
 }
diff --git a/src/main/sensors/voltage.c b/src/main/sensors/voltage.c
index c482559d8..e26b6a55f 100644
--- a/src/main/sensors/voltage.c
+++ b/src/main/sensors/voltage.c
@@ -33,6 +33,7 @@
 #include "pg/pg_ids.h"
 #include "config/config_reset.h"
 
+#include "sensors/adcinternal.h"
 #include "sensors/voltage.h"
 #include "sensors/esc_sensor.h"
 
@@ -138,7 +139,7 @@ STATIC_UNIT_TESTED uint16_t voltageAdcToVoltage(const uint16_t src, const voltag
 {
     // calculate battery voltage based on ADC reading
     // result is Vbatt in 0.1V steps. 3.3V = ADC Vref, 0xFFF = 12bit adc, 110 = 10:1 voltage divider (10k:1k) * 10 for 0.1V
-    return ((((uint32_t)src * config->vbatscale * 33 + (0xFFF * 5)) / (0xFFF * config->vbatresdivval)) / config->vbatresdivmultiplier);
+    return ((((uint32_t)src * config->vbatscale * getVrefMv() / 100 + (0xFFF * 5)) / (0xFFF * config->vbatresdivval)) / config->vbatresdivmultiplier);
 }
 
 void voltageMeterADCRefresh(void)
diff --git a/src/main/target/OMNIBUSF4/target.h b/src/main/target/OMNIBUSF4/target.h
index ee91dafb7..af10194fa 100644
--- a/src/main/target/OMNIBUSF4/target.h
+++ b/src/main/target/OMNIBUSF4/target.h
@@ -237,6 +237,8 @@
 
 #define USE_ADC
 #define ADC_INSTANCE            ADC2
+//#define ADC_INSTANCE            ADC1
+
 #define CURRENT_METER_ADC_PIN   PC1  // Direct from CRNT pad (part of onboard sensor for Pro)
 #define VBAT_ADC_PIN            PC2  // 11:1 (10K + 1K) divider
 #ifdef DYSF4PRO
diff --git a/src/main/target/common_fc_pre.h b/src/main/target/common_fc_pre.h
index 8a1e02129..7ee3066d6 100644
--- a/src/main/target/common_fc_pre.h
+++ b/src/main/target/common_fc_pre.h
@@ -50,6 +50,8 @@
 #define USE_ESC_SENSOR
 #define I2C3_OVERCLOCK true
 #define USE_GYRO_DATA_ANALYSE
+#define USE_ADC
+#define USE_ADC_INTERNAL
 #endif
 
 #ifdef STM32F722xx