diff --git a/firmware/boards/f0_module/wideband_board_config.h b/firmware/boards/f0_module/wideband_board_config.h
index 15454b8..6a7e71c 100644
--- a/firmware/boards/f0_module/wideband_board_config.h
+++ b/firmware/boards/f0_module/wideband_board_config.h
@@ -11,4 +11,9 @@
 // *******************************
 #define NERNST_INPUT_GAIN (1 / 2.7f)
 
-#define AFR_CHANNELS 1
\ No newline at end of file
+#define AFR_CHANNELS 1
+
+// *******************************
+//    Nernst voltage & ESR sense
+// *******************************
+#define VM_RESISTOR_VALUE (10)
diff --git a/firmware/boards/f1_dave/wideband_board_config.h b/firmware/boards/f1_dave/wideband_board_config.h
index 3cdba09..415f9bc 100644
--- a/firmware/boards/f1_dave/wideband_board_config.h
+++ b/firmware/boards/f1_dave/wideband_board_config.h
@@ -18,3 +18,8 @@
 #define BATTERY_INPUT_DIVIDER (10.0 / (10.0 + 39.0))
 
 #define AFR_CHANNELS 1
+
+// *******************************
+//    Nernst voltage & ESR sense
+// *******************************
+#define VM_RESISTOR_VALUE (10)
diff --git a/firmware/boards/f1_rev2/board.h b/firmware/boards/f1_rev2/board.h
index d3bce29..fcedb1b 100644
--- a/firmware/boards/f1_rev2/board.h
+++ b/firmware/boards/f1_rev2/board.h
@@ -99,20 +99,20 @@
  * Port B setup.
  * PB0  - Vbatt_sense               (analog in).
  * PB1  - Heater_sense              (analog in).
- * PB2  - Nernsr_4.9_bias           (digital input, no pull) - keep high-Z after power on
+ * PB2  - Nernsr_4.9_bias           (digital output, 2 Mhz)
  * PB3  - SWO                       (digital input)
  * PB4..PB5 - DISP1..DISP2 - unused
  * PB6  - heater_pwm                (output pushpull, alternate, 2 MHz).
  * PB7..PB9 - DISP4..DISP6 - unused
  * PB10 - Nernsr_ADV_esr_drive      (digital input, no pull) - keep high-Z after power on
- * PB11 - Nernsr_4.9_esr_drive      (digital input, no pull) - keep high-Z after power on
+ * PB11 - Nernsr_4.9_esr_drive      (output pushpull, 50 Mhz)
  * PB12 - Nernsr_4.2_esr_drive      (digital input, no pull) - keep high-Z after power on
  * PB13 - Blue LED                  (output pushpull, 2 MHz)
- * PB14 - PWMout2                   (output pushpull, alternate, 50 Mhz).
- * PB15 - PWMout1                   (output pushpull, alternate, 50 Mhz).
+ * PB14 - PWMout2                   (output pushpull, alternate, 2 Mhz).
+ * PB15 - PWMout1                   (output pushpull, alternate, 2 Mhz).
  */
-#define VAL_GPIOBCRL            0x8A888400      /*  PB7...PB0 */
-#define VAL_GPIOBCRH            0xBB244488      /* PB15...PB8 */
+#define VAL_GPIOBCRL            0x8A888200      /*  PB7...PB0 */
+#define VAL_GPIOBCRH            0xAA243488      /* PB15...PB8 */
 #define VAL_GPIOBODR            0x0000FFFF
 
 /*
diff --git a/firmware/boards/f1_rev2/io/io_pins.h b/firmware/boards/f1_rev2/io/io_pins.h
index f151062..ad6afee 100644
--- a/firmware/boards/f1_rev2/io/io_pins.h
+++ b/firmware/boards/f1_rev2/io/io_pins.h
@@ -6,11 +6,18 @@
 #define LED_GREEN_PORT GPIOA
 #define LED_GREEN_PIN 8
 
-#define NERNST_ESR_DRIVER_PORT GPIOB
-#define NERNST_ESR_DRIVER_PIN 12
+// LSU 4.2 - 6.8K
+#define NERNST_42_ESR_DRIVER_PORT   GPIOB
+#define NERNST_42_ESR_DRIVER_PIN    12
+
+// LSU 4.9 - 22K
+#define NERNST_ESR_DRIVER_PORT      GPIOB
+#define NERNST_ESR_DRIVER_PIN       11
+
+// LSU ADV - 47K
+#define NERNST_ADV_ESR_DRIVER_PORT  GPIOB
+#define NERNST_ADV_ESR_DRIVER_PIN   10
 
-// PC13 on rev 0.1
-// exploring jumper wire from PB6 DISP3 to HEATER
 // PB6 TIM4_CH1
 #define HEATER_PWM_DEVICE PWMD4
 #define HEATER_PWM_CHANNEL 0
@@ -19,8 +26,8 @@
 #define PUMP_DAC_PWM_DEVICE PWMD2
 #define PUMP_DAC_PWM_CHANNEL 1
 
-#define ID_SEL1_PORT GPIOB
-#define ID_SEL1_PIN 0
+#define ID_SEL1_PORT                GPIOC
+#define ID_SEL1_PIN                 13
 
-#define ID_SEL2_PORT GPIOB
-#define ID_SEL2_PIN 1
\ No newline at end of file
+#define ID_SEL2_PORT                GPIOC
+#define ID_SEL2_PIN                 14
diff --git a/firmware/boards/f1_rev2/wideband_board_config.h b/firmware/boards/f1_rev2/wideband_board_config.h
index a6815f6..de916dd 100644
--- a/firmware/boards/f1_rev2/wideband_board_config.h
+++ b/firmware/boards/f1_rev2/wideband_board_config.h
@@ -30,3 +30,8 @@
 #define VM_INPUT_DIVIDER (10.0 / (10.0 + 100.0))
 
 #define AFR_CHANNELS 1
+
+// *******************************
+//    Nernst voltage & ESR sense
+// *******************************
+#define VM_RESISTOR_VALUE (0)
diff --git a/firmware/wideband_config.h b/firmware/wideband_config.h
index c94d5b7..3040a81 100644
--- a/firmware/wideband_config.h
+++ b/firmware/wideband_config.h
@@ -9,7 +9,6 @@
 
 // Nernst AC injection resistor value
 #define ESR_SUPPLY_R (22000)
-#define VM_RESISTOR_VALUE (10)
 
 // Heater low pass filter
 #define ESR_SENSE_ALPHA (0.002f)