diff --git a/.gitmodules b/.gitmodules
index caa62d3..6369a12 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,7 @@
 [submodule "firmware/ChibiOS"]
 	path = firmware/ChibiOS
-	url = https://github.com/ChibiOS/ChibiOS
+	url = https://github.com/rusefi/ChibiOS
+	branch = master.wideband
 [submodule "firmware/cmsis-svd"]
 	path = firmware/cmsis-svd
 	url = https://github.com/posborne/cmsis-svd
diff --git a/firmware/ChibiOS b/firmware/ChibiOS
index d659db7..6e4b068 160000
--- a/firmware/ChibiOS
+++ b/firmware/ChibiOS
@@ -1 +1 @@
-Subproject commit d659db7440a251608405f40efd73658a6e2abc8a
+Subproject commit 6e4b068f71287f7d67725d00e5d3a5d53cb4ac7b
diff --git a/firmware/boards/f1_dave/board.c b/firmware/boards/f1_dave/board.c
index ac929a4..26f2829 100644
--- a/firmware/boards/f1_dave/board.c
+++ b/firmware/boards/f1_dave/board.c
@@ -15,6 +15,7 @@
 */
 
 #include "hal.h"
+#include "io_pins.h"
 
 /**
  * @brief   PAL setup.
@@ -46,4 +47,5 @@ void __early_init(void) {
  * Board-specific initialization code.
  */
 void boardInit(void) {
+    palSetPadMode(HEATER_PORT, HEATER_PIN, PAL_MODE_OUTPUT_PUSHPULL );
 }
diff --git a/firmware/boards/f1_dave/io/io_pins.h b/firmware/boards/f1_dave/io/io_pins.h
index 7a64284..e0b8962 100644
--- a/firmware/boards/f1_dave/io/io_pins.h
+++ b/firmware/boards/f1_dave/io/io_pins.h
@@ -9,10 +9,15 @@
 #define NERNST_ESR_DRIVER_PORT GPIOB
 #define NERNST_ESR_DRIVER_PIN 12
 
-// PC13
-#define HEATER_PWM_DEVICE PWMD1
+// 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
 
+#define HEATER_PORT GPIOB
+#define HEATER_PIN 6
+
 // PA1 TIM2_CH2
 #define PUMP_DAC_PWM_DEVICE PWMD2
 #define PUMP_DAC_PWM_CHANNEL 1
diff --git a/firmware/boards/f1_dave/mcuconf.h b/firmware/boards/f1_dave/mcuconf.h
index 7cbf371..6512bfa 100644
--- a/firmware/boards/f1_dave/mcuconf.h
+++ b/firmware/boards/f1_dave/mcuconf.h
@@ -134,10 +134,10 @@
  * PWM driver system settings.
  */
 #define STM32_PWM_USE_ADVANCED              FALSE
-#define STM32_PWM_USE_TIM1                  TRUE
+#define STM32_PWM_USE_TIM1                  FALSE
 #define STM32_PWM_USE_TIM2                  TRUE
 #define STM32_PWM_USE_TIM3                  FALSE
-#define STM32_PWM_USE_TIM4                  FALSE
+#define STM32_PWM_USE_TIM4                  TRUE
 #define STM32_PWM_USE_TIM5                  FALSE
 #define STM32_PWM_USE_TIM8                  FALSE
 #define STM32_PWM_TIM1_IRQ_PRIORITY         7