diff --git a/ArduSub/GCS_Mavlink.cpp b/ArduSub/GCS_Mavlink.cpp
index 52989b4ac8ed8..c673786b9a143 100644
--- a/ArduSub/GCS_Mavlink.cpp
+++ b/ArduSub/GCS_Mavlink.cpp
@@ -107,7 +107,8 @@ void GCS_MAVLINK_Sub::send_scaled_pressure3()
         AP_HAL::millis(),
         0,
         0,
-        sub.celsius.temperature() * 100);
+        sub.celsius.temperature() * 100,
+        0); // TODO: use differential pressure temperature
 }
 
 bool GCS_MAVLINK_Sub::send_info()
diff --git a/libraries/AP_Generator/AP_Generator_RichenPower.cpp b/libraries/AP_Generator/AP_Generator_RichenPower.cpp
index fd9a1b248f935..234d0464bff60 100644
--- a/libraries/AP_Generator/AP_Generator_RichenPower.cpp
+++ b/libraries/AP_Generator/AP_Generator_RichenPower.cpp
@@ -374,7 +374,9 @@ void AP_Generator_RichenPower::send_generator_status(const GCS_MAVLINK &channel)
         last_reading.output_voltage, // bus_voltage; Voltage of the bus seen at the generator
         INT16_MAX, // rectifier_temperature
         std::numeric_limits<double>::quiet_NaN(), // bat_current_setpoint; The target battery current
-        INT16_MAX // generator temperature
+        INT16_MAX, // generator temperature
+        UINT32_MAX, // seconds this generator has run since it was rebooted
+        INT32_MAX // seconds until this generator requires maintenance
         );
 }
 
diff --git a/libraries/GCS_MAVLink/GCS.h b/libraries/GCS_MAVLink/GCS.h
index abf89571ae3af..e0bcb6d106582 100644
--- a/libraries/GCS_MAVLink/GCS.h
+++ b/libraries/GCS_MAVLink/GCS.h
@@ -236,7 +236,7 @@ class GCS_MAVLINK
     void send_rc_channels_raw() const;
     void send_raw_imu();
 
-    void send_scaled_pressure_instance(uint8_t instance, void (*send_fn)(mavlink_channel_t chan, uint32_t time_boot_ms, float press_abs, float press_diff, int16_t temperature));
+    void send_scaled_pressure_instance(uint8_t instance, void (*send_fn)(mavlink_channel_t chan, uint32_t time_boot_ms, float press_abs, float press_diff, int16_t temperature, int16_t temperature_press_diff));
     void send_scaled_pressure();
     void send_scaled_pressure2();
     virtual void send_scaled_pressure3(); // allow sub to override this
diff --git a/libraries/GCS_MAVLink/GCS_Common.cpp b/libraries/GCS_MAVLink/GCS_Common.cpp
index 6cd06d6170168..7205017b1c21c 100644
--- a/libraries/GCS_MAVLink/GCS_Common.cpp
+++ b/libraries/GCS_MAVLink/GCS_Common.cpp
@@ -1716,14 +1716,15 @@ void GCS_MAVLINK::send_scaled_imu(uint8_t instance, void (*send_fn)(mavlink_chan
 // send data for barometer and airspeed sensors instances.  In the
 // case that we run out of instances of one before the other we send
 // the relevant fields as 0.
-void GCS_MAVLINK::send_scaled_pressure_instance(uint8_t instance, void (*send_fn)(mavlink_channel_t chan, uint32_t time_boot_ms, float press_abs, float press_diff, int16_t temperature))
+void GCS_MAVLINK::send_scaled_pressure_instance(uint8_t instance, void (*send_fn)(mavlink_channel_t chan, uint32_t time_boot_ms, float press_abs, float press_diff, int16_t temperature, int16_t temperature_press_diff))
 {
     const AP_Baro &barometer = AP::baro();
 
     bool have_data = false;
 
     float press_abs = 0.0f;
-    float temperature = 0.0f;
+    float temperature = 0.0f; // Absolute pressure temperature
+    float temperature_press_diff = 0.0f; // TODO: Differential pressure temperature
     if (instance < barometer.num_instances()) {
         press_abs = barometer.get_pressure(instance) * 0.01f;
         temperature = barometer.get_temperature(instance)*100;
@@ -1747,7 +1748,8 @@ void GCS_MAVLINK::send_scaled_pressure_instance(uint8_t instance, void (*send_fn
         AP_HAL::millis(),
         press_abs, // hectopascal
         press_diff, // hectopascal
-        temperature); // 0.01 degrees C
+        temperature, // 0.01 degrees C
+        temperature_press_diff); // 0.01 degrees C
 }
 
 void GCS_MAVLINK::send_scaled_pressure()
diff --git a/modules/mavlink b/modules/mavlink
index 5bb3107fa6b52..fe0d6e4b47c2d 160000
--- a/modules/mavlink
+++ b/modules/mavlink
@@ -1 +1 @@
-Subproject commit 5bb3107fa6b52651fb5177041e116ae1eb2810ed
+Subproject commit fe0d6e4b47c2d3d31680b233c7e9cdd37f4b4eaf