diff --git a/selfdrive/ui/paint.cc b/selfdrive/ui/paint.cc
index 3707caeef8277b..e3e7d3fd664a8d 100644
--- a/selfdrive/ui/paint.cc
+++ b/selfdrive/ui/paint.cc
@@ -847,7 +847,6 @@ static void bb_ui_draw_measures_left(UIState *s, int bb_x, int bb_y, int bb_w )
   */
 
    //add battery temperature
-  /*
   if (true) {
     char val_str[16];
     char uom_str[6];
@@ -858,7 +857,7 @@ static void bb_ui_draw_measures_left(UIState *s, int bb_x, int bb_y, int bb_w )
       val_color = nvgRGBA(255, 188, 3, 200);
     }
 
-    snprintf(val_str, sizeof(val_str), "%2.0f°C", s->scene.pa0);
+    snprintf(val_str, sizeof(val_str), "%2d°C", s->scene.pa0);
     snprintf(uom_str, sizeof(uom_str), "");
     bb_h +=bb_ui_draw_measure(s,  val_str, uom_str, "BAT TEMP",
         bb_rx, bb_ry, bb_uom_dx,
@@ -866,7 +865,6 @@ static void bb_ui_draw_measures_left(UIState *s, int bb_x, int bb_y, int bb_w )
         value_fontSize, label_fontSize, uom_fontSize );
     bb_ry = bb_y + bb_h;
   }
-  */
 
   //add grey panda GPS accuracy
   /*if (true) {
@@ -913,8 +911,9 @@ static void bb_ui_draw_measures_left(UIState *s, int bb_x, int bb_y, int bb_w )
       val_color, lab_color, uom_color,
       value_fontSize, label_fontSize, uom_fontSize );
     bb_ry = bb_y + bb_h;
+
   }
-  
+  */
 
   //finally draw the frame
   bb_h += 20;
@@ -923,7 +922,6 @@ static void bb_ui_draw_measures_left(UIState *s, int bb_x, int bb_y, int bb_w )
   nvgStrokeColor(s->vg, nvgRGBA(255,255,255,80));
   nvgStrokeWidth(s->vg, 6);
   nvgStroke(s->vg);
-  */
 }
 
 
diff --git a/selfdrive/ui/ui.cc b/selfdrive/ui/ui.cc
index 086f3b46145db9..f91ea363932b14 100644
--- a/selfdrive/ui/ui.cc
+++ b/selfdrive/ui/ui.cc
@@ -112,7 +112,6 @@ static void ui_init(UIState *s) {
   s->uilayout_sock = SubSocket::create(s->ctx, "uiLayoutState");
   s->livecalibration_sock = SubSocket::create(s->ctx, "liveCalibration");
   s->radarstate_sock = SubSocket::create(s->ctx, "radarState");
-  //s->thermal_sock = SubSocket::create(s->ctx, "thermal");
   s->carstate_sock = SubSocket::create(s->ctx, "carState");
 
   assert(s->model_sock != NULL);
@@ -120,7 +119,6 @@ static void ui_init(UIState *s) {
   assert(s->uilayout_sock != NULL);
   assert(s->livecalibration_sock != NULL);
   assert(s->radarstate_sock != NULL);
-  //assert(s->thermal_sock != NULL);
   assert(s->carstate_sock != NULL);
 
   s->poller = Poller::create({
@@ -129,21 +127,9 @@ static void ui_init(UIState *s) {
                               s->uilayout_sock,
                               s->livecalibration_sock,
                               s->radarstate_sock,
-	                            s->carstate_sock
+	                      s->carstate_sock
                              });
 
-  /*
-  s->poller = Poller::create({
-                              s->model_sock,
-                              s->controlsstate_sock,
-                              s->uilayout_sock,
-                              s->livecalibration_sock,
-                              s->radarstate_sock,
-                              s->thermal_sock,
-	                            s->carstate_sock
-                             });
-  */
-
 
 #ifdef SHOW_SPEEDLIMIT
   s->map_data_sock = SubSocket::create(s->ctx, "liveMapData");
@@ -444,13 +430,6 @@ void handle_message(UIState *s, Message * msg) {
     s->scene.speedlimitahead_valid = datad.speedLimitAheadValid;
     s->scene.speedlimitaheaddistance = datad.speedLimitAheadDistance;
     s->scene.speedlimit_valid = datad.speedLimitValid;
-  // getting thermal related data for dev ui
-  //} else if (eventd.which == cereal_Event_thermal) {
-  //  struct cereal_ThermalData datad;
-  //  cereal_read_ThermalData(&datad, eventd.thermal);
-
-  //  s->scene.pa0 = datad.pa0;
-  //  s->scene.freeSpace = datad.freeSpace;
   } else if (eventd.which == cereal_Event_carState) {
     struct cereal_CarState datad;
     cereal_read_CarState(&datad, eventd.carState);
@@ -863,6 +842,8 @@ int main(int argc, char* argv[]) {
 
   set_volume(MIN_VOLUME);
   s->volume_timeout = 5 * UI_FREQ;
+  // dev ui, update every 5 seconds
+  s->bat_temp_timeout = 5 * UI_FREQ;
   int draws = 0;
   while (!do_exit) {
     bool should_swap = false;
@@ -976,6 +957,22 @@ int main(int argc, char* argv[]) {
       s->controls_seen = false;
     }
 
+    // dev ui, update battery/temp values every 5 secs
+    if (s->awake && s->vision_connected) {
+      if (s->bat_temp_timeout > 0) {
+        s->bat_temp_timeout--;
+      } else {
+        // update temp
+        int temp = open("/sys/devices/virtual/thermal/thermal_zone25/temp", O_RDONLY);
+        if (temp >= 0) {
+          char temp_buf[2];
+          read(temp, temp_buf, 2);
+          s->scene.pa0 = atoi(temp_buf);
+        }
+        s->bat_temp_timeout = 5 * UI_FREQ;
+      }
+    }
+
     read_param_bool_timeout(&s->is_metric, "IsMetric", &s->is_metric_timeout);
     read_param_bool_timeout(&s->longitudinal_control, "LongitudinalControl", &s->longitudinal_control_timeout);
     read_param_bool_timeout(&s->limit_set_speed, "LimitSetSpeed", &s->limit_set_speed_timeout);
diff --git a/selfdrive/ui/ui.hpp b/selfdrive/ui/ui.hpp
index 956b2040b638db..b1bdb6cbee022f 100644
--- a/selfdrive/ui/ui.hpp
+++ b/selfdrive/ui/ui.hpp
@@ -139,7 +139,7 @@ typedef struct UIScene {
 
   // dev ui
   float angleSteersDes;
-  float pa0;
+  int pa0;
   float freeSpace;
 
 } UIScene;
@@ -234,6 +234,8 @@ typedef struct UIState {
   int is_metric_timeout;
   int longitudinal_control_timeout;
   int limit_set_speed_timeout;
+  // for dev ui
+  int bat_temp_timeout;
 
   bool controls_seen;