diff --git a/_device_main.py b/_device_main.py
index 941b94b..c894975 100644
--- a/_device_main.py
+++ b/_device_main.py
@@ -56,6 +56,11 @@ def read_pi_coeff(values, key, params, param_key):
 def shorten(i):
     return "{:.2f}".format(round(i, 2))
 
+def shorten4(i):
+    # Higher-precision readout (0.0001) for temperature/current — needed to see
+    # small fluctuations while tuning the PI controller for temperature stability.
+    return "{:.4f}".format(round(i, 4))
+
 
 def set_initial_params():
     params = {}
@@ -447,15 +452,15 @@ if __name__ == "__main__":
     
             update_data_lists()
     
-            window['-TOUT_1-'].update(gui.READ_TEMPERATURE_TEXT+' 1: '+shorten(data['Temp_1'])+' C')
-            window['-TOUT_2-'].update(gui.READ_TEMPERATURE_TEXT+' 2: '+shorten(data['Temp_2'])+' C')
-            window['-IOUT_1-'].update(gui.READ_CURRENT_TEXT+' 1: '+shorten(data['I1'])+' мА')
-            window['-IOUT_2-'].update(gui.READ_CURRENT_TEXT+' 2: '+shorten(data['I2'])+' мА')
+            window['-TOUT_1-'].update(gui.READ_TEMPERATURE_TEXT+' 1: '+shorten4(data['Temp_1'])+' C')
+            window['-TOUT_2-'].update(gui.READ_TEMPERATURE_TEXT+' 2: '+shorten4(data['Temp_2'])+' C')
+            window['-IOUT_1-'].update(gui.READ_CURRENT_TEXT+' 1: '+shorten4(data['I1'])+' мА')
+            window['-IOUT_2-'].update(gui.READ_CURRENT_TEXT+' 2: '+shorten4(data['I2'])+' мА')
             window['-DateTime-'].update(data['datetime'].strftime('%d-%m-%Y %H:%M:%S:%f')[:-3])
-            window['-TTerm1-'].update('T терм 1: '+shorten(data['Temp_Ext_1'])+' C')
-            window['-TTerm2-'].update('T терм 2: '+shorten(data['Temp_Ext_2'])+' C')
-            window['-I1_PANEL-'].update('I1: '+shorten(data['I1'])+' мА')
-            window['-I2_PANEL-'].update('I2: '+shorten(data['I2'])+' мА')
+            window['-TTerm1-'].update('T терм 1: '+shorten4(data['Temp_Ext_1'])+' C')
+            window['-TTerm2-'].update('T терм 2: '+shorten4(data['Temp_Ext_2'])+' C')
+            window['-I1_PANEL-'].update('I1: '+shorten4(data['I1'])+' мА')
+            window['-I2_PANEL-'].update('I2: '+shorten4(data['I2'])+' мА')
             window['-3V3-'].update('3V3: '+shorten(data['MON_3V3'])+' В')
             window['-5V1-'].update('5V1: '+shorten(data['MON_5V1'])+' В')
             window['-5V2-'].update('5V2: '+shorten(data['MON_5V2'])+' В')
diff --git a/gui.py b/gui.py
index e9239b1..93b4bc2 100644
--- a/gui.py
+++ b/gui.py
@@ -58,7 +58,7 @@ GRAPH_I_MAX = 1.0 # mA
 READ_TEMPERATURE_TEXT = 'Температура лазера'
 READ_CURRENT_TEXT = 'Ток фотодиода'
 
-VOLTAGE_TEXT_WIDTH = 15
+VOLTAGE_TEXT_WIDTH = 18
 H_SEPARATOR_PAD = (1, 20)
 OUTPUT_TEXT_PAD = (5, (20, 5))
 WINDOW_MARGIN = (60, 90)