From 6de0aef90b5bb2c73fd0f192eb79bf81e2fb6715 Mon Sep 17 00:00:00 2001
From: Sébastien Dailly <sebastien@dailly.me>
Date: Sun, 20 Jul 2025 21:46:40 +0200
Subject: Refresh the screen when receiving a change from the host

---
 code.py        |  5 ++---
 json_layer.py  | 17 ++++++++++++++++-
 oled.py        | 10 +++++++++-
 serial_conn.py | 17 ++++++++++++-----
 4 files changed, 39 insertions(+), 10 deletions(-)

diff --git a/code.py b/code.py
index a738543..a232644 100644
--- a/code.py
+++ b/code.py
@@ -1,10 +1,9 @@
 import board
-from supervisor import runtime
 import json
-from serial_conn import Client
+from supervisor import runtime
 
 import oled
-from supervisor import runtime
+from serial_conn import Client
 # Do not reload the application when the files are changed
 runtime.autoreload = False
 
diff --git a/json_layer.py b/json_layer.py
index 8d12681..9e98fc3 100644
--- a/json_layer.py
+++ b/json_layer.py
@@ -8,6 +8,7 @@
 #
 
 
+from supervisor import ticks_ms
 from kmk.keys import Key, KC
 from kmk.modules.macros import Delay, Macros, Tap
 
@@ -83,11 +84,15 @@ operators["no_press"]   = no_press
 class Layer(object):
     """ Layer as an object.
         This class gives the property name in addition of the keymap list
+
+        This layer keep a track of the last time the layer was updated. This is
+        used as timer in order to put the device in sleep mode or not.
     """
 
     def __init__(self):
-        self.name = ""
         self.keys = []
+        self._name = ""
+        self.timer_start = ticks_ms()
 
     def load(self, json_data):
         """ Load the json dictionnary into the layer. The dictionnary shall be
@@ -101,6 +106,7 @@ class Layer(object):
 
             The dictionnary must be one of the operators declared above.
         """
+        self.timer_start = ticks_ms()
         for name, keys in json_data.items():
             self.name = name
             self.keys = list(map(key_of_json, keys))
@@ -114,3 +120,12 @@ class Layer(object):
         """ Compare two layer by the name only
         """
         return self.name == other.name
+
+    @property
+    def name(self):
+        return self._name
+
+    @name.setter
+    def name(self, value):
+        self.timer_start = ticks_ms()
+        self._name = value
diff --git a/oled.py b/oled.py
index 4db0436..ab4c917 100644
--- a/oled.py
+++ b/oled.py
@@ -34,6 +34,7 @@ class CustomDisplay(Display):
         layout is updated
     """
     def __init__(self, *args, **kwargs):
+        self.keyboard = None
         super().__init__(*args, **kwargs)
         self._prevLayers = None
 
@@ -47,12 +48,19 @@ class CustomDisplay(Display):
         """
         super().before_matrix_scan(sandbox)
         if self.keyboard.keymap[0].name != self._prevLayers:
-            self.timer_start = ticks_ms()
             self._prevLayers = self.keyboard.keymap[0].name
             self.render(sandbox.active_layers[0])
         return
 
+    @property
+    def timer_start(self):
+        if self.keyboard:
+            return self.keyboard.keymap[0].timer_start
 
+    @timer_start.setter
+    def timer_start(self, value):
+        if self.keyboard:
+            self.keyboard.keymap[0].timer_start = value
 
 def main(keyboard):
 
diff --git a/serial_conn.py b/serial_conn.py
index 0775ba0..a781d64 100644
--- a/serial_conn.py
+++ b/serial_conn.py
@@ -9,6 +9,9 @@ class Client(Module):
         the json command.
     """
 
+    def __init__(self):
+        self.last_name = None
+
     def during_bootup(self, keyboard):
         try:
             # Do not set any timeout, we check before reading a string if there
@@ -23,13 +26,17 @@ class Client(Module):
     def before_hid_send(self, keyboard):
 
         # Serial.data isn't initialized yet.
-        if not data:
-            return
-
-        if not data.connected:
-            keyboard.keymap[0].name = "Disconnected"
+        if not data or not data.connected:
+            current_name = keyboard.keymap[0].name
+            if current_name != "Disconnected":
+                self.last_name = current_name
+                keyboard.keymap[0].name = "Disconnected"
             time.sleep(1)
             return
+        if self.last_name is not None:
+            keyboard.keymap[0].name = self.last_name
+            self.last_name = None
+
 
         # Nothing to parse.
         if data.in_waiting <= 0:
-- 
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