esp-now mode, untested

.github/workflows/main.yml

@@ -8,25 +8,28 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+
       - uses: actions/cache@v3
         with:
           path: |
             ~/.cache/pip
             ~/.platformio/.cache
           key: ${{ runner.os }}-pio
+
       - uses: actions/setup-python@v4
         with:
           python-version: '3.9'
+
       - name: Install PlatformIO Core
         run: pip install --upgrade platformio
 
       - name: Build PlatformIO Project
         run: pio run
 
-      - name: Rename bin file 
+      - name: Rename Bin File 
         run: mv .pio/build/m5cardputer/firmware.bin LoRaChat.bin    
 
-      - name: Upload a Build Artifact
+      - name: Upload Build Artifact
         uses: actions/upload-artifact@v4.3.1
         with:
           name: CardputerLoRaChat
@@ -40,9 +43,8 @@ jobs:
     if: github.ref_type == 'tag'
 
     steps:
-    - uses: actions/download-artifact@v4
-      with:
-        merge-multiple: true
+    - name: Download Build Artifact
+      uses: actions/download-artifact@v4
 
     - name: Release ${{ github.ref_name }}
       uses: softprops/action-gh-release@v1

common.h

@@ -0,0 +1,52 @@
+#include <Arduino.h>
+
+enum RedrawFlags
+{
+  MainWindow = 0b001,
+  SystemBar = 0b010,
+  TabBar = 0b100,
+  None = 0b000
+};
+
+// TODO: refine message format
+struct Message
+{
+  uint8_t nonce : 6;
+  uint8_t channel : 2; // 4 channels, 0b01,0b10,0b11 channels, 0b11 reserved for pings
+  String username;     // use MAC or something tied to device?
+  int rssi;
+  String text;
+};
+
+// track presence of other users
+struct Presence
+{
+  String username;
+  int rssi;
+  unsigned long lastSeenMillis;
+};
+std::vector<Presence> presence;
+
+struct ChatTab
+{
+  unsigned char channel;
+  // TODO: access in thread-safe way
+  std::vector<Message> messages;
+  String messageBuffer;
+  int viewIndex;
+};
+
+enum Settings
+{
+  Username = 0,
+  Brightness = 1,
+  PingMode = 2,
+  RepeatMode = 3,
+  EspNowMode = 4,
+  WriteConfig = 5,
+  LoRaSettings = 6
+};
+
+const int SettingsCount = 7;
+const String SettingsNames[SettingsCount] = {"Username", "Brightness", "Ping Mode", "Repeat Mode", "ESP-NOW Mode", "App Config", "LoRa Config"};
+const String SettingsFilename = "/LoRaChat.conf";