Initial commit: Claude Usage Tracker for Panlee SC01 Plus

Physical desk monitor that displays Claude Code usage limits (5-hour session and 7-day weekly utilization) on an ESP32-S3 touchscreen via USB serial. Firmware: LVGL 9 dashboard with LovyanGFX on SC01 Plus, Anthropic brand colors and custom fonts (Tiempos, Styrene B, DejaVu Sans Mono), Claude spinner animation with rotating status words. Daemon: Pure bash script that reads the Claude Code OAuth token, makes a minimal Haiku API call, extracts usage from rate-limit response headers, and sends JSON to the ESP32 over serial. Uses inotifywait for instant USB plug/unplug detection. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-01 02:37:11 +00:00
commit 2611c70881
23 changed files with 14394 additions and 0 deletions
@@ -0,0 +1,126 @@
+#include <Arduino.h>
+#include <lvgl.h>
+#include <ArduinoJson.h>
+#include "display_cfg.h"
+#include "data.h"
+#include "ui.h"
+
+static LGFX lcd;
+static UsageData usage = {};
+
+// LVGL draw buffers
+#define BUF_LINES 40
+static uint16_t buf1[480 * BUF_LINES];
+static uint16_t buf2[480 * BUF_LINES];
+
+// Serial line buffer
+#define SERIAL_BUF_SIZE 512
+static char serial_buf[SERIAL_BUF_SIZE];
+static int serial_pos = 0;
+
+// LVGL tick callback
+static uint32_t my_tick(void) {
+    return millis();
+}
+
+// LVGL flush callback
+static void my_flush_cb(lv_display_t* disp, const lv_area_t* area, uint8_t* px_map) {
+    uint32_t w = (area->x2 - area->x1 + 1);
+    uint32_t h = (area->y2 - area->y1 + 1);
+    lcd.startWrite();
+    lcd.setAddrWindow(area->x1, area->y1, w, h);
+    lcd.writePixels((uint16_t*)px_map, w * h, true);
+    lcd.endWrite();
+    lv_display_flush_ready(disp);
+}
+
+// LVGL touch callback
+static void my_touch_cb(lv_indev_t* indev, lv_indev_data_t* data) {
+    uint16_t x, y;
+    if (lcd.getTouch(&x, &y)) {
+        data->point.x = x;
+        data->point.y = y;
+        data->state = LV_INDEV_STATE_PRESSED;
+    } else {
+        data->state = LV_INDEV_STATE_RELEASED;
+    }
+}
+
+// Parse a JSON line into UsageData
+static bool parse_json(const char* json, UsageData* out) {
+    JsonDocument doc;
+    DeserializationError err = deserializeJson(doc, json);
+    if (err) {
+        Serial.printf("JSON parse error: %s\n", err.c_str());
+        return false;
+    }
+
+    out->session_pct = doc["s"] | 0.0f;
+    out->session_reset_mins = doc["sr"] | -1;
+    out->weekly_pct = doc["w"] | 0.0f;
+    out->weekly_reset_mins = doc["wr"] | -1;
+    strlcpy(out->status, doc["st"] | "unknown", sizeof(out->status));
+    out->ok = doc["ok"] | false;
+    out->valid = true;
+    return true;
+}
+
+// Read serial data, returns true when a complete line is ready
+static bool read_serial_line() {
+    while (Serial.available()) {
+        char c = Serial.read();
+        if (c == '\n') {
+            serial_buf[serial_pos] = '\0';
+            serial_pos = 0;
+            return true;
+        }
+        if (serial_pos < SERIAL_BUF_SIZE - 1) {
+            serial_buf[serial_pos++] = c;
+        }
+    }
+    return false;
+}
+
+void setup() {
+    Serial.begin(115200);
+    delay(300);
+    Serial.println("{\"ready\":true}");
+
+    // Init display
+    lcd.init();
+    lcd.setRotation(1);
+    lcd.setBrightness(200);
+    lcd.fillScreen(TFT_BLACK);
+
+    // Init LVGL
+    lv_init();
+    lv_tick_set_cb(my_tick);
+
+    lv_display_t* disp = lv_display_create(480, 320);
+    lv_display_set_color_format(disp, LV_COLOR_FORMAT_RGB565);
+    lv_display_set_flush_cb(disp, my_flush_cb);
+    lv_display_set_buffers(disp, buf1, buf2, sizeof(buf1), LV_DISPLAY_RENDER_MODE_PARTIAL);
+
+    lv_indev_t* indev = lv_indev_create();
+    lv_indev_set_type(indev, LV_INDEV_TYPE_POINTER);
+    lv_indev_set_read_cb(indev, my_touch_cb);
+
+    // Build dashboard
+    ui_init();
+
+    Serial.println("Dashboard ready, waiting for data on serial...");
+}
+
+void loop() {
+    lv_timer_handler();
+    ui_tick_anim();
+
+    if (read_serial_line()) {
+        if (parse_json(serial_buf, &usage)) {
+            ui_update(&usage);
+            Serial.println("{\"ack\":true}");
+        }
+    }
+
+    delay(5);
+}