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>
This commit is contained in:
Hermann Björgvin Haraldsson
2026-04-01 02:37:11 +00:00
co-authored by Claude Opus 4.6
commit 2611c70881
23 changed files with 14394 additions and 0 deletions
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[env:sc01plus]
platform = espressif32
board = esp32-s3-devkitc-1
framework = arduino
upload_speed = 921600
monitor_speed = 115200
build_flags =
-DARDUINO_USB_CDC_ON_BOOT=1
-DBOARD_HAS_PSRAM
; LVGL config via build flags
-DLV_CONF_SKIP
-DLV_COLOR_DEPTH=16
-DLV_USE_LOG=0
-DLV_FONT_MONTSERRAT_12=1
-DLV_FONT_MONTSERRAT_14=1
-DLV_FONT_MONTSERRAT_16=1
-DLV_FONT_MONTSERRAT_20=1
-DLV_FONT_MONTSERRAT_24=1
-DLV_FONT_MONTSERRAT_28=1
-DLV_USE_BAR=1
-DLV_USE_LABEL=1
-DLV_USE_ARC=1
-DLV_USE_BTN=1
-DLV_USE_LINE=1
-DLV_USE_OBJ=1
-DLV_USE_IMG=1
-DLV_USE_IMAGE=1
-DLV_USE_ANIMIMG=0
-DLV_TICK_CUSTOM=1
lib_deps =
lovyan03/LovyanGFX@^1.1.16
lvgl/lvgl@^9.2.0
bblanchon/ArduinoJson@^7.0.0
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#pragma once
#include <Arduino.h>
struct UsageData {
float session_pct; // 5-hour window utilization (0-100)
int session_reset_mins; // minutes until session resets
float weekly_pct; // 7-day window utilization (0-100)
int weekly_reset_mins; // minutes until weekly resets
char status[16]; // "allowed" or "limited"
bool ok; // data parse succeeded
bool valid; // false until first successful parse
};
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#pragma once
#define LGFX_USE_V1
#include <LovyanGFX.hpp>
class LGFX : public lgfx::LGFX_Device {
// 8-bit parallel bus for ST7796 display
lgfx::Bus_Parallel8 _bus_instance;
// ST7796 display panel
lgfx::Panel_ST7796 _panel_instance;
// PWM backlight
lgfx::Light_PWM _light_instance;
// FT6336U capacitive touch (FT5x06 compatible)
lgfx::Touch_FT5x06 _touch_instance;
public:
LGFX(void) {
// ---- Bus configuration ----
{
auto cfg = _bus_instance.config();
cfg.port = 0;
cfg.freq_write = 40000000; // 40 MHz
cfg.pin_wr = 47;
cfg.pin_rd = -1; // not connected
cfg.pin_rs = 0; // DC (data/command)
cfg.pin_d0 = 9;
cfg.pin_d1 = 46;
cfg.pin_d2 = 3;
cfg.pin_d3 = 8;
cfg.pin_d4 = 18;
cfg.pin_d5 = 17;
cfg.pin_d6 = 16;
cfg.pin_d7 = 15;
_bus_instance.config(cfg);
_panel_instance.setBus(&_bus_instance);
}
// ---- Panel configuration ----
{
auto cfg = _panel_instance.config();
cfg.pin_cs = -1; // directly driven
cfg.pin_rst = 4;
cfg.pin_busy = -1;
cfg.memory_width = 320;
cfg.memory_height = 480;
cfg.panel_width = 320;
cfg.panel_height = 480;
cfg.offset_x = 0;
cfg.offset_y = 0;
cfg.offset_rotation = 0;
cfg.dummy_read_pixel = 8;
cfg.dummy_read_bits = 1;
cfg.readable = false;
cfg.invert = true;
cfg.rgb_order = false;
cfg.dlen_16bit = false;
cfg.bus_shared = true;
_panel_instance.config(cfg);
}
// ---- Backlight configuration ----
{
auto cfg = _light_instance.config();
cfg.pin_bl = 45;
cfg.invert = false;
cfg.freq = 44100;
cfg.pwm_channel = 7;
_light_instance.config(cfg);
_panel_instance.setLight(&_light_instance);
}
// ---- Touch configuration ----
{
auto cfg = _touch_instance.config();
cfg.x_min = 0;
cfg.x_max = 319;
cfg.y_min = 0;
cfg.y_max = 479;
cfg.pin_int = 7;
cfg.bus_shared = false;
cfg.offset_rotation = 0;
cfg.i2c_port = 1;
cfg.i2c_addr = 0x38;
cfg.pin_sda = 6;
cfg.pin_scl = 5;
cfg.freq = 400000;
_touch_instance.config(cfg);
_panel_instance.setTouch(&_touch_instance);
}
setPanel(&_panel_instance);
}
};
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#pragma once
#include <stdint.h>
#define LOGO_WIDTH 48
#define LOGO_HEIGHT 48
static const uint16_t logo_data[2304] = {
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};
+126
View File
@@ -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);
}
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#include "ui.h"
#include <lvgl.h>
#include "logo.h"
// Custom fonts
LV_FONT_DECLARE(font_tiempos_34);
LV_FONT_DECLARE(font_styrene_28);
LV_FONT_DECLARE(font_styrene_16);
LV_FONT_DECLARE(font_styrene_14);
LV_FONT_DECLARE(font_styrene_12);
LV_FONT_DECLARE(font_mono_18);
// Anthropic brand palette
#define COL_BG lv_color_hex(0x141413)
#define COL_PANEL lv_color_hex(0x1f1f1e)
#define COL_TEXT lv_color_hex(0xfaf9f5)
#define COL_DIM lv_color_hex(0xb0aea5)
#define COL_ACCENT lv_color_hex(0xd97757)
#define COL_GREEN lv_color_hex(0x788c5d)
#define COL_AMBER lv_color_hex(0xd97757)
#define COL_RED lv_color_hex(0xc0392b)
#define COL_BAR_BG lv_color_hex(0x2a2a28)
// Widget handles
static lv_obj_t* lbl_title;
static lv_obj_t* bar_session;
static lv_obj_t* lbl_session_pct;
static lv_obj_t* lbl_session_label;
static lv_obj_t* lbl_session_reset;
static lv_obj_t* bar_weekly;
static lv_obj_t* lbl_weekly_pct;
static lv_obj_t* lbl_weekly_label;
static lv_obj_t* lbl_weekly_reset;
static lv_obj_t* lbl_anim;
// Logo image descriptor for LVGL
static lv_image_dsc_t logo_dsc;
// Animation state
static uint32_t anim_last_ms = 0;
static uint8_t anim_spinner_idx = 0;
static uint8_t anim_msg_idx = 0;
static uint32_t anim_msg_start = 0;
#define ANIM_SPIN_MS 120 // spinner frame speed
#define ANIM_MSG_MS 4000 // how long each message stays
// Claude's spinner characters: · ✻ ✽ ✶ ✳ ✢
// UTF-8 encoded
static const char* const spinner_frames[] = {
"\xC2\xB7", // · (U+00B7)
"\xE2\x9C\xBB", // ✻ (U+273B)
"\xE2\x9C\xBD", // ✽ (U+273D)
"\xE2\x9C\xB6", // ✶ (U+2736)
"\xE2\x9C\xB3", // ✳ (U+2733)
"\xE2\x9C\xA2", // ✢ (U+2722)
};
#define SPINNER_COUNT 6
static const char* const anim_messages[] = {
"Accomplishing", "Elucidating", "Perusing",
"Actioning", "Enchanting", "Philosophising",
"Actualizing", "Envisioning", "Pondering",
"Baking", "Finagling", "Pontificating",
"Booping", "Flibbertigibbeting", "Processing",
"Brewing", "Forging", "Puttering",
"Calculating", "Forming", "Puzzling",
"Cerebrating", "Frolicking", "Reticulating",
"Channelling", "Generating", "Ruminating",
"Churning", "Germinating", "Scheming",
"Clauding", "Hatching", "Schlepping",
"Coalescing", "Herding", "Shimmying",
"Cogitating", "Honking", "Shucking",
"Combobulating", "Hustling", "Simmering",
"Computing", "Ideating", "Smooshing",
"Concocting", "Imagining", "Spelunking",
"Conjuring", "Incubating", "Spinning",
"Considering", "Inferring", "Stewing",
"Contemplating", "Jiving", "Sussing",
"Cooking", "Manifesting", "Synthesizing",
"Crafting", "Marinating", "Thinking",
"Creating", "Meandering", "Tinkering",
"Crunching", "Moseying", "Transmuting",
"Deciphering", "Mulling", "Unfurling",
"Deliberating", "Mustering", "Unravelling",
"Determining", "Musing", "Vibing",
"Discombobulating", "Noodling", "Wandering",
"Divining", "Percolating", "Whirring",
"Doing", "Wibbling",
"Effecting", "Wizarding",
"Working", "Wrangling",
};
#define ANIM_MSG_COUNT (sizeof(anim_messages) / sizeof(anim_messages[0]))
static lv_color_t pct_color(float pct) {
if (pct >= 80.0f) return COL_RED;
if (pct >= 50.0f) return COL_AMBER;
return COL_GREEN;
}
static void format_reset_time(int mins, char* buf, size_t len) {
if (mins < 0) {
snprintf(buf, len, "---");
} else if (mins < 60) {
snprintf(buf, len, "Resets in %dm", mins);
} else if (mins < 1440) {
snprintf(buf, len, "Resets in %dh %dm", mins / 60, mins % 60);
} else {
snprintf(buf, len, "Resets in %dd %dh", mins / 1440, (mins % 1440) / 60);
}
}
static lv_obj_t* make_panel(lv_obj_t* parent, int x, int y, int w, int h) {
lv_obj_t* panel = lv_obj_create(parent);
lv_obj_set_pos(panel, x, y);
lv_obj_set_size(panel, w, h);
lv_obj_set_style_bg_color(panel, COL_PANEL, 0);
lv_obj_set_style_bg_opa(panel, LV_OPA_COVER, 0);
lv_obj_set_style_radius(panel, 8, 0);
lv_obj_set_style_border_width(panel, 0, 0);
lv_obj_set_style_pad_left(panel, 12, 0);
lv_obj_set_style_pad_right(panel, 12, 0);
lv_obj_set_style_pad_top(panel, 10, 0);
lv_obj_set_style_pad_bottom(panel, 16, 0);
lv_obj_clear_flag(panel, LV_OBJ_FLAG_SCROLLABLE);
return panel;
}
static lv_obj_t* make_bar(lv_obj_t* parent, int x, int y, int w, int h) {
lv_obj_t* bar = lv_bar_create(parent);
lv_obj_set_pos(bar, x, y);
lv_obj_set_size(bar, w, h);
lv_bar_set_range(bar, 0, 100);
lv_bar_set_value(bar, 0, LV_ANIM_OFF);
lv_obj_set_style_bg_color(bar, COL_BAR_BG, LV_PART_MAIN);
lv_obj_set_style_bg_opa(bar, LV_OPA_COVER, LV_PART_MAIN);
lv_obj_set_style_radius(bar, 6, LV_PART_MAIN);
lv_obj_set_style_bg_color(bar, COL_GREEN, LV_PART_INDICATOR);
lv_obj_set_style_bg_opa(bar, LV_OPA_COVER, LV_PART_INDICATOR);
lv_obj_set_style_radius(bar, 6, LV_PART_INDICATOR);
return bar;
}
void ui_init(void) {
lv_obj_t* scr = lv_screen_active();
lv_obj_set_style_bg_color(scr, COL_BG, 0);
lv_obj_set_style_bg_opa(scr, LV_OPA_COVER, 0);
// ---- Logo image ----
logo_dsc.header.w = LOGO_WIDTH;
logo_dsc.header.h = LOGO_HEIGHT;
logo_dsc.header.cf = LV_COLOR_FORMAT_RGB565;
logo_dsc.header.stride = LOGO_WIDTH * 2;
logo_dsc.data = (const uint8_t*)logo_data;
logo_dsc.data_size = LOGO_WIDTH * LOGO_HEIGHT * 2;
lv_obj_t* img = lv_image_create(scr);
lv_image_set_src(img, &logo_dsc);
lv_obj_set_pos(img, 10, 4);
// ---- Title (vertically centered to 48px logo) ----
lbl_title = lv_label_create(scr);
lv_label_set_text(lbl_title, "Claude Usage Tracker");
lv_obj_set_style_text_font(lbl_title, &font_tiempos_34, 0);
lv_obj_set_style_text_color(lbl_title, COL_TEXT, 0);
lv_obj_set_pos(lbl_title, 66, 12);
// ---- Session panel ----
// Layout: percentage -> bar -> "5-Hour Session ... Resets in ..." below
lv_obj_t* p_session = make_panel(scr, 8, 56, 464, 100);
lbl_session_pct = lv_label_create(p_session);
lv_label_set_text(lbl_session_pct, "---%");
lv_obj_set_style_text_font(lbl_session_pct, &font_styrene_28, 0);
lv_obj_set_style_text_color(lbl_session_pct, COL_TEXT, 0);
lv_obj_set_pos(lbl_session_pct, 0, 0);
bar_session = make_bar(p_session, 0, 36, 440, 20);
lbl_session_label = lv_label_create(p_session);
lv_label_set_text(lbl_session_label, "Current Session");
lv_obj_set_style_text_font(lbl_session_label, &font_styrene_16, 0);
lv_obj_set_style_text_color(lbl_session_label, COL_DIM, 0);
lv_obj_set_pos(lbl_session_label, 0, 62);
lbl_session_reset = lv_label_create(p_session);
lv_label_set_text(lbl_session_reset, "---");
lv_obj_set_style_text_font(lbl_session_reset, &font_styrene_16, 0);
lv_obj_set_style_text_color(lbl_session_reset, COL_DIM, 0);
lv_obj_set_pos(lbl_session_reset, 440, 62);
lv_obj_set_style_text_align(lbl_session_reset, LV_TEXT_ALIGN_RIGHT, 0);
lv_obj_align(lbl_session_reset, LV_ALIGN_TOP_RIGHT, 0, 62);
// ---- Weekly panel ----
lv_obj_t* p_weekly = make_panel(scr, 8, 166, 464, 100);
lbl_weekly_pct = lv_label_create(p_weekly);
lv_label_set_text(lbl_weekly_pct, "---%");
lv_obj_set_style_text_font(lbl_weekly_pct, &font_styrene_28, 0);
lv_obj_set_style_text_color(lbl_weekly_pct, COL_TEXT, 0);
lv_obj_set_pos(lbl_weekly_pct, 0, 0);
bar_weekly = make_bar(p_weekly, 0, 36, 440, 20);
lbl_weekly_label = lv_label_create(p_weekly);
lv_label_set_text(lbl_weekly_label, "Current Week");
lv_obj_set_style_text_font(lbl_weekly_label, &font_styrene_16, 0);
lv_obj_set_style_text_color(lbl_weekly_label, COL_DIM, 0);
lv_obj_set_pos(lbl_weekly_label, 0, 62);
lbl_weekly_reset = lv_label_create(p_weekly);
lv_label_set_text(lbl_weekly_reset, "---");
lv_obj_set_style_text_font(lbl_weekly_reset, &font_styrene_16, 0);
lv_obj_set_style_text_color(lbl_weekly_reset, COL_DIM, 0);
lv_obj_align(lbl_weekly_reset, LV_ALIGN_TOP_RIGHT, 0, 62);
// ---- Animation at bottom ----
lbl_anim = lv_label_create(scr);
lv_label_set_text(lbl_anim, "");
lv_obj_set_style_text_font(lbl_anim, &font_mono_18, 0);
lv_obj_set_style_text_color(lbl_anim, COL_ACCENT, 0);
lv_obj_align(lbl_anim, LV_ALIGN_BOTTOM_MID, 0, -16);
}
void ui_update(const UsageData* data) {
if (!data->valid) return;
int s_pct = (int)(data->session_pct + 0.5f);
lv_label_set_text_fmt(lbl_session_pct, "%d%%", s_pct);
lv_bar_set_value(bar_session, s_pct, LV_ANIM_ON);
lv_obj_set_style_bg_color(bar_session, pct_color(data->session_pct), LV_PART_INDICATOR);
char buf[48];
format_reset_time(data->session_reset_mins, buf, sizeof(buf));
lv_label_set_text(lbl_session_reset, buf);
int w_pct = (int)(data->weekly_pct + 0.5f);
lv_label_set_text_fmt(lbl_weekly_pct, "%d%%", w_pct);
lv_bar_set_value(bar_weekly, w_pct, LV_ANIM_ON);
lv_obj_set_style_bg_color(bar_weekly, pct_color(data->weekly_pct), LV_PART_INDICATOR);
format_reset_time(data->weekly_reset_mins, buf, sizeof(buf));
lv_label_set_text(lbl_weekly_reset, buf);
}
void ui_tick_anim(void) {
uint32_t now = lv_tick_get();
// Switch to next message
if (now - anim_msg_start >= ANIM_MSG_MS) {
anim_msg_idx = (anim_msg_idx + 1) % ANIM_MSG_COUNT;
anim_msg_start = now;
}
// Spin the spinner
if (now - anim_last_ms >= ANIM_SPIN_MS) {
anim_last_ms = now;
anim_spinner_idx = (anim_spinner_idx + 1) % SPINNER_COUNT;
static char buf[80];
snprintf(buf, sizeof(buf), "%s %s\xE2\x80\xA6",
spinner_frames[anim_spinner_idx],
anim_messages[anim_msg_idx]);
lv_label_set_text(lbl_anim, buf);
}
}
void ui_set_status(const char* text) {
(void)text;
}
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#pragma once
#include "data.h"
void ui_init(void);
void ui_update(const UsageData* data);
void ui_tick_anim(void);
void ui_set_status(const char* text);