What is the typical turnaround time?

Delivery time depends upon type of project but usually takes 2–5 business days. Rush turnarounds (24–48h) are available for an additional fee — ask when you send your brief.

How many revisions are included?

One revision round. A revision round means one consolidated set of feedback, not multiple back-and-forth exchanges.

What are your payment terms?

50% deposit required to begin work. Remaining 50% due on delivery before final files are released.

What file formats do you deliver?

Firmware: .ino / .cpp source files plus a compiled .bin. Circuit diagrams: PDF plus EasyEDA Gerber files. Documents: DOCX and PDF. Quick-start guides: Markdown and PDF. Custom formats available on request.

Do you work with international clients?

Yes. All communication is in English and I work across time zones.

What information do you need to start?

For firmware: target MCU, sensor list, desired functionality, and any existing code. For documents: your background, target institution/program (for academic work), or product specs (for technical docs).

Building a Custom ESP32 Web Server with SPIFFS

Building a custom ESP32 web server with SPIFFS (SPI Flash File System) or LittleFS enables developers to deliver fast, standalone browser interfaces without external cloud servers. Storing frontend assets in onboard flash cleanly separates C++ firmware from HTML/JS user interfaces.

1. Why move away from inline C++ HTML strings

Embedding HTML inside raw C++ string literals in your main sketch makes code difficult to maintain, increases binary size, and limits styling. Storing clean index.html, style.css, and app.js files inside flash allows developers to test frontends locally in desktop browsers before flashing.

2. Using ESPAsyncWebServer for non-blocking performance

Standard blocking WebServer libraries stall loop execution when serving heavy assets. Implementing ESPAsyncWebServer handles concurrent HTTP client requests asynchronously using background FreeRTOS tasks, preventing sensor sampling dropouts.

Serve static files directly from flash with server.serveStatic("/", SPIFFS, "/").setDefaultFile("index.html").
Handle live JSON telemetry streams using lightweight asynchronous REST endpoints.
Enable gzip compression on CSS and JS files to reduce flash memory transfer times.

3. Managing remote updates and telemetry

Pairing local web servers with over-the-air firmware updates provides a complete local IoT controller. For implementation details on remote flashing, review our guide to ESP32 OTA firmware updates[cite: 2].

4. LittleFS vs SPIFFS: Why modern firmware is migrating

While SPIFFS remains widely used, LittleFS provides faster file indexing, lower RAM overhead, real directory support, and improved power-loss resilience against flash corruption during unexpected reboots.

When to get help

If you'd rather have this handled directly, see our IoT & Embedded Development Services for scope and turnaround times.