{"product_id":"esp32-c3-super-mini-dev-board-042-oled-wifi-bluetooth","title":"ESP32-C3 Super Mini Dev Board – 0.42\" OLED, WiFi \u0026 Bluetooth","description":"\n\u003ch2\u003eESP32-C3 Super Mini Development Board with 0.42\" OLED Display\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eESP32-C3 Super Mini Development Board\u003c\/strong\u003e is a compact, powerful microcontroller board based on the \u003cstrong\u003eESP32-C3FN4\/FH4\u003c\/strong\u003e chip. Featuring a built-in \u003cstrong\u003e0.42-inch OLED display\u003c\/strong\u003e, dual-mode \u003cstrong\u003eWiFi and Bluetooth\u003c\/strong\u003e connectivity, a high-performance \u003cstrong\u003eceramic antenna\u003c\/strong\u003e, and \u003cstrong\u003e4MB of onboard Flash\u003c\/strong\u003e, this board is the ideal choice for IoT prototyping, wearable projects, and space-constrained embedded applications.\u003c\/p\u003e\n\n\u003cp\u003e⚠️ \u003cstrong\u003eImportant Note:\u003c\/strong\u003e This 0.42-inch OLED screen uses a \u003cstrong\u003e128×64 resolution with a display starting point of (13, 14)\u003c\/strong\u003e — it is \u003cstrong\u003eNOT a direct drop-in replacement\u003c\/strong\u003e for other standard 0.42-inch OLED modules. Please ensure your code and libraries account for this offset before purchasing.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip:\u003c\/strong\u003e ESP32-C3FN4 \/ ESP32-C3FH4 — RISC-V 32-bit single-core processor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in Flash:\u003c\/strong\u003e 4MB onboard Flash memory\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 0.42-inch OLED screen, 128×64 resolution (active area: 40×2 offset start at 13,14)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWireless Connectivity:\u003c\/strong\u003e WiFi (2.4GHz 802.11 b\/g\/n) + Bluetooth 5.0 (LE)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAntenna:\u003c\/strong\u003e Ceramic antenna for reliable wireless signal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUSB Download:\u003c\/strong\u003e Supports direct USB flashing — no external programmer needed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eForm Factor:\u003c\/strong\u003e Super Mini — ultra-compact design for tight spaces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomizable:\u003c\/strong\u003e Fully programmable via Arduino IDE, ESP-IDF, and MicroPython\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n    \u003cth style=\"text-align:left; padding:8px; border:1px solid #ddd;\"\u003eParameter\u003c\/th\u003e\n    \u003cth style=\"text-align:left; padding:8px; border:1px solid #ddd;\"\u003eValue\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMCU\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eESP32-C3FN4 \/ FH4\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eFlash Memory\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e4MB\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eDisplay\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e0.42\" OLED, 128×64 (start point: 13,14)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eWiFi\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e2.4GHz 802.11 b\/g\/n\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eBluetooth\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eBluetooth 5.0 LE\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eAntenna\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCeramic Antenna\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eProgramming\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eUSB (direct download)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCountry of Origin\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMade in China\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWho Is This For?\u003c\/h3\u003e\n\u003cp\u003eThis board is perfect for \u003cstrong\u003emakers, hobbyists, engineers, and students\u003c\/strong\u003e who need a tiny but capable development board for IoT devices, smart sensors, BLE beacons, data loggers, wearable electronics, and any WiFi\/Bluetooth-enabled project where board size matters.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × ESP32-C3 Super Mini Development Board with 0.42\" OLED\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.energystar.gov\/products\" target=\"_blank\" rel=\"noopener\"\u003eENERGY STAR product efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Can I replace my existing 0.42-inch OLED module with this ESP32-C3 OLED board directly?\u003c\/h4\u003e\n\u003cp\u003eA: No. This 0.42-inch OLED uses a 128×64 resolution with a display starting offset of (13, 14), which differs from most standard 0.42-inch OLED modules. You will need to adjust your display initialization code and library settings to account for this offset. It is not a plug-and-play replacement for other 0.42-inch OLED screens.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What programming environments are compatible with the ESP32-C3 Super Mini board?\u003c\/h4\u003e\n\u003cp\u003eA: The ESP32-C3 Super Mini development board is compatible with the \u003cstrong\u003eArduino IDE\u003c\/strong\u003e (with ESP32 board support package), \u003cstrong\u003eESP-IDF\u003c\/strong\u003e (Espressif's native framework), and \u003cstrong\u003eMicroPython\u003c\/strong\u003e. It supports USB direct download, so no external programmer or USB-to-UART adapter is required.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the ESP32-C3 board support both WiFi and Bluetooth simultaneously?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The ESP32-C3 chip supports dual-mode wireless operation with \u003cstrong\u003e2.4GHz WiFi (802.11 b\/g\/n)\u003c\/strong\u003e and \u003cstrong\u003eBluetooth 5.0 Low Energy (BLE)\u003c\/strong\u003e. The onboard ceramic antenna provides reliable wireless performance in both modes.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How much Flash memory does this development board have?\u003c\/h4\u003e\n\u003cp\u003eA: The ESP32-C3 Super Mini board comes with \u003cstrong\u003e4MB of built-in Flash memory\u003c\/strong\u003e, providing ample storage for your firmware, application data, and file system (e.g., LittleFS or SPIFFS).\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Can I replace my existing 0.42-inch OLED module with this ESP32-C3 OLED board directly?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. This 0.42-inch OLED uses a 128×64 resolution with a display starting offset of (13, 14), which differs from most standard 0.42-inch OLED modules. You will need to adjust your display initialization code and library settings to account for this offset. 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