{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ESP32-C3-WROOM-02U-N4","brand":"Espressif Systems","brandSlug":"espressif","productSlug":"ESP32-C3-WROOM-02U-N4","canonicalUrl":"https://icboms.com/espressif/ESP32-C3-WROOM-02U-N4","factsUrl":"https://icboms.com/api/mcp/products/ESP32-C3-WROOM-02U-N4","rawCanonicalId":null},"summary":{"shortDescription":"Espressif Systems ESP32 series, ESP32-C3-WROOM-02U-N4, 19-SMD module, 2.4 GHz 802.11b/g/n + Bluetooth v5.0, 150 Mbps data rate, 4 MB flash, 408 kB SRAM, PCB trace antenna, 20.5 dBm output, -40°C to 105°C operation.","salesMarkdown":"The ESP32-C3-WROOM-02U-N4 is a surface-mount module built around the Espressif ESP32-C3 RISC-V single-core microcontroller. It integrates 4 MB flash, 384 kB ROM, and 408 kB SRAM on the module. The PCB trace antenna means the module does not need an external antenna connector or a separate antenna part — the trade-off is that the board ground plane and nearby metal affect the resonance, so the antenna matching network should be tuned on the final PCB stack-up. Start from the Espressif antenna tuning guide in the hardware design guidelines. Rated conducted output power is 20.5 dBm. This covers outdoor gateways, engine-bay telematics, and factory-floor sensor bridges without a separate temperature-grade variant. The supply voltage is 3.0 V to 3.6 V; a 3.3 V rail with ±5 % tolerance stays inside the window. Receive current is 82–84 mA; transmit current ranges from 280 mA to 345 mA depending on output power setting. ## Serial interfaces and peripheral set The ESP32-C3 exposes ADC, GPIO, I²C, I²S, SPI, JTAG, PWM, UART, and USB serial interfaces on the module pads. The USB serial peripheral can serve as a direct programming interface — no external USB-to-UART bridge needed for firmware updates. Bluetooth v5.0 supports LE with 2 Mbps PHY, advertising extensions, and mesh profile — the same BLE stack that runs on the larger ESP32 series. The 802.11b/g/n radio delivers up to 150 Mbps PHY rate in HT40 mode.","metaTitle":"ESP32-C3-WROOM-02U-N4 – Espressif Systems RF Module","metaDescription":"ESP32-C3-WROOM-02U-N4: RISC-V module with 4 MB flash, 408 kB SRAM, PCB trace antenna, 20.5 dBm output, -40°C to 105°C. Active production. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["RF & Wireless ICs"],"specifications":{"Mfr":"Espressif Systems","Series":"ESP32","Package":"Tape & Reel (TR); Cut Tape (CT)","Protocol":"802.11b/g/n, Bluetooth v5.0","Data Rate":"150Mbps","Frequency":"2.4GHz","Modulation":"-","Memory Size":"4MB Flash, 384kB ROM, 408kB SRAM","Sensitivity":"-98dBm","Antenna Type":"PCB Trace","Mounting Type":"Surface Mount","Package / Case":"19-SMD Module","Power - Output":"20.5dBm","Product Status":"Active","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Serial Interfaces":"ADC, GPIO, I²C, I²S, SPI, JTAG, PWM, UART, USB","RF Family/Standard":"Bluetooth, WiFi","Utilized IC / Part":"ESP32-C3","Current - Receiving":"82mA ~ 84mA","Operating Temperature":"-40°C~105°C(TA)","Current - Transmitting":"280mA ~ 345mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.1500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e3dd947528135348ad64f77663604575.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ESP32-C3-WROOM-02U-N4/alternatives.json"},"ai":{"faq":[{"question":"What is the flash memory size of the ESP32-C3-WROOM-02U-N4?","answer":"The module carries 4 MB flash — the N4 suffix denotes the 4 MB variant."},{"question":"Does the ESP32-C3-WROOM-02U-N4 support Bluetooth 5?","answer":"Yes, the module supports Bluetooth v5.0 including LE 2 Mbps PHY, advertising extensions, and mesh networking."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/espressif/ESP32-C3-WROOM-02U-N4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/espressif/ESP32-C3-WROOM-02U-N4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}