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Espressif Systems ESP-WROOM-02U-N2
- Part No.:
- ESP-WROOM-02U-N2
- Manufacturer:
- Espressif Systems
- Category:
- RF Transceiver Modules and Modems
- Package:
- 18-SMD Module
- Datasheet:
-
ESP-WROOM-02U-N2.pdf
- Description:
- RF TXRX MODULE WIFI U.FL SMD
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ESP-WROOM-02U-N2 from Espressif Systems is a wireless module or system-in-package implementation based on the ESP8266 platform, integrating the Espressif wireless MCU architecture with RF front-end, flash or PSRAM options, antenna configuration, and production-ready module hardware depending on the exact ordering code.
Designed for legacy Wi-Fi modules, smart plugs, wireless sensors, simple cloud-connected devices, consumer IoT boards, and low-cost embedded Wi-Fi systems, the ESP-WROOM-02U-N2 fits systems that require embedded wireless connectivity, deterministic control, software-defined peripheral assignment, and compact production hardware. Compared with simple radio modules, Espressif devices usually combine MCU execution, RF connectivity, security blocks, power management, and SDK support within one chip or module family.
The ESP8266 platform provides Espressif wireless MCU architecture for 2.4 GHz Wi-Fi connectivity, 2.4 GHz 802.11 b/g/n Wi-Fi connectivity, external or embedded flash resources depending on ESP8266EX, ESP8285, or module configuration, and GPIO, UART, SPI, I2C by software usage, PWM, ADC and embedded control resources for the exact chip or module variant. The ordering code indicates 2 MB flash; final variant mapping should be confirmed against the Espressif series comparison or module ordering table. The antenna-related suffix indicates integrated PCB antenna version, so RF layout, antenna keep-out, and enclosure material should be reviewed during PCB design. For engineers evaluating the ESP-WROOM-02U-N2 datasheet, ESP-WROOM-02U-N2 pinout, ESP-WROOM-02U-N2 application, or ESP-WROOM-02U-N2 equivalent, the device should be selected by matching wireless protocol, memory size, antenna path, GPIO count, package footprint, security requirements, and software ecosystem support.
Technical Context
In product-level wireless designs, ESP-WROOM-02U-N2 is used as an Espressif module based on the ESP8266 / ESP8285 platform. The module approach integrates the SoC, RF front end, matching network, crystal, flash or PSRAM configuration, shielded module hardware, and antenna option into a production-ready wireless building block.
The platform provides Tensilica L106 32-bit processor with clock speeds up to 160 MHz and 2.4 GHz 802.11 b/g/n Wi-Fi. The orderable code indicates 2 MB flash; antenna selection is external antenna connector / U.FL or IPEX-style antenna variant where applicable. These details directly affect OTA partition sizing, local data buffering, AI/audio workload capacity, RF layout, enclosure design, and sourcing compatibility.
For PCB integration, ESP-WROOM-02U-N2 should be placed with the required antenna keep-out, solid ground reference, clean 3.3V supply, correct boot strapping, accessible UART or USB download path, and controlled routing for exposed GPIO, SPI, I2C, I2S, ADC, PWM, or other application interfaces. Replacement with another Espressif module should preserve memory size, antenna variant, pinout, regulatory path, and firmware assumptions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Product Type | Wireless MCU module based on the ESP8266 / ESP8285 platform. |
| CPU Architecture | Tensilica L106 32-bit processor with clock speeds up to 160 MHz. |
| Wireless Connectivity | 2.4 GHz 802.11 b/g/n Wi-Fi. |
| Memory Configuration | 2 MB flash. |
| Antenna Configuration | external antenna connector / U.FL or IPEX-style antenna variant where applicable. |
| Peripheral Resources | GPIO, SPI, SDIO, UART, I2C-like software interfaces, I2S, PWM, ADC, timers, and Wi-Fi MAC/baseband/radio resources. |
| Security Resources | Wi-Fi security features and firmware-based security functions used in legacy ESP8266 designs. |
| PCB Integration Meaning | Module footprint, antenna keep-out, 3.3V supply, boot strapping, and programming access must match the selected module variant. |
| Replacement Risk | Do not substitute only by ESP32 family name; match memory suffix, antenna variant, module footprint, temperature grade, and firmware assumptions. |
Pinout & Package
ESP-WROOM-02U-N2 uses a production module or system-in-package footprint built around the ESP8266 Wi-Fi module platform. The package exposes power, ground, enable, boot-control, programming, GPIO, peripheral, and RF-related connections through the module pads or integrated SiP connections while keeping the RF front-end and memory configuration inside the Espressif-qualified hardware boundary.
Flash option indicated by the order code: 2 MB flash. This orderable configuration uses an external antenna path such as U.FL / IPEX, so the RF connector, coax route, antenna placement, and enclosure clearances become part of the module-level RF design. In a custom PCB, the module end with the antenna or RF connector should be placed at the board edge when possible, while boot pins, EN, UART/USB programming, and frequently used peripheral GPIOs should remain accessible for bring-up and production test.
| Pin / Function | PCB Design and Circuit Role |
|---|---|
| 3V3 and GND Pins | Provide the module power input and low-impedance return paths; place decoupling close to the module power pins and avoid sharing noisy current loops. |
| EN / Reset Pin | Controls chip enable and reset behavior; the pull-up and RC timing should support stable startup during RF current peaks. |
| BOOT / Strapping Pins | Define download mode and normal boot state at reset; external circuits must not force invalid levels during power-up. |
| UART / USB Download Access | Programming and log output should remain accessible through the module-supported serial or USB download path used by the underlying ESP8266 Wi-Fi module platform. |
| GPIO / Peripheral Pins | Expose software-mapped peripheral functions such as SPI, I2C, UART, I2S, PWM, ADC, touch, camera, display, TWAI, or low-power wake depending on the platform. |
| U.FL / IPEX Antenna Connector | This orderable configuration uses an external antenna path such as U.FL / IPEX, so the RF connector, coax route, antenna placement, and enclosure clearances become part of the module-level RF design. |
| Flash / PSRAM Configuration | Flash option indicated by the order code: 2 MB flash. |
Key Features
- ESP8266 platform integration: combines MCU processing, wireless connectivity, memory architecture, and peripheral routing in a single Espressif ecosystem device.
- Wireless protocol coverage: 2.4 GHz 802.11 b/g/n Wi-Fi connectivity.
- Embedded software support: suitable for ESP-IDF-based firmware development, OTA workflows, provisioning, networking stacks, and security configuration.
- Hardware integration focus: RF layout, power integrity, boot strapping, flash/PSRAM selection, and antenna design should be validated against the Espressif reference material.
- Production suitability: modules and DevKits simplify evaluation, while SoC-level variants support custom PCB designs requiring full RF and power-layout control.
- Security and lifecycle value: secure boot, flash encryption, cryptographic accelerators, and device identity features help support connected-product deployment.
Applications
| ESP8266 / ESP8285 Connected Products | Wireless Provisioning and Cloud Connectivity |
|---|---|
|
Use Scenario: smart plugs, lighting controllers, Wi-Fi sensors, appliance controllers, simple gateways, and UART-to-Wi-Fi bridge products IC Role: ESP-WROOM-02U-N2 provides the module-level MCU and radio subsystem for connected product designs. Use Value: Supports mature low-cost wi-fi products where bluetooth, modern risc-v security features, or multi-protocol connectivity are not required. |
Use Scenario: Mobile-app onboarding, BLE commissioning, Wi-Fi provisioning, Thread/Zigbee commissioning where supported, and OTA-capable devices. IC Role: The module executes wireless protocol stacks and firmware services using 2.4 GHz 802.11 b/g/n Wi-Fi. Use Value: Reduces wireless-design complexity compared with SoC-level RF implementation. |
| Sensor, Control and Edge Processing | Certified Module Integration |
|
Use Scenario: Sensor hubs, control boards, relay outputs, local UI devices, and low-power monitoring nodes. IC Role: ESP-WROOM-02U-N2 uses Tensilica L106 32-bit processor with clock speeds up to 160 MHz and exposes module GPIO/peripheral resources for application control. Use Value: Supports local decision-making without adding a separate host MCU in many products. |
Use Scenario: Smart appliances, industrial controllers, consumer electronics, gateway modules, and compact wireless PCBs. IC Role: The module integrates RF hardware, memory configuration, shielding, and antenna option into a repeatable production component. Use Value: Simplifies RF sourcing and layout when the memory suffix, antenna option, and module footprint match the design. |
Equivalent & Alternatives
When evaluating a ESP-WROOM-02U-N2 equivalent, engineers should compare wireless protocol support, CPU architecture, memory configuration, antenna option, GPIO availability, package footprint, module certification route, software compatibility, and long-term availability.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESP-WROOM-02D / ESP-WROOM-02U | Module options with PCB or external antenna configurations. | Used for legacy Wi-Fi module products and replacement designs. | Choose ESP-WROOM-02U-N2 when existing ESP8266/ESP8285 software and module footprint must be maintained. |
| ESP8684 series | Modern RISC-V Wi-Fi/BLE family with Bluetooth LE support. | Used for new low-cost Wi-Fi/BLE products. | Use ESP8266/ESP8285 when compatibility with existing Wi-Fi-only products is required. |
| ESP32-C3 family | RISC-V Wi-Fi/BLE alternative with more modern security and peripheral resources. | Used for new low-power Wi-Fi/BLE endpoint designs. | Use ESP32-C3 for new designs needing Bluetooth LE and secure IoT features. |
Selection Recommendation: ESP-WROOM-02U-N2 is most suitable when the design requirements align with the ESP8266 platform, the exact ordering suffix, and the Espressif datasheet or module reference design. Replacement should not be based on wireless protocol alone; memory size, antenna configuration, boot pins, RF layout, and software compatibility must also match.
Quality
For reliable deployment, ESP-WROOM-02U-N2 should be sourced as an original Espressif Systems component or Espressif development product with traceable procurement records, manufacturer labeling verification, ESD-safe handling, and moisture-sensitive-device control where applicable.
Inspection processes may include package marking review, reel or tray label verification, module shield inspection, solderability testing, X-ray inspection for modules or SiP devices, RF functional testing, programming verification, and incoming inspection under production requirements.
Because Espressif devices combine RF, MCU, memory, and security resources, production reliability depends on correct power sequencing, RF layout, boot-mode configuration, firmware validation, thermal margin, antenna matching, and ESP-IDF software compatibility.
Availability
ESP-WROOM-02U-N2 available at Aetrix Electronics and suitable for engineering evaluation, prototype development, production sourcing, IoT product manufacturing, module replacement, and wireless embedded system integration.
Supply support may include reel or tray procurement, module sourcing, development-board sourcing, scheduled delivery planning, BOM continuity assistance, shortage mitigation, and long-term lifecycle support for connected-device production.
For production deployment, confirming the exact part number, datasheet revision, memory suffix, antenna type, operating temperature, package footprint, programming method, and software compatibility helps reduce sourcing and design-in risk.
Manufacturer
Espressif Systems is a semiconductor company focused on wireless SoCs, modules, development platforms, and software ecosystems for IoT, AIoT, smart home, industrial control, consumer electronics, low-power sensing, and connected embedded devices.
The Espressif portfolio includes ESP32, ESP32-S, ESP32-C, ESP32-H, ESP868x, ESP8266, modules, DevKits, production tools, and software frameworks such as ESP-IDF, enabling designers to build Wi-Fi, Bluetooth, Thread, Zigbee, Matter, and multi-protocol connected products.
FAQ
What is ESP-WROOM-02U-N2 used for?
ESP-WROOM-02U-N2 is used for ESP8266 / ESP8285 Connected Products, Wireless Provisioning and Cloud Connectivity, Sensor, Control and Edge Processing, Certified Module Integration. It gives product designers an integrated Espressif wireless module or SiP option for production hardware without designing the full RF subsystem from a bare SoC.
What platform or product type does ESP-WROOM-02U-N2 belong to?
ESP-WROOM-02U-N2 is an ESP8266/ESP8285-based embedded wireless module or SiP. Wireless MCU module based on the ESP8266 / ESP8285 platform. 2.4 GHz 802.11 b/g/n Wi-Fi.
What hardware design points matter for ESP-WROOM-02U-N2?
For ESP-WROOM-02U-N2, PCB design should prioritize module land pattern, power-supply decoupling, EN/BOOT strapping, UART or USB programming access, RF antenna keep-out, ground clearance, and thermal placement.
What configuration details should be checked for ESP-WROOM-02U-N2?
For ESP-WROOM-02U-N2, the main configuration points are Memory Configuration: 2 MB flash. Wireless Connectivity: 2.4 GHz 802.11 b/g/n Wi-Fi. CPU Architecture: Tensilica L106 32-bit processor with clock speeds up to 160 MHz. The orderable suffix and PCB implementation should also reflect 2 MB flash; U / IPEX antenna variant requiring an external antenna path and RF connector layout.
What are common ESP-WROOM-02U-N2 alternative or comparison points?
ESP-WROOM-02U-N2 should be compared with other ESP8266/ESP8285 modules by flash or PSRAM option, antenna version, module size, pin compatibility, operating temperature, and RF certification path.
What documents are important for ESP-WROOM-02U-N2 design or production?
For ESP-WROOM-02U-N2, use the module datasheet, hardware design guidelines, land-pattern drawing, antenna placement notes, power-supply guidance, and related ESP8266/ESP8285 chip documentation before PCB design.
ESP-WROOM-02U-N2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Espressif Systems
- Series:
- ESP
- Package/Case:
- 18-SMD Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- RF Family/Standard:
- WiFi
- Protocol:
- 802.11b/g/n
- Modulation:
- 64-QAM, BPSK, CCK, OFDM
- Frequency:
- 2.4GHz ~ 2.5GHz
- Data Rate:
- 72.2Mbps
- Power - Output:
- 20.5dBm
- Sensitivity:
- -98dBm
- Serial Interfaces:
- GPIO, I2C, I2S, PWM, UART
- Antenna Type:
- Antenna Not Included, U.FL
- Utilized IC / Part:
- ESP8266EX
- Memory Size:
- 2MB Flash, 50kB RAM
- Voltage - Supply:
- 2.7V ~ 3.6V
- Current - Receiving:
- -
- Current - Transmitting:
- 120mA ~ 170mA
- Mounting Type:
- Surface Mount
- Operating Temperature:
- -40°C ~ 85°C
ESP-WROOM-02U-N2 FAQ
1.How can I place an order for ESP-WROOM-02U-N2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ESP-WROOM-02U-N2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ESP-WROOM-02U-N2 reliable?
The price and inventory of ESP-WROOM-02U-N2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ESP-WROOM-02U-N2 is usually 5 days.
3.What payment methods are accepted for ESP-WROOM-02U-N2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ESP-WROOM-02U-N2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ESP-WROOM-02U-N2?
ESP-WROOM-02U-N2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ESP-WROOM-02U-N2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ESP-WROOM-02U-N2?
For technical support, including ESP-WROOM-02U-N2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ESP-WROOM-02U-N2 requirements.
6.How does Aetrix verify that ESP-WROOM-02U-N2 is sourced from the original manufacturer or authorized distributors?
All ESP-WROOM-02U-N2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ESP-WROOM-02U-N2 meets industry standards.
7.What is the process for return or replacement of ESP-WROOM-02U-N2?
All ESP-WROOM-02U-N2 units undergo pre-shipment inspection (PSI). If there is an issue with ESP-WROOM-02U-N2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ESP-WROOM-02U-N2 part is unused and in its original packaging.
Return procedure for ESP-WROOM-02U-N2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ESP-WROOM-02U-N2 Tags
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ESP32-C3FH4
Espressif Systems
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ESP32-S2FH4
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ESP32-S2FN4R2
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ESP32-C3-MINI-1-N4
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ESP32-C3-WROOM-02-N4
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ESP32-C3-MINI-1U-N4
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ESP32-C3-MINI-1U-H4
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ESP32-C3-WROOM-02U-N4
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ESP32-H2-MINI-1-N4
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ESP32-H2-MINI-1-H4
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