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| PartNumber | ESP-WROOM-02 | ESP-WROOM-02D | ESP-WROOM-02U |
| Description | WiFi Modules (802.11) SMD Module, ESP8266EX, 16Mbits SPI flash, UART Mode | WiFi Modules (802.11) SMD MODULE,ESP8266EX 2MBITS SPI FLASH | WiFi Modules (802.11) SMD MODULE,ESP8266EX 2MBITS SPI FLASH |
| Manufacturer | Espressif | Espressif | Espressif |
| Product Category | WiFi Modules (802.11) | WiFi Modules (802.11) | WiFi Modules (802.11) |
| RoHS | Y | - | - |
| Protocol Supported | 802.11 b/g/n | 802.11 b/g/n | 802.11 b/g/n |
| Frequency | 2.4 GHz to 2.5 GHz | 2.4 GHz to 2.5 GHz | 2.4 GHz to 2.5 GHz |
| Data Rate | 72.2 Mb/s | 72.2 Mb/s | 72.2 Mb/s |
| Interface Type | GPIO, HSPI, I2C, I2S, UART | Serial | Serial |
| Output Power | 20 dBm | 20 dBm | 20 dBm |
| Operating Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| Supply Current Transmitting | 170 mA | 170 mA | 170 mA |
| Supply Current Receiving | 56 mA | 56 mA | 56 mA |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Dimensions | 18 mm x 20 mm x 3 mm | 18 mm x 20 mm x 3.2 mm | 18 mm x 14.3 mm x 3.2 mm |
| Packaging | Reel | - | - |
| Security | WPA/WPA2 | WPA, WPA2 | WPA, WPA2 |
| Series | ESP-WROOM | ESP-WROOM | ESP-WROOM |
| Brand | Espressif Systems | Espressif Systems | Espressif Systems |
| Antenna Connector Type | PCB | PCB | U.FL |
| Moisture Sensitive | Yes | Yes | Yes |
| Product Type | WiFi Modules | WiFi Modules | WiFi Modules |
| Factory Pack Quantity | 650 | 650 | 650 |
| Subcategory | Wireless & RF Modules | Wireless & RF Modules | Wireless & RF Modules |
| Unit Weight | 0.044092 oz | - | - |