Wi-Fi modules made by ESPRESSIF SYSTEMS
| Manufacturer | ESPRESSIF |
| Communications module | WiFi |
| Components | ESP8266EX |
| Communictions protocol | FTP, HTTP, IEEE 802.11b/g/n, IPv4, TCP, UDP |
| Interface | GPIO; I2C; I2S; PWM; SDIO; SPI; UART |
| Ciphering | AES, WPA, WPA2, WPS |
| Mounting | SMD |
| Symbol | Rec. sensit. | Transm. power | Antenna | Connection | Usup | Dimensions | Memory |
|---|---|---|---|---|---|---|---|
| [dBm] | [V DC] | [mm] | [MB] | ||||
| ESP-WROOM-02D | b: -91 dBm, g: -75 dBm, n: -72 dBm | 20 | PCB | - | 2.7...3.6 | 18x20x3.2 | 2 FLASH |
| ESP-WROOM-02D-4 | b: -91 dBm, g: -75 dBm, n: -72 dBm | 20 | PCB | - | 2.7...3.6 | 18x20x3.2 | 4 FLASH |
| ESP-WROOM-02U | b: -91 dBm, g: -75 dBm, n: -72 dBm | 20 | - | IPEX | 2.7...3.6 | 18x14.3x3.2 | 2 FLASH |
| ESP-WROOM-02U-4 | b: -91 dBm, g: -75 dBm, n: -72 dBm | 20 | - | IPEX | 2.7...3.6 | 18x14.3x3.2 | 4 FLASH |
