ESP-WROOM-02U is ESP8266EX-based modules developed by Espressif. Compared to ESP-WROOM-02, the RF performance of ESP-WROOM-02U is optimized. Besides, ESP-WROOM-02U integrates a U.FL connector.
Specifications
| RF certification | See certificates from ESP-WROOM-02D and ESP-WROOM-02U |
| Green certification | RoHS, REACH |
| Reliability | HTOL/HTSL/uHAST/TCT/ESD |
| Wi-Fi protocols | 802.11 b/g/n |
| Frequency range | 2.4 GHz ~ 2.5 GHz (2400 MHz ~ 2483.5 MHz) |
| Peripheral interface | UART/HSPI/I2C/I2S/IR Remote Control |
| Operating voltage | 2.7 V ~ 3.6 V |
| Operating current | Average: 80 mA |
| Minimum current delivered by power supply | 500 mA |
| External interface | - |
| Moisture sensitivity level | Level 3 |
| Wi-Fi mode | Station/SoftAP/SoftAP + Station |
| Security | WPA/WPA2 |
| Encryption | WEP/TKIP/AES |
| Firmware upgrade | UART Download/OTA (via network)/Download and write firmware via host |
| Software development | Supports Cloud Server Development/SDK for custom firmware development |
| Network protocols | IPv4, TCP/UDP/HTTP/FTP |
| User configuration | AT Instruction Set, Cloud Server, Android/iOS app |