Espressif Systems ESP-WROOM-02D-N4-4MB-WI-1665-D

ESP-WROOM-02D are ESP8266EX-based modules developed by Espressif. Compared to ESP-WROOM-02, the RF performance of ESP-WROOM-02D are optimized. The ESP8266EX integrates a Tensilica L106 32-bit RISC processor, which achieves extra-low power consumption and reaches a maximum clock speed of 160 MHz. The Real-Time Operating System (RTOS) and Wi-Fi stack allow 80% of the processing power to be available for user application programming and development.

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ESP-WROOM-02D-N4-4MB Specifications :-

RF certification: SRRC, FCC, CE (RED), IC, NCC, KCC, TELEC (MIC)
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 GPIO/PWM
Operating voltage: 2.7 V ~ 3.6 V
Operating current Average: 80 mA
Minimum current delivered by power supply : 500 mA
Operating temperature range: -40 °C ~ 85 °C
Storage temperature: -40 °C ~ 85 °C