Main frequency is up to 240MHz, and computing power is up to 600DMIPS;Built-in 520KB SRAM, external 8MB PSRAM Compatible with UART/SPI/I2C/ PWM/ADC/DAC and other interfaces Support 2640 and OV7670 cameras, built-in flash Support STA/AP/STA+AP mode. USB to serial port CH340G. If you have any questions, please feel free to contact me Adopting micro USB interface, a convenient and reliable connection method, applied to various occasions of IoT hardware terminals. Parameter: Using low-power dual-core 32-bit processor, it can be used as an application processor. Support Image WiFI Download Support TF Card Supports multiple sleep modes. Built-in Lwip and FreeRTOS Support Smart Config / AirKiss one-click network configuration Support secondary developmentSpecification: Operating voltage: 4.75-5.25V SPIFlash: Default 32Mbit RAM: internal 520 KB + external PSRAM 8 MB Wi-Fi: 802.11b/g/n/e/i Bluetooth: Bluetooth standard 4.2BR/EDR and BLE Support interface (2Mbps): UART, SPI, I2C, PWM Support TF card: maximum support 4G IO port: 9 Serial port rate: Default 115200 bps Spectrum range: 2400~2483.5MHz Antenna shape: Built-in PCB antenna, 2dBi gain Image output format: PEG (only 2640 compatible), BMP, GRAYSCALE Transmission power: 802.11b: 17 2 dBm (at 11 Mbps ) 802.11g: 14 2 dBm (at 54 Mbps) 802.11n: 13 2 dBm (at MCS7) Receiving sensitivity: CCK, 1Mbps: -90dBm CCK, 11Mbps: -85dBm 6Mbps (1/2BPSK): -88dBm 54 Mbps (3/464-QAM): -70 dBm MCS7 (65 Mbps, 72.2 Mbps): -67 dBm Application scenarios: Transmission smart home appliances image feedback Wireless monitoring Smart farming Wireless QR recognition Positioning system signal wireless