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The DFRobot FireBeetle series comprises energy-efficient development modules specifically designed for the Internet of Things (IoT). One of these modules is the FireBeetle Covers-Camera & Audio Media Board, a versatile multimedia device for IoT applications. It offers various interfaces to connect components such as the NAU8822 CODEC IIS, OV7725 camera, SD card (SDIO), earphones, and microphone.
Additionally, this media board features a mini MIC input interface. The NAU8822 CODEC IIS is capable of driving both a 12W BTL loudspeaker at 8 and a 40mW earphone at 16ohm. It supports direct connections for easy integration. Furthermore, the NAU8822 supports DAC sound signal acquisition and a programmable microphone amplifier. This allows for audio recording when input voices are provided via the onboard MIC interface or an external microphone, with the ability to save the recordings to an SD card. Moreover, when connected to an OV7725 CAMERA, the board enables the functionality to capture photos.

With anyFireBeetle main boards(e.g.,ESP32 main board), the FireBeetle Covers-Camera & Audio Media Board could be an MP3, a recorder, or a camera. Once connected to the Internet, it could be an Internet radio or a cloud image recognition.NOTE:

This media board only supports theFireBeetle ESP32 main boardat present, as other main boards are not equipped with the IIS interface.
The flat ribbon cable of the camera is relatively easy to break; please be careful and light in connection. The camera shot must be opposite the SD card slot.
It does not support video shooting and transmission.

Specification:

Operating Voltage: 3.7V~5.5V (VCC)
Output Voltage: 3.3V
User-defined Button: tested by IO16(DI)
RESET x1
SD Card:Bus Interface: SDIO ProtocolDefault Transmission Rate: 10MHzMax. Transmission Rate: 20MHz
Camera OV7725: (data as below is just for reference; some functions could not be realized by ESP32 now).Photosensitive/Light-sensitive Array: 640x480Optical Size: 1/6″Angle of View: 25DegSCCB Standard InterfaceOutput Pixel Format: Raw RGBRGB(RGB4:2:2 ,RGB565/555/444)YCbCr (4:2:2)Image Size: VGA, QVGA, and CIF to 40x30VarioPixel SubsamplingAuto Image Control: auto exposure control (AEC), auto gain control (AGC), auto white balance (AWB), auto band filter, and auto black level (ABL) calibration.Image Quality Control: saturation, tone, gamma, clarity and anti-interferenceISP: noise reduction and defect calibrationLens Shading CorrectionAuto Saturation AdjustmentFrame SynchronizationFixed-focus
NAU8822:DAC:94dB SNR , -84db THDADC:90dB SNR , -80dB THDIntegrated BTL loudspeaker drive: 1W @ 8OhmIntegrated earphone drive: 40mW @ 16OhmIntegrated programmable microphone amplifierTypical Sampling Rate: 8KHz, 48KHz, 96KHz, 192KHzStandard Video Interface: PCM and I2S
MIC:Type: Electret CapacitorOutput: analogDirection: omnidirectionalFrequency Range: 100Hz~15KHzSensitivity: -43dB 5dB @ 94dB SPLSignal-to-noise Ratio: 58Db

Shipping List

FireBeetle Covers-Camera&Audio Media Board(V1.0) x1
OV7725 Camera x1
18pin-2.54mm Male Pin Header 2
18pin-2.54mm Female Pin Header 2