user46773: I am trying to connect a USB Camera with my NodeMCU v0.9.

VCC  Red             +5V 
D-       White           Data    
D+       Green           Data 
GND  Black           Ground

I dismantled the USB-cable and connected the VCC cable to 5V and the black ground Cable to GND.
Now I have DATA + and DATA - cable from the USB, which I connected to D5/D6 GPIO of the NodeMCU. I can now read the digital signal of the camera.
But I am not quite sure how to process the data cables signal. I am not familiar with the USB Data + / - cable concept. 
Any ideas on how I can process the video image ?

user4143: You can't. It's as simple as that. To do it you require:

An MCU or MPU with a USB Host or OTG module built in.
Drivers for that module to enumerate the device
Drivers for the specific device you are connecting
Software to deal with the data provided by the device.

The ESP8266 has none of those. 
Sounds to me like you want a Raspberry Pi.

46773: <p>I am trying to connect a USB Camera with my NodeMCU v0.9.</p>

<ul>
<li>VCC  Red             +5V </li>
<li>D-       White           Data    </li>
<li>D+       Green           Data </li>
<li>GND  Black           Ground</li>
</ul>

<p>I dismantled the USB-cable and connected the VCC cable to 5V and the black ground Cable to GND.
Now I have DATA + and DATA - cable from the USB, which I connected to D5/D6 GPIO of the NodeMCU. I can now read the digital signal of the camera.</p>

<p>But I am not quite sure how to process the data cables signal. I am not familiar with the USB Data + / - cable concept. </p>

<p>Any ideas on how I can process the video image ?</p>
 4143: <p>You can't. It's as simple as that. To do it you require:</p>

<ol>
<li>An MCU or MPU with a USB Host or OTG module built in.</li>
<li>Drivers for that module to enumerate the device</li>
<li>Drivers for the specific device you are connecting</li>
<li>Software to deal with the data provided by the device.</li>
</ol>

<p>The ESP8266 has none of those. </p>

<p>Sounds to me like you want a Raspberry Pi.</p>
