# Simple Arduino-based USB VID & PID tester ## Let's do this thing Danger: This older guide uses an Arduino board no longer in production. It is suggested you follow the modern guide [HID Reporter](https://learn.adafruit.com/hid-reporter) for building new projects. ![](https://cdn-learn.adafruit.com/assets/assets/000/027/386/medium800/projects_vidpid.jpg?1440522558) This is a project we use here at adafruit to check incoming goods as well as QC products out of manufacturing. If you have a USB device, the chip inside has a unique VID (vendor ID) and PID (product ID). For non-programmable parts, this pair is 'fixed' by the chipset itself. For programmable parts, like a microcontroller, the VID/PID is programmed in. Basically, you can use it to check chipsets and/or whether your Flora, say, has the right bootloader installed. This is something we have to check a few times a day, so we made  stand-alone tester! # Ingredients - [You'll need an Arduino with a USB host shield, I just used an Arduino ADK.](https://www.adafruit.com/product/563) ![](https://cdn-learn.adafruit.com/assets/assets/000/027/381/medium800/projects_x563-00.jpg.pagespeed.ic.ApkGws5akh.jpg?1440522349) You'll also want some sort of display, [such as a plain](https://www.adafruit.com/product/772) or [RGB 16x2 LCD shield](https://www.adafruit.com/products/716) kit. Be sure to follow the product tutorial to assemble ![](https://cdn-learn.adafruit.com/assets/assets/000/027/382/medium800/projects_716-08.jpg?1440522370) # Put it together, add code! OK not a lot going on here, put the LCD shield on top, install the Arduino library, upload the shield demo code & adjust the contrast potentiometer so you know it works. Then upload this code: ```auto // include the library code: #include #include #include #include #include #include #include #include #include #include USB Usb; Adafruit_RGBLCDShield lcd = Adafruit_RGBLCDShield(); void setup () { Serial.begin(9600); /* Initialize serial for status msgs */ Serial.println(F("\nVID PID tester")); lcd.begin(16, 2); lcd.setBacklight(0x7); lcd.print("USB VID/PID Test"); lcd.setCursor(0,1); lcd.print("Waiting for USB"); } void loop (void) { // initialize USB Serial.println("USB Start"); if (Usb.Init() == -1) { Serial.println("OSC did not start."); while (1); } Serial.println("Waiting for connection..."); while (1) { Usb.Task(); if( Usb.getUsbTaskState() == USB_STATE_RUNNING ) break; } uint8_t rcode = 0; byte num_conf = 0; USB_DEVICE_DESCRIPTOR buf; rcode = Usb.getDevDescr(1, 0, 0x12, ( uint8_t *)&buf ); if( rcode ) { Serial.print("USB ERROR: "); Serial.println( rcode ); while (1); } Serial.print("VID: 0x"); Serial.print(buf.idVendor, HEX); Serial.print(" PID: 0x"); Serial.println(buf.idProduct, HEX); lcd.clear(); lcd.print("VID: "); lcd.print(buf.idVendor, HEX); lcd.setCursor(0,1); lcd.print("PID: "); lcd.print(buf.idProduct, HEX); Serial.println("***Done!***"); while (1); } ``` That's it! When the ADK is powered it will display: ![](https://cdn-learn.adafruit.com/assets/assets/000/027/384/medium800/projects_waiting.jpg?1440522476) Plug in something that will enumerate, into the USB port, and you'll see the HEX code for VID and PID ![](https://cdn-learn.adafruit.com/assets/assets/000/027/385/medium800/projects_vidpid.jpg?1440522511) ## Featured Products ### Arduino Mega R3 Android Accessory Development Kit (ADK) Board [Arduino Mega R3 Android Accessory Development Kit (ADK) Board](https://www.adafruit.com/product/563) Fast track your Android phone hardware development or just design cell-phone robots with the Arduino ADK! The Arduino ADK is a microcontroller board based on the powerful ATmega2560 ([datasheet](http://www.atmel.com/dyn/resources/prod_documents/doc2549.PDF)). It has a USB host... No Longer Stocked [Buy Now](https://www.adafruit.com/product/563) [Related Guides to the Product](https://learn.adafruit.com/products/563/guides) ### RGB LCD Shield Kit w/ 16x2 Character Display - Only 2 pins used! [RGB LCD Shield Kit w/ 16x2 Character Display - Only 2 pins used!](https://www.adafruit.com/product/714) This new Adafruit shield makes it easy to use a 16x2 Character LCD. We really like the RGB LCDs we stock in the shop both the [RGB negative](http://www.adafruit.com/products/399) and [RGB positive](http://www.adafruit.com/products/398). Unfortunately, these LCDs do... In Stock [Buy Now](https://www.adafruit.com/product/714) [Related Guides to the Product](https://learn.adafruit.com/products/714/guides) ### LCD Shield Kit w/ 16x2 Character Display - Only 2 pins used! [LCD Shield Kit w/ 16x2 Character Display - Only 2 pins used!](https://www.adafruit.com/product/772) This new Adafruit shield makes it easy to use a 16x2 Character LCD. We really like the [Blue & White 16x2 LCDs we stock in the shop](http://www.adafruit.com/products/181). Unfortunately, these LCDs do require quite a few digital pins, 6 to control the LCD and then another pin to... In Stock [Buy Now](https://www.adafruit.com/product/772) [Related Guides to the Product](https://learn.adafruit.com/products/772/guides) ### RGB LCD Shield Kit w/ 16x2 Character Display - Only 2 pins used! [RGB LCD Shield Kit w/ 16x2 Character Display - Only 2 pins used!](https://www.adafruit.com/product/716) This new Adafruit shield makes it easy to use a 16x2 Character LCD. We really like the RGB LCDs we stock in the shop both the [RGB negative](http://www.adafruit.com/products/399) and [RGB positive](http://www.adafruit.com/products/398). Unfortunately, these LCDs do... In Stock [Buy Now](https://www.adafruit.com/product/716) [Related Guides to the Product](https://learn.adafruit.com/products/716/guides) ### Adafruit I2C Controlled + Keypad Shield Kit for 16x2 LCD [Adafruit I2C Controlled + Keypad Shield Kit for 16x2 LCD](https://www.adafruit.com/product/715) We really like the range of LCDs we stock in the shop, such as our classic [blue & white](http://www.adafruit.com/products/181) and the fancy [RGB negative](http://www.adafruit.com/products/399) and [RGB positive](http://www.adafruit.com/products/398).... In Stock [Buy Now](https://www.adafruit.com/product/715) [Related Guides to the Product](https://learn.adafruit.com/products/715/guides) ## Related Guides - [RGB LCD Shield](https://learn.adafruit.com/rgb-lcd-shield.md) - [Sous-vide controller powered by Arduino - The SousViduino!](https://learn.adafruit.com/sous-vide-powered-by-arduino-the-sous-viduino.md) - [Arduino "Hunt The Wumpus"](https://learn.adafruit.com/arduino-hunt-the-wumpus.md) - [Adafruit Capacitive Touch Sensor Breakouts](https://learn.adafruit.com/adafruit-capacitive-touch-sensor-breakouts.md) - [Trinket RGB Shield Clock](https://learn.adafruit.com/trinket-rgb-shield-clock.md) - [Adafruit 555 PWM Output STEMMA](https://learn.adafruit.com/adafruit-555-pwm-output-stemma.md) - [Ninja Timer: Giant 7-Segment Display](https://learn.adafruit.com/ninja-timer-giant-7-segment-display.md) - [Adabox 001](https://learn.adafruit.com/adabox001.md) - [Water Drip Dress with Oozemaster 3000](https://learn.adafruit.com/water-drip-dress-with-oozemaster-3000.md) - [Adafruit RP2040 CAN Bus Feather](https://learn.adafruit.com/adafruit-rp2040-can-bus-feather.md) - [14-Segment Alpha-numeric LED FeatherWing](https://learn.adafruit.com/14-segment-alpha-numeric-led-featherwing.md) - [Feather RP2040 DVI Video Synth](https://learn.adafruit.com/feather-rp2040-dvi-video-synth.md) - [Accessing and Using Adafruit PCB Design Files](https://learn.adafruit.com/accessing-and-using-adafruit-pcb-design-files.md) - [Adafruit IoT Button with NeoPixel BFF](https://learn.adafruit.com/adafruit-iot-button-with-neopixel-bff.md) - [Adafruit MCP3421 18-Bit ADC](https://learn.adafruit.com/adafruit-mcp3421-18-bit-adc.md)