Hardware and devices

Connect to a Bluetooth Low Energy device and walk through its full GATT tree: every service, its characteristics with the operations they support, the descriptors and the already decoded values, such as battery level, manufacturer, model and firmware versions, with the option to follow notifying characteristics live.

See processor cores, memory, screen resolution and density, video card model, battery status, network connection, and what hardware APIs your browser supports, all calculated on your computer.

See your phone's accelerometer, gyroscope and orientation live, use the spirit level and compass, check the ambient light and test the vibration motor with different patterns.

Scan NFC tags to see their serial number and every decoded NDEF record, write text, URLs, vCard contacts, phone numbers or external types, and lock the tag permanently when you are done.

Press each key and verify it on a virtual keyboard that marks the ones tested, consult the key, code and keyCode of each event, and discover how many simultaneous keys your device recognizes.

Measure the microphone level in decibels with its waveform and spectrum, record a test to hear how you are heard, and test the speakers with tones per channel and a sweep of the entire audible range.

Test the five buttons and the wheel, measure the polling rate in hertz, detect the involuntary double clicks produced by a worn microswitch, and follow the pointer stroke to see if it jumps.

Choose your camera and resolution, watch the live preview, check the actual frames per second, check the device's claimed capabilities, and take a screenshot to review the image.

Paste the ID of a PCI or PCI Express board as displayed by Windows Device Manager or the lspci command, include the subsystem if you know it to distinguish the exact model, and get the chip manufacturer and board name based on the pci.ids catalog.

I chose the RAID level, the number of disks and their capacity to know how much space is really left for data, how much redundancy takes and how many disks can fail without losing information, with the estimated performance, rebuild time and comparison of all levels with the same hardware.

I ran through fourteen full-screen patterns to find dead pixels, specks, banding, and trails, measured the monitor's actual refresh rate, and checked how many fingers the touchscreen recognizes.

Add up the consumption of each component of the equipment to know which source you need and how much is taken from the outlet according to the 80 PLUS certification, and calculate the real autonomy of a UPS with its battery bank, with Peukert correction and the capacity necessary for the backup you want.

Plug in a USB device and see everything it declares: its Vendor ID and Product ID, the manufacturer, the product, the serial number and the full tree of configurations, interfaces and endpoints, with the class, subclass and protocol translated into the official USB-IF name and the transfer type of every endpoint.

Paste a USB device ID as displayed by Windows Device Manager or the lsusb command, or type just the four-digit Vendor ID, and get the manufacturer and product name based on the Linux USB project's usb.ids catalog.