Turn Your Smartphone Into a Precision Industrial I/O Lab.
Inspecto (Hardware Version V3) is a pocket-sized, dual-channel universal analog and digital test instrument powered directly over USB-C. Measure up to 60V DC, source precision 0–22V DC analog signals, and actuate 22V industrial logic in real time.
TLP172GM), self-resetting polymeric fuses (PPTC), and transient clamping shields ensure industrial field voltages never reach your phone's USB-C port.
Uncompromising Protection for Your Smartphone & Board
Connecting industrial 24V–60V PLC lines to a smartphone requires military-grade electrical protection. Inspecto V3 features a 5-stage hardware defense matrix that keeps your phone 100% isolated from field faults, miswiring, and short circuits.
Optical Solid-State Relay Isolation
High-voltage Toshiba TLP172GM photorelays physically and optically disconnect the output amplifier whenever a channel is in Analog Input mode, using an infrared LED-to-MOSFET light barrier so external 60V signals can never back-drive the board.
TLP172GM • 350V Breakdown Rating663 kΩ High-Impedance Input Shield
Each Analog Input channel passes through a precision 630 kΩ + 33 kΩ attenuation network and a 22 kΩ current-limiting buffer. Even at 60V DC, input current is restricted to microamps—completely impossible to surge into your phone's USB-C port.
< 90 µA Max Input Current @ 60VSelf-Resetting PPTC Fuses & Zener Clamps
If a technician accidentally shorts +24V or reverse-wired -24V directly into an active output terminal, the onboard PPTC polymeric fuse trips to high impedance within milliseconds while Zener clamping safely absorbs the transient. Once unplugged, it heals itself automatically.
Auto-Healing Overcurrent DefenseIndefinite Short-Circuit & USB Power Guard
Dual-loop op-amp feedback with a 47 Ω isolation resistor caps continuous short-circuit current at a gentle ~30 mA. Your smartphone battery stays cool, USB-C current limits are never exceeded, and both relays automatically open on boot, reset, or firmware update.
Safe for All Android Phones & FoldablesDual-Channel Universal I/O Specifications
Both channels operate simultaneously and independently in any combination—with hardware-enforced mutual exclusion per channel so input and output stages never conflict.
ANALOG INPUT (AI MODE) MODE 0
- Measurement Range170 mV – 60.00 V DC
- ADC Resolution12-Bit Hardware Calibrated
- Input Impedance663 kΩ (630k + 33k Divider)
- Photorelay StateOPEN (Physically Isolated)
- Noise Floor Deadband< 100 mV Auto-Zero
ANALOG OUTPUT (AO MODE) MODE 1
- Output Voltage Range0.00 V – 22.00 V DC
- DAC Resolution12-Bit (4096 Steps)
- Amplifier Stage8.5× Gain w/ Post-PPTC Feedback
- Closed-Loop ReadbackReal-Time Terminal ADC Sense
- Short-Circuit Limit~30 mA Continuous Safe
DIGITAL OUTPUT & SYSTEM MODE 2 + MCU
- Digital Logic LevelsLOW: 0.0V | HIGH: 22.0V
- MicrocontrollerSTM32F072 (ARM Cortex-M0 + FreeRTOS)
- USB InterfaceUSB-C Full-Speed CDC + ROM DFU
- Unique Board IdentityNon-Volatile Option Bytes (PID)
- Firmware UpdatesDirect In-App USB-C Programming
Direct Smartphone-to-MCU Firmware Updates Over USB-C
No ST-Link or PC required. When you plug your Inspecto board into your phone, the app checks the board's live firmware version and updates the STM32 microcontroller directly over your USB-C cable.
Board-First Version Check
The app reads your connected board's live firmware version and unique Option-Byte hardware ID before checking the cloud for newer releases.
Safe Software DFU Jump
Upon confirmation, Inspecto opens both solid-state relays, zeroes its DACs, and jumps cleanly into the unbrickable STM32 System ROM USB DFU Bootloader.
Verified 2KB Block Programming
The app validates the ARM Cortex-M0 vector table, flashes the binary with live 0–100% progress, performs read-back verification, and preserves your board's unique USB ID.
Instant Auto-Reconnect
In seconds, the MCU reboots into the new firmware and reconnects to your live telemetry dashboard automatically.
Download Inspecto App & User Manual
Click the buttons below on your phone, or scan the permanent QR codes directly with your smartphone camera.
Inspecto Android App
Full dual-channel cockpit with live 60fps oscilloscope waveforms, AI/AO/DO mode switching, dark/light themes, and automatic USB-C MCU firmware updates.
Inspecto V3 User Manual
Complete illustrated quick-start guide featuring terminal pinouts, 0.17V–60V measurement wiring, 0–22V load driving diagrams, LED blink codes, and safety specs.
How to Get Started with Inspecto
Install the App
Download and open Inspecto.apk on your Android phone, tablet, or foldable device and accept the initial permissions prompt.
Plug into USB-C
Connect your Inspecto V3 board to your phone using any data-capable USB-C cable. The onboard LED will blink slowly (safe Analog Input mode).
Auto-Connect
Tap "OK" on the Android USB permission prompt. The app immediately locks onto your board's unique ID and streams live voltage telemetry.
Measure or Drive
Select AI (0.17–60V), AO (0–22V), or DO (0V/22V) independently on Channel 1 and Channel 2.