bacbus vs Modbus 40001

BacBus puts a BACnet/IP and Modbus/TCP toolkit in your pocket. Whether you're commissioning a new install, troubleshooting a rooftop unit, or verifying a controller in the field, BacBus connects you to your building network in seconds — no laptop, no proprietary gateway, no clunky software. DISCOVER Scan your network and find BACnet/IP devices instantly. BacBus reads the objects other tools miss — where some scanners come back empty, BacBus pulls the full object list so you can see exactly what's on the wire. READ Poll live values from any point. Watch present-value, status flags, units, and object names update in real time. Read is always free. CONTROL (Pro) Write to points and command overrides right from your phone. Test a damper, force a setpoint, or verify a sequence on site — no truck roll back to the laptop. MODBUS/TCP Connect to any Modbus/TCP device, scan registers, and read or write coils and holding registers. Works with sparse and non-standard register maps. BUILT FOR THE FIELD • Fast, native interface that works on cellular or site Wi-Fi • No account required to start scanning and reading • Handles real-world devices from major manufacturers • Designed by a controls integrator, for controls integrators FREE TO START Scan and read as much as you want, free. Unlock point control (writes and overrides) with a single one-time purchase — no subscription. Download BacBus and turn your phone into the only field tool you'll reach for.

Modbus 40001 is a Modbus/TCP master & slave for testing and commissioning industrial equipment — PLCs, drives, meters, and controllers — from an iPhone or iPad. Enter a device's IP address and port, choose a function code, and continuously poll a block of coils or registers of any size. Values update live, changed cells flash as they move, and holding registers and coils can be written back with a tap. FEATURES:- • Function codes 01–04 — Coil Status, Input Status, Holding Register, Input Register • Any block size — set the start address and length, checked against the protocol limits for each function • Poll rates from 100 ms to 5 seconds • Value notations — unsigned and signed decimal, hex, binary, 32-bit long, Float32 and 64-bit double in both word orders • Character notations — ASCII in either byte order, plus a low-byte form, with a joined readout so device names and serial numbers read as text • Writes — tap a cell to send Preset Single Register (06) or Force Single Coil (05) • Multiple scan documents — save several register blocks per device and switch between them • Addressing toggle — 1-based (PLC style) or 0-based (raw protocol), so off-by-one confusion is a single tap away from being resolved • Traffic view — every frame in and out as bracketed hex, with capture and clear • Status strip — polls, valid responses, errors, success rate, latency, and last update time • Built-in demo device — try every screen without hardware on the bench • Designed for both orientations — iPad keeps a two-column layout, iPhone scrolls the whole page No accounts, no analytics, no advertising. Device addresses and scan settings are stored only on your device. Intended for general testing of the Modbus/TCP protocol. Not certified for safety-critical use.