Osprio OSDP Tools, Hardware & Consulting

What is OSDP

Modern access control,
on an open standard

OSDP — the Open Supervised Device Protocol — is the IEC 60839-11-5 standard for how access control panels talk to the readers, keypads, and controllers in the field. It is secure, bidirectional, and vendor-neutral: one open protocol for the whole bus.

For nearly forty years that bus spoke Wiegand — a one-way, unencrypted signaling scheme still wired into most card readers in service today. Its weaknesses are now well understood, and as encryption and line supervision become baseline security expectations, standards bodies and government procurement increasingly specify OSDP for new and upgraded installations. The changeover is gradual, but the direction is set.

Capability	Legacy Wiegandincumbent · since the 1980s	OSDPtoday's standard
Communication	One-way — reader to panel only	Bidirectional command and reply
Data security	Unencrypted — credentials sent in the clear	AES-128 Secure Channel encryption
Line supervision	Unsupervised — a cut wire goes unnoticed	Continuously supervised — tamper and line faults detected
Bus topology	Point-to-point — one device per home run	RS-485 multidrop — up to 126 devices on one bus
Standardization	Proprietary, ~40-year-old wiring scheme	Open IEC 60839-11-5 standard — interoperable across vendors

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Capabilities

What OSDP brings to the bus

Secure Channel

AES-128 encrypted, authenticated sessions keyed per device (SCBK) — credentials never travel in the clear.

RS-485 multidrop

A single twisted pair carries up to 126 peripheral devices over long cable runs, replacing dedicated home runs.

Supervision

The panel polls continuously, so tamper, line cuts, and lost devices surface immediately instead of going silent.

CP & PD roles

A Control Panel drives the bus while Peripheral Devices reply — a clear, deterministic communication model.

PD capabilities

Every peripheral advertises what it supports — readers, inputs, outputs, LEDs, and secure channel — so a panel can discover and adapt to each device.

File transfer support

Stream firmware images and other payloads to a device over the bus — the foundation for over-the-air updates in the field.

Open & interoperable

Published by SIA as IEC 60839-11-5, so readers and panels from different vendors work together on one bus.

OSDP is powerful.
Osprio makes it visible, testable, certifiable, and deployable.

Capture the bus, emulate any device, certify against the spec, and provision in the field — each Osprio workspace turns one hard part of the protocol into a repeatable workflow.

01

Visible

Capture live OSDP traffic and decode every command and reply as it happens. The Capture workspace shows you exactly what's on the wire.

02

Testable

Stand in as a CP or PD in software, automate card swipes, and inject faults. The Emulator workspace validates edge cases before hardware exists.

03

Certifiable

Drive a structured conformance plan against a PD. The Conformance workspace produces a detailed, repeatable compliance report.

04

Deployable

Commission PDs on site — set address and baud, then key the secure channel. The Provisioner workspace gets devices live in the field.

Products

The Osprio product line

Professional OSDP workflows, from bench to field

Two hardware platforms sit underneath one universal software product, with workspaces nested inside that software layer.

Hardware

OsprioMiniRoad Testing

The compact OSDP bench companion

Compact host-powered hardware for running one Osprio View workspace at a time over USB-C and RS-485.

One workspaceUSB-CRS-485Field upgrades

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OsprioProActive Development

The field-carry OSDP workstation

Battery-backed field hardware for running multiple Osprio View workspaces, offline jobs, Bluetooth sessions, and secure provisioning flows.

Multi-workspaceBluetoothOffline modeSecure element

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Weighing the options? Compare the hardware platforms →

Software

Osprio View - Capture WorkspaceLive

See the bus. Decode the truth

Watch live OSDP traffic on the wire and decode every command and reply. Reopen saved captures for offline review.

Live captureSecure channelOffline replay

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Osprio View - Emulator WorkspaceLive

Test the device you have against the device you need

Stand in as a CP or PD on the bus. Send commands and events from the UI and automate them with reusable action cards.

CP + PD rolesFault injectionScripted flows

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Osprio View - Provisioner WorkspaceLive

Secure-channel commissioning without the field pain

Commission PDs in the field: set address and baud, then key the SCBK in install mode — live one at a time or as a batch.

Address + baudSCBK keyingInstall mode

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Osprio View - Conformance WorkspaceComing Soon

Compliance claims become repeatable evidence

Drive a structured OSDP conformance plan against a PD. Take away a detailed, repeatable compliance report.

Semi-automatedCommand coverageCompliance report

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Weighing the options? Compare the software plans →

Open Source Core

Built on LibOSDP — the most popular OSDP implementation

Every Osprio product is built on top of LibOSDP, a battle-tested open-source library that handles the full SIA OSDP v2.2 protocol surface — secure channel, file transfer, multi-drop, and more.

Full CP and PD mode support
Secure channel with AES-128 and key management
OSDP file transfer (FT) for OTA firmware
Runs on Linux, RTOS, and bare-metal targets
Non-blocking, event-driven architecture

GitHub ↗libosdp guide ↗

osdp_cp_setup.c

#include <osdp.h>

osdp_pd_info_t pd_info[] = {
    { .address = 1, .baud_rate = 9600 }
};

int command_handler(void *data, int pd_idx,
                    struct osdp_cmd *cmd) {
    // react to PD commands here
    return 0;
}

int main() {
    osdp_t *ctx = osdp_cp_setup(1, pd_info);
    osdp_cp_set_command_callback(ctx, command_handler, NULL);
    while (1) {
        osdp_cp_refresh(ctx);
    }
}