ZeroIoT 1.2.0

ZeroIoT: Industrial Protocol Connectors for .NET

ZeroIoT is a high-throughput, pure C# industrial protocol connector library for .NET with zero external dependencies. It provides zero-allocation memory pipeline decoders, binary encoders, and network clients for industrial edge computing, PLC integration, and SCADA telemetry.

Key Features

• MQTT Exactly-Once QoS 2 & mTLS: Ultra-lightweight asynchronous client (MqttClient), zero-allocation packet encoder/decoder (MqttPacketEncoder, MqttPacketDecoder) with full 4-way QoS 2 handshake (PUBREC/PUBREL/PUBCOMP), in-flight tracking table (Qos2FlightTable), and X.509 mTLS mutual authentication (MqttClientOptions).
• OPC-UA Binary Protocol & TLS: Pure C# binary encoder/decoder (UaBinaryEncoder, UaBinaryDecoder), variant serialization (UaVariant), NodeId addressing, asynchronous TCP transport (UaTcpTransport), and X.509 TLS/mTLS encryption (OpcUaClientOptions).
• Sparkplug B: Industrial IoT edge payload codec (SparkplugCodec) and typed metric models (SparkplugMetric).
• Telemetry Bridges: Integrated streaming bridge to ZeroData DataFrame (IotDataFrameBridge) and ZeroStorage Gorilla TSDB sink (IotGorillaTsdbSink).
• Zero External Dependencies: 100% Pure C# across .NET 8, .NET Standard 2.0, and .NET Framework 4.6.2.

Usage Examples

1. MQTT Client with QoS 2 and X.509 mTLS

using System.Security.Cryptography.X509Certificates;
using ZeroIoT.Mqtt;

var options = new MqttClientOptions
{
    Host = "broker.hivemq.com",
    Port = 8883,
    UseTls = true,
    ClientCertificates = new X509CertificateCollection
    {
        new X509Certificate2("client.pfx", "password")
    }
};

using var client = new MqttClient(options);
await client.ConnectAsync();

// Publish with Exactly-Once QoS 2 semantics
byte[] payload = System.Text.Encoding.UTF8.GetBytes("{\"temperature\": 24.5}");
await client.PublishAsync("factory/line1/sensor", payload, MqttQoS.ExactlyOnce);

2. OPC-UA Client with X.509 TLS Security

using ZeroIoT.OpcUa;

var options = new OpcUaClientOptions
{
    Host = "192.168.1.100",
    Port = 4840,
    UseTls = true
};

using var client = new OpcUaClient(options);
await client.ConnectAsync();

var value = client.Read(new NodeId(2, "MotorSpeed"));

Multi-Targeting

• .NET 8.0+
• .NET Framework 4.6.2+
• .NET Standard 2.0

License

MIT License. Copyright © 2026 Phong Võ (kzxl). Part of the ZeroPlatform project.