Modbus and MQTT solve the same problem from opposite ends. Modbus reads and writes numbers in a device. MQTT moves messages between systems. Put them together and you can take a register sitting inside a serial meter and land its value in a cloud database a continent away. But the two don’t connect on their own — they… Read More: Modbus to MQTT: How the Gateway Bridge Works »
MQTT is deliberately unopinionated about what your payloads contain, how you structure your topics, or how devices announce themselves to the network. That flexibility is a big part of why MQTT is popular. It is also the reason MQTT alone is not enough for industrial IoT, where two vendors’ devices need to interoperate on the same broker, where… Read More: What Is Sparkplug B? A Complete Guide to MQTT for… »
If you write Python and you need to move small messages between devices or services, MQTT is usually the right fit. It is a publish/subscribe protocol: a client sends a message to a topic, a broker holds the connections, and every client subscribed to that topic gets a copy. Publishers and subscribers never talk to each other directly.… Read More: Python MQTT: Complete Guide to paho-mqtt 2.x »
XON and XOFF are two control characters that let a serial receiver tell a sender to pause and resume. That’s the whole idea behind software flow control. No handshake wires, no dedicated signals — just two bytes sent back up the same link the data travels on. When a device can’t keep up, it sends XOFF and the… Read More: XON and XOFF: Software Flow Control Explained »
A null modem cable connects two DTE devices directly — two PCs, a PC and a controller console port, two pieces of test gear — with no modem in between. The whole job lives in the wiring. Transmit on one end has to reach receive on the other, and depending on the device, a few control lines have… Read More: Null Modem Cable Pinout: DB9 & DB25 Wiring Reference »
AMQP 0.9.1 is a message-oriented protocol that defines both a wire-level exchange format and a specific server model with exchanges, queues, bindings, and routing rules. It is best known as the native protocol of RabbitMQ, which is the most widely-deployed open source message broker in the world. Despite being called “legacy” in some OASIS documentation, AMQP 0.9.1 remains… Read More: What Is AMQP 0.9.1? A Complete Guide to the Protocol »
AMQP is a wire-level messaging protocol standardized by OASIS and adopted as an ISO/IEC standard, designed for reliable, interoperable messaging between applications and messaging systems. Unlike protocols that assume a particular server model, AMQP 1.0 defines only the protocol between peers: what a message looks like on the wire, how it is transferred, and how delivery is negotiated.… Read More: What Is AMQP 1.0? A Complete Guide to the Protocol »
If you are picking a messaging protocol for a new system, MQTT and AMQP are two of the most commonly-considered candidates. Both are mature, both have large ecosystems, and both are used in production at very large scale. But they were designed for different problems, and the comparison is more nuanced than most articles suggest — because AMQP… Read More: MQTT vs AMQP: A Complete Comparison »
If you are building something that needs to move data between clients and servers in real time — device telemetry, live dashboards, push notifications, chat, multiplayer state — you have several protocols to choose from, and HTTP and MQTT are two of the most common. On paper they look like alternatives; in practice they solve different problems well,… Read More: HTTP vs MQTT: Which to Use for Real-Time Messaging »
If you have decided that MQTT is the right protocol for your project and now need to pick a broker to run it on, the good news is that the most widely-used options are open source. The bad news is that “open source” hides some important differences: license type, what “free” actually covers, what you get in the… Read More: Open Source MQTT Broker: Mosquitto vs EMQX vs HiveMQ CE… »