In a single poultry house, the exhaust fans, feeders, manure removal system, and lighting each come with their own controller. When temperatures climb, someone walks the house and switches the fans on. Feeding runs on a timer. Manure removal and lighting operate independently. Data ends up scattered across several small systems, and what management sees is never the whole picture — adjustments lag behind, and energy consumption stays high. What purpose-built iot gateway devices do here is pull every device in the house into one point table and one data path, so that both sensing and control close the loop inside the house itself.
In the reference topology, the M300 sits exactly at that junction: the environmental controller, feeders, manure cleaning equipment, and lighting connect below it, and the aggregated data moves up to PUSR Cloud for visualization, alarming, and private deployment. A single unit handles 2000+ data collection points, so one gateway per house is usually sufficient.
Monitoring blind spots in a house are rarely caused by missing sensors. More often, there is no single point that gathers every sensor together. Temperature, humidity, ammonia, and CO₂ travel over RS485 with Modbus RTU. Cameras and PLCs come in over Ethernet. Cooling pads, fans, and lighting report state through DI/DO. The M300 collects from serial ports, Ethernet ports, and I/O at the same time, up to 2000 points, which is enough to cover an entire house with one unit.
Before deployment, list the equipment into a table by interface and protocol: how many serial ports, the four serial parameters (baud rate, data bits, parity, stop bits), and the Modbus station number; the IP address and port of each Ethernet device; and whether each I/O point is digital or analog. That table becomes the point table used in configuration. Miss one item, and a group of readings will be missing after commissioning.
Many designs place control logic in the cloud. That works while the network is healthy, but once the link starts to jitter, the response of the fans, feeders, and manure system falls behind. Livestock are sensitive to environmental change — a stretch of high temperature lasting ten-odd minutes can already cause losses.
The M300 supports Node-RED graphical programming, so threshold checks and interlock logic can run locally on the gateway. For example: when temperature exceeds a set value and stays there for a defined period, switch the fans on automatically; when ammonia climbs, trigger ventilation together with manure removal; when feeding time arrives, start the feeder and report the remaining count at the same time. The control loop stays inside the house and does not wait for cloud instructions. The network only carries results and alarms out.
It is normal for equipment from different batches and brands to speak different protocols. Some run Modbus RTU, some DL/T645, and some use proprietary PLC protocols. The conventional answer is to buy a pile of protocol converters and integrate device by device — a long retrofit cycle, and when something breaks, no one owns the problem.
The M300 supports Modbus RTU/TCP conversion, DL/T645, and common PLC protocols natively, so heterogeneous devices on serial and Ethernet ports connect directly. Its modular I/O also extends DI, DO, AI, and AO. When the point count grows, a new module slides onto the DIN rail — no need to replace the main unit.
Farms are usually built far from town. Fixed broadband is unreliable, and cellular signal quality varies. Once the network drops, data is lost, the monitoring record develops blank segments, and later reviews have nothing to work from.
The M300 buffers data locally during outages and resumes transmission afterward. While the network is up, reporting follows the configured cycle; when it goes down, readings are held locally and backfilled automatically once the link returns. The result is a continuous curve on the platform side, missing nothing because of a base station handover or a fiber cut. Uplink options include 4G/3G, Ethernet, and ADSL, and wired and cellular can back each other up.
For many small and mid-sized farms, the difficulty is not buying equipment. It is that adding a point or adjusting a control rule afterwards means waiting for the vendor to visit, which costs both time and labor.
The M300 handles basic configuration through a built-in web interface and edge logic through Node-RED. Once the point table is clear, in-house staff can add collection points, adjust thresholds, and modify interlock conditions on their own. Forgotten parameters are recoverable by holding the Reload key to restore factory defaults and re-importing the saved configuration. Day to day, PUSR Cloud allows changing parameters, rebooting, and upgrading firmware remotely, cutting down site visits.
Inventory.Build a table of the interfaces, protocols, and points for the fans, feeders, manure system, lighting, and environmental sensors. The four serial parameters and Modbus station numbers must be copied out in full.
Configure.Map serial ports, Ethernet ports, and I/O in the M300 web interface, then draw the interlock logic in Node-RED. Collect first without reporting, and verify readings point by point.
Connect.Choose 4G or wired according to site conditions, set the reporting cycle and alarm conditions, and connect to PUSR Cloud or a private platform.
Drill.Disconnect the network deliberately for a period and check whether local control keeps running and whether data backfills after recovery. This step surfaces most hidden problems early.
The core of house monitoring is not adding more sensors. It is closing the loop of sensing, control, connectivity, and operations on a single industrial gateway. When comparing iot gateway devices for this kind of work, four things decide whether a house runs smoothly: enough collection points to remove blind spots, local edge computing so control does not wait on the cloud, protocol coverage that reaches mixed equipment, and buffered retransmission that keeps the record intact through outages. The M300 delivers all four in one unit.
1. How many gateways does one house need?One M300 is usually enough. A single unit handles 2000+ collection points and collects from serial ports, Ethernet ports, and I/O in parallel, covering the fans, feeders, manure system, lighting, and environmental sensors of a typical house. Only very large sites or multi-house distributed setups call for more than one.
2. If the network drops, will the fans and feeders still run automatically?Yes. Control logic is configured locally on the M300. After a disconnection, the gateway keeps executing interlocks against thresholds — starting fans at high temperature, feeding on schedule. The network handles reporting and remote management only; it does not participate in real-time control.
3. Equipment on site comes from mixed brands with different protocols. Can it connect directly?Yes. The M300 supports Modbus RTU/TCP, DL/T645, and common PLC protocols natively. Heterogeneous devices connect directly over serial or Ethernet ports, with no need to buy separate protocol converters. One of the practical advantages of purpose-built iot gateway devices is exactly this: protocol handling sits on the gateway instead of in a stack of external converters.
4. Will data be lost during a network outage?No. The M300 buffers locally and resumes transmission. Readings are held on the device while the link is down and backfilled automatically once it returns, so the time-series curve on the platform stays continuous.
5. Can operators change control logic without writing code?Yes. The M300 supports Node-RED graphical programming, where thresholds, interlocks, and alarms are configured by dragging and dropping nodes — no coding required. Basic parameters are changed through the built-in web interface.
6. What if the target platform is not PUSR Cloud?That works. The M300 supports standard MQTT and TCP and connects to PUSR Cloud, Alibaba Cloud, AWS, ThingsBoard, Azure, and other mainstream platforms, with private deployment also supported.
7. What happens when new points are added later?The M300 supports modular I/O expansion with DI, DO, AI, and AO modules. On the software side, points are added directly in the web interface and Node-RED — the main unit does not need replacing.
8. Is this gateway usable in farming scenarios other than poultry houses?Yes. The same pattern — collection, local edge control, and buffered retransmission — applies to pig barns, cattle sheds, and aquaculture, wherever environmental regulation and automated equipment are involved. The deciding factor is whether the interfaces and protocols match.
