GW01 MQTT Gateway
Industrial MQTT Gateway
MQTT protocol is event driven and has a Broker/Server to act as middlemen in all transactions. So the traditional read/write transaction doesn’t apply directly, but can briefly associated. For read operation of device, the site will have to publish its tag to the broker when its data is updated. And then the SCADA shall be configured as subscribe from the broker to get notified. Conversely for write operation, the SCADA shall publish any write request (from operator) to the broker, and then the gateway will subscribe to the broker to perform the write operation. So you can see that both pub and sub are involved in both read or write operation.
Hardware Spec
CPU | Model: Allwinner H3 Number of Cores: Quad-core |
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Frequency: 4 x Cortex-A7 Up to 1.2GHz | |
Memory | RAM: 512MB(16-bit)/1GB(32-bit) |
Storage | eMMC: NC(RAM: 512MB) /8GB (RAM: 1GB) |
MicroSD Slot: MicroSD x1 for external storage up to 128GB | |
Connectivity | Ethernet: 10/100M Ethernet x1 |
10/100/1000M Ethernet x1 | |
WiFi: based on AP6212 Module, 802.11b/g/n, with SMA antenna interface | |
Bluetooth: 4.0 dual-mode | |
USB | MicroUSB x1: MicroUSB 2.0, OTG & Power In |
USB Host: 2.0 Type-A x2 | |
LED | PWR/STAT LED(Red) x1 |
LED(Green) x2 | |
Others | Button: User button x 1 |
RTC-BAT x1: Input Voltage 3.0~3.6V | |
Working Temperature: -20℃ to 70°C | |
Power | MicroUSB DC 5V/2A |