Similar devices like the monster 10-30KW Inverters used in escalators, cranes, etc can be monitored safely from the cloud this way.Īs usual I used a low-cost (RM3.38) Arduino RS-485 to serial TTL module. It is low-cost, low-power and the WiFi module allows for a much safer non-galvanic, isolated data connection. The ESP8266 is incredibly tempting as such an IoT gateway. The Schneider PM1200 3-phase Power Meter has an RS-485 interface and would make a great IoT device. These industrial remote devices are often easily converted to IoT devices using for example, an IoT Gateway that also has RS-485 interfaces. Many remote devices, especially for industrial use come with the RS-485 serial interface and use the Modbus protocol. Clockwise from top: USB 3.0 powered hub, RS-485 USB dongle, Arduino RS-485 to TTL module and NodeMCU ESP-12E ESP8266
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