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How to Deploy a LoRa®-based Network for your IoT Application

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White Paper — How to Deploy a LoRa®-based Network for your IoT Application Page 9 of 10 ● Ambient Light ● GPS The following is a sample sensor node payload that includes data from all of the above sensors: T28.6;H31.9;X-121.980020;Y37.396648;Z3.9M;S3;D50.0;Q697;A82;#MNPAHSEA The payload follows a scheme of tokens separated by semicolons, where each token represents a sensor value. The type of sensor value represented depends upon the first character of the token. The following shows the possible first characters for a token: ● T: Temperature ● H: Humidity ● X: Longitude ● Y: Latitude ● Z: Altitude ● S: GPS Satellites Locked ● D: Horizontal Dilution ● Q: Air Quality ● A: Ambient Light ● #: Unique ID Hash The Gateway Nodes Gateway nodes operate as the relay between sensor nodes and the Cloud. In the default Dots on a Map solution firmware, the RX65N MCU connects to the configured WiFi access point via the GT202 WiFi chip. It then establishes a secure MQTT connection to the Sandbox MQTT Broker. The gateway then listens for any sensor node payloads and immediately forwards them to the Cloud. Conversely, the gateway can also listen to messages from the Cloud to relay to sensor nodes over the same secure MQTT connection. The RX65N was chosen due to its higher performance and operating frequency while still leveraging the power efficiency of the RXv2 CPU core. As the gateway is responsible for the more processing intensive management of the secure TCP connection to the Cloud

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