Gas fee notification method based on compound internet of things (iot) and iot system

An Internet of Things (IoT) system, wherein the IoT system comprises a user platform, a plurality of service sub-platforms, a management platform, a sensor network platform and a plurality of object sub-platforms;

• the plurality of object sub-platforms are communicatively connected with the management platform via the sensor network platform;
• the management platform is communicatively connected with the plurality of service sub-platforms;
• the plurality of service sub-platforms are communicatively connected with the user platform;
• and each of the object sub-platforms comprises a gas meter;
• the management platform is configured to capture a latest tiered pricing policy from the plurality of service sub-platforms at a preset time interval, obtain a pricing rule according to the captured tiered pricing policy, and send the pricing rule to each of the gas meters via the sensor network platform;
• each of the gas meters is configured to judge whether or not a tier where a gas consumption amount of a user is located changes according to the read gas data and received pricing rule;
• when a tier where a gas consumption amount of a user is located changes, a gas meter sends a change signal to the management platform via the sensor network platform, wherein the change signal comprises gas data read by the gas meter;
• and
• the management platform sends, in response to the change signal, tiered pricing change information to the user platform via at least one of the plurality of service sub-platforms.