using MQTT protocol IoT with a Wemos as the gateway of HC-12 MHz radio long-range
is sent to the cloud. It was made by programming with Arduino IDE, PubSubClient, and DHT library. We can send the data from the gateway to the ThingsBoard cloud in real-time. The data can be visualized in ThingsBoard.
Arduino nano as an HC-12 transmitter sends to sensor data of DHT22 to the wemos IoT gateway. IoT Gateway collects all data which uses 433 MHz radio frequency. Then data from gateway are sent to thingsboard using MQTT.