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The project demonstrates how an IoT device (Ameba RTL8195) is applied in real-life scenarios. If you have watched previous demo videos, you should have no problem understanding how an LCD display, a DHT Temperature Humidity sensor and our Ameba RTL8195. It can be put together to form a fully functional smart weather station. Simply follow the instructions in our examples as follows to DIY your own weather station, 1. LCD 24H Clock https://www.electronics-lab.com/community/index.php?/topic/47704-realtek-ameba-rtl8195-lcd-24h-clock/ 2. MQTT https://www.electronics-lab.com/community/index.php?/topic/47715-realtek-ameba-rtl8195-mqtt-demo/ 3. DHT+MQTT https://www.electronics-lab.com/community/index.php?/topic/47735-realtek-ameba-rtl8195-iot-system-with-dht-mqtt/ The key to integrate these 3 examples successfully is to make sure that you have set up your MQTT server correctly and note that here we are using a different set of MQTT topics, namely “dht_data” and “dht_status”. Also, when connect DHT sensor, D13 pin is used as data input pin. GitHub page https://github.com/Realtek-AmebaApp/Ameba_Examples/tree/master/RTL8195AM/004_WEATHER_STATION Official pages https://www.amebaiot.com.cn/en/ https://www.amebaiot.com/en/ Facebook pages https://www.facebook.com/groups/AmebaIoT/ BiliBili channel https://space.bilibili.com/45777743
Temperature and humidity are 2 of the most important factors affecting people’s comfort level in an enclosed space. The DHT humidity and temperature sensor can read the ambient temperature and humidity every 2-3 seconds, and then pass the data to Ameba who will forward them to the server using MQTT protocol. Whoever “subscribing” to the right topic gets the data almost instantaneously. Users can then adjust the aircon mode or temperature according to the readings received. An android phone was used as an MQTT client and the Ameba RTL8195 Dev. Board acted as another MQTT client communicating with the android phone. Both clients have to connect to the same MQTT server before proceeding to the next step. The DHT sensor updates its data every 10 seconds to stay as accurate as possible. Once sensor data is received, Ameba then “publishes” the data to the MQTT server where all clients “subscribing” to the right topic gets the data displayed on the console. GitHub page https://github.com/Realtek-AmebaApp/Ameba_Examples/tree/master/RTL8195AM/003_DHT_MQTT Official pages https://www.amebaiot.com.cn/en/ https://www.amebaiot.com/en/ Facebook pages https://www.facebook.com/groups/AmebaIoT/ https://www.facebook.com/groups/AmebaIoTWW/ BiliBili channel https://space.bilibili.com/45777743