1. What is the LoRa environmental sensor
LoRa environmental sensors refer to LoRa nodes equipped with environmental sensors, such as temperature sensors, humidity sensors, barometric pressure, indoor air quality sensors, etc. However, unlike traditional environmental sensors, as shown in Figure 1, the LoRa environment The sensor sends the collected data to the LoRa gateway through the LoraWan/LinkWan protocol, and finally transmits it to the server.
Since the LoRa environmental sensor uses LoRa technology to send data, it also determines that its networking is simpler than traditional sensors. For example, suppose the application scenario is a smart farm. When the farm covers a large area, the transmission distance of LoRa technology in the urban area is several kilometers, and the transmission distance in the suburbs is more than ten kilometers, while traditional data transmission technologies such as Wifi only have a few. Ten meters, therefore, when networking, the number of LoRa gateways that play a role in data transfer can be relatively small, and if you use Wifi technology, you may have to configure hundreds of times more routers.
2. Power consumption of LoRa environmental sensors
The LoRa environmental sensor uses LoRa technology, so the power consumption is very small. Even if the individual develops the MCU on their own, they can obtain lower power consumption.
If you purchase low-power MCUs and sensors that have been designed by the manufacturer and provide optimized embedded software, the power consumption can be lower. For example, RAKwireless RAK7204 environmental sensor, in most application scenarios, a 3500mAH battery is no problem for more than 2 years of use, so it reduces the frequency and cost of battery replacement.
Moreover, the RAK7204 also supports battery power monitoring, which can report power regularly, support low battery alarms, and adopt a replaceable battery design to facilitate later operation and maintenance.
3. Personalized parameter setting of LoRa environmental sensor
LoRa environmental sensors support users to personalize parameter settings based on actual application needs.
For example, the RAK7204 software supports the configuration of the sensor sampling and sending interval, which is convenient for customers to set the sensor sampling frequency according to actual needs to extend battery life.
4. The size of the LoRa environmental sensor
LoRa environmental sensors can be very small.
As shown in Figure 2, RAK7204 adopts a highly integrated design, which integrates environmental sensors, LoRa transceiver modules, LoRa antennas and batteries in a 90*85*34mm box, which is convenient for hidden installation of sensors and integration with the surrounding decoration environment. . The outer shell adopts a hollow and transparent design, which is convenient for air flow and accurately detects environmental changes.
5. What is special about LoRa environmental sensors-the frequency band needs to be selected
When buying a LoRa environmental sensor, you need to pay special attention. A product often has different models to support different frequency bands. You need to select the LoRa environmental sensor according to the actual frequency band you use.
The above is an introduction to the LoRa environmental sensor, what is involved in the LoRa environmental sensor, power consumption, personalized parameter settings, volume, frequency band used, I hope that everyone will know this technology is helpful.
Document: https://doc.rakwireless.com/datasheet/rakproducts/rak7204-lora-environmental-sensor-datasheet
Original Post: https://zhuanlan.zhihu.com/p/139962414
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