从GPRS到LoRa,数字农业该如何逐步实现?

在数字农业领域,智能设备的通讯方式是如何从GPRS演变至LoRa的呢? 在上一篇文章中,我们谈到了数字农业不同通信方式的选择,最终我们选择了LoRa LPWAN。 从终端用户与公司的角度来讲,GPRS和LoRa之间的区别是什么呢?区别确实很大,因为没什么共同点。 从GPRS切换至LoRa意味着几乎所有产品线需重新开发,但更重要的是相关商业理念的转变。...

饱和水汽压差(VPD)对温室的影响

VPD 是一种检测作物生长压力的方法,特别对温室作物非常有用。VPD取决于空气温度及相对湿度,相对于只使用湿度,VPD的预测将更加有效,因为它能衡量空气所能容纳比目前更多蒸汽的能力,单位是KPa。 VPD 影响以下重要生长因子 植被气孔开关; CO2吸收率; 蒸腾作用; 根系养分吸收率。 植被承压。 如果 VPD过低,将会产生什么影响? 植被将不能蒸发水分,不能将矿物质输送至植被细胞; 如果VPD极低,水将凝结在树叶、树干及水果上,就容易滋生病虫害; 当植被不能蒸发水分,植被细胞内过度承压就会导致果实崩裂; 如果...

Reactive Programming

By Vitaly Ignatovich Original article is available at AgrioCom Website   Reactive programming is counter intuitive at first, like many other advanced patterns. In fact, it is most natural way of programming of event based applications. Every UI application...

Node JS vs All

Node JS first appeared in 2010 and since that has been rocketing in the sky of web development. It has broken all previous concepts and beliefs. It was like a small DOS diskette of young Bill Gates that pushed huge players of operating systems out of the personal...

LoRa and NB-IoT For Digital Agriculture

In agriculture, most of people understand IoT as some measurement tools that send data to web site. For example a personal weather station measures temperature, humidity, wind, soil moisture and sends all these data to a web server. Different applications running on...

HappyIn Greenhouse

1. Making sense of sensors data in greenhouseNumerous sensors and data loggers for greenhouse are available on market. Almost every parameter can be measured indoor and outdoor. Data is transferred to a web server or customers computer. The customer needs to decide...