RFID阅读器项目......拿2 [英] RFID reader project... Take 2
问题描述
在第一部分 [ ^ ]我问了一些过于模糊和笼统的问题...
现在我有更多的想法，所以更具体（但不是太具体）的问题...
现在我有几个（实际上我只建了一个，但那是不重要的）RFID阅读器模块......这些模块有RFID阅读器本身，连接到卡片大小的计算机（Arduino），可以通过WiFi连接到某个网络...
客户数据库可以通过网络服务访问并托管在野外......（我的意思是它不是网络的一部分）
那个盒子能够读取RFID标签并通过WiFi发送ID（带有一些额外的数据）......这就是问题...
我在这里看到两个选项
1. WiFi链接t o本地网络，并且没有通过该网络访问互联网。在这种情况下，我将放置配置为本地网络和互联网之间的网关的小型服务器...所有RFID阅读器盒将向该服务器报告，服务器将调用发送到托管的Web服务...
2. RFID盒子连接的网络可以通过自己的记录访问互联网，因此这些盒子可以直接调用托管的网络服务......
我的问题有两个方面：
1.性能/可靠性
2.安全性
我知道这是一个编码站点，但我编写实际代码没有问题......我需要的是你在WiFi网络领域的经验/知识。 ..
1。一根绳子有多长 - 可靠性？如果我们在现场或办公室里远程/外出谈话，你有240VAC（或等效）电源吗？
如果你是远程和稳定的WiFi&互联网连接将是困难的，但有移动/'Cell'覆盖你可以考虑为Arduino的GSM盾 - 你需要一个服务器的某个地方与GSM调制解调器连接到互联网，所以你可以推动来自那里的数据包
如果你需要建立一个WiFi链接，你有一个关闭但不够接近你可以使用Ubiquiti设备来扩展范围 - 室内或室外 - 价格合理且非常好
可靠性 - 您发送的流量是多少？我不经常想象小数据包 - 如果你没有使用交流电源，你必须考虑你的电池寿命
2.安全 - 很明显，很明显你有两个层 - 数据和传输 - 所以你可以加密数据并使用HTTP / S进行网络推送 - 我也担心保护HTTP / S连接的Web端免受DOS攻击
In the first part[^] I asked some too vague and general question...
Now I have more thoughts in place so some more concrete (but not too concrete) question...
Now I have several (actually I build only one, but that's unimportant) RFID reader modules...These modules have the RFID reader itself, hooked to a card-size computer (Arduino), which have WiFi connection to some network...
The customer database accessible via web-service and hosted somewhere in the wild... (I mean it is not part of that network by any means)
That box is able to read RFID tags and send the ID (with some additional data) over the WiFi to...and that's the question...
I see two options here
1. The WiFi links to a local network and there is no internet access via that network. In that case I will place small server that configured to be a gateway between the local network and the internet...All the RFID reader box will report to that server and the server will send the calls to the hosted web-service...
2. The network to which the RFID boxes linked has access to the internet by its own record, so the boxes can directly call the hosted web-service...
My question goes two way:
1. Performance/reliability
2. Security
I know that this is a coding site, but I had no problem to write the actual code...What I need is your experience/knowledge in the area of networking via WiFi...
1. how long is a piece of string - reliability ? are we talking remote/out in the field or in an office, do you have 240VAC (or equivalent) power ?
If you are 'remote' and stable WiFi & Internet connection is going to be difficult but there is mobile/'Cell' coverage you could think about a GSM Shield for the Arduino - you'd then need a server somewhere with a GSM Modem which is connected to the internet so you could push the data packets from there
If you need to set up a WiFi link and you've got one 'close but not close enough' you could use Ubiquiti equipment to extend the range - indoor or outdoor - its reasonably priced and very good
Reliability - how much traffic are you sending ? I would imagine small data packets infrequently - If you're not running on AC power you'd have to think about your battery life
2. Security - well, obviously you have two layers - the data and the transmission - so you could encrypt the data and use HTTP/S for the web push - I'd also be worried about protecting the Web end of the HTTP/S connection from DOS attacks
这篇关于RFID阅读器项目......拿2的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
