產品說明2
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RS485 V2.1 Shield
Description: Our friends over at LinkSprite have made this nifty little RS485 Shield, now you will be able to have a communication port for your field bus directly connected to your Arduino! Even though the RS485 is sometimes thought as an “archaic” protocol, it will allow up to 32 devices to communicate through the same data line over a cable length of up to 4000ft with a maximum data rate of 10Mbit/s. Those aren’t bad numbers!
This version of the RS485 shield removes the optional DB9 connector bay and adds a second 2-pin screw terminal and the ability to choose two pins from your Arduino’s D0 to D7 as Software Serial Ports to communicate with the shield.
This shield does come without its headers separate so a small amount of soldering will be required before attaching it to your Arduino device.
Documents:
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介紹
RS485是現場總線的標準通信端口。Arduino的只有一個USB端口和一個TTL UART接口。為了說話有RS485總線的設備，我們可以添加一個RS485口用這個方便的RS485盾Arduino的。
- 使用這個方便的Arduino的RS485屏蔽RS-485端口添加到您的Arduino
- 帶有屏蔽層堆疊頭完全組裝
相比於RS485盾V1，你可以選擇從Arduino的D0到D7兩個引腳作為軟件串口與RS485通訊盾（D0和D1是硬件串行端口）。
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