AppconWireless RF1276 Series Manuel - Sayfa 12

Kontrol Ünitesi AppconWireless RF1276 Series için çevrimiçi göz atın veya pdf Manuel indirin. AppconWireless RF1276 Series 16 sayfaları. Lora module

RF1276

LoRa module

V3.0

Figure 7: Connection between Module and Device(TTL/RS232 port)

Figure 8: Connection between Module and Device(RS485 port)

10. Constructing Network (one point to multi-point):

RF1276 is a semi-duplex module, which can be communicated by point to point or one point to

multi-point. In the second mode, user needs to set one master module, while the others are slave modules.

Every module must only have one unique ID. The coordination of communication is controlled by the

master module, which sends data or commands including ID information. All slave modules can receive

the data packets, and compare the ID with itself. If they are matched, the module will deal with the data

packets. Otherwise, it will discard them. In order to avoid interfering each other, only one module can be

in transmitting state when the network is working. RF1276 can set many different frequencies so that

many networks can work in the same place and at the same time.

User should pay attention to the following questions based on the complex transfers in the air and some

inherency characteristics of wireless communication:

1）Latency of wireless communication

The wireless terminal keeps receiving data packets after waiting for a while to ensure no data any more.

There should be tens to hundreds mil-seconds latency from transfer to receiver (the exact latency depended

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2018-2-12