AppconWireless RF1276 Series Manuel - Page 12
Parcourez en ligne ou téléchargez le pdf Manuel pour {nom_de_la_catégorie} AppconWireless RF1276 Series. AppconWireless RF1276 Series 16 pages. Lora module
Imprimer la pageRF1276
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