Users Manual

RF1276D27 Long Distance Transceiver module V4.0
- 5 - 2016-6-12
E.g. The Central module sends data‘0x00 0x01 0x22 0x33 0x44 0x55’, all of the node modules with ID
‘0x00 0x00’ will receive the data ‘0x00 0x01 0x22 0x33 0x44 0x55’. If the ID of node module is larger
than 0x00 0x00, the node module with ID the same as the one in the first two bytes of data package can
receive the real data.
E.g. The Central module sends data ‘0x00 0x01 0x22 0x33 0x44 0x55’, the module with ID ‘0x00 0x01’
can get the data ‘0x22 0x330x440x55’and the first two byteID will be filtered.
In order to guarantee the reliability of communication, the length of data package should not exceed 64
bytes.
c. Relay module
RF1276D27 can act reply module when the peer to peer communication range is not enough. The Relay
module has the same hardware with RF1276D27 module, but Relay module has the different firmware.
The Relay module has two network IDs. One network ID is the same as the Central module. Another one
is the same as the Node module. Relay module acts as transfering the data from the Central or Node. In the
below chart, it is shown the Relay in the network.
The relay module can be configured via RF tool
The Net ID is the same as Central’s Net ID. The Node ID is the same as Net ID of Node. The other
parameters also should be the same as the network configuration.
d, Express communication mode.