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6.2 LINK description
The LINK pin indicates the current network status, after the node is connected to the network, the current pin is
pulled low. The external device can query the device network status through the pin level. In the coordinator mode, the
pin indicates if the module establishes the network normally.
6.3 ACK description
The ACK pin is used to indicate the status of the last user's data transmission. Before transmitting, the pin is pulled
low. After the transmission is successful, the pin is pulled high. Users can use this pin state to judge if the data has
arrived successfully. This pin function cannot indicate the coordinator to send broadcast message.
Note: In 802.15.4 protocol, the device will use the CSMA/MA technology to access the channel before sending data.
When the receiving device receives the data, the returned ACK does not have this mechanism. This means that even if
the receiving device can receive data in extreme conditions, sending device ACK pin indicates that the last data
transmission failed.
7. Operating mode
M1
Coordinator mode
0
Normal node
0
Dormant node
1
Sleep mode
1
7.1 Coordinator mode
If users configure the operating mode as 4,（M0=0,M1=0）or users configure the operating mode as 0, the module
works in the coordinator mode. In the coordinator mode, the coordinator can set up the network, coordinator is the
central node of the network, there must be a coordinator in the network.
The coordinator configurable data input mode is:
Broadcast transmission. When configured to broadcast, all non-dormant devices on the entire network will receive
data. The ACK pin indicates transmission successfully all the time.
Short address transmission, when configured to short address transmission, the user must specify the short address
before sending data.
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Description
M0
Set up a network to manage network
0
node information
Send and receive data at any time
1
Low-power reception, sending data at
0
any time
Cannot send and receive data, system
1
sleeps
E70-915NW14S User Manual
Remarks
Transfer data according to input and output
modes
High real-time performance
Receive delay, send data need to wake up
the serial port
The fixed baud rate is 115200 8N1
13
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