User Manual
2014 Cervis, Inc.
13
8.3 Receive
This message instructs the module to enter receive mode for the specified time in milliseconds.
The module will dwell in the receive state until a packet is received or the timeout expires. At
this time the module will return to the state specified in the Default Mode parameter. If a
transmit command is issued while this command is active it will clear the receive timer and
terminate the current receive operation. This message is not necessary when the Default Mode
parameter is set to RX.
Table 9. Receive Message Structure
Receive ID = 0x20, Reply = 0xB0.
0
1
2
ID
Options
Time
0x20
The options field is binary-encoded and defined as:
Bit
Option
Description
0
Message ACK
If set, send an ACK message to this receive request.
1
Timeout ACK
If set, send an ACK message when the timer expires and no packet was received.
The structure of a received packet varies slightly from the receive request. The structure is
illustrated below.
0
1
2
..
n
ID
RSSI
Payload
0xB0
The received packet contains the RSSI value as observed during the RF reception of the packet,
along with the packet payload. Based on RX Filter Options, addressing information at the front
of the packet may or may not be present.
The RSSI indicator can be converted to dBm with the following linear formula
2
Offset should be TBD.
