Linx Technologies HUM-xxx-DT - Manual (Page 21)

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Read Radio State - Command Code = 2D
This command reads the current radio state.
The response returns the Radio State Code for the radio’s current working
state. The module can be in one of the five states shown in Figure 36.
The Unknown state indicates an error has happened.
The Sleep state is a low-power state where the radio is powered off, but
some microcontroller blocks are running.
The Idle state is a state where the RX section of the radio is turned off.
However, the module can still switch to the TX On state when it has
something to send. The microcontroller is running.
The RX On mode is where the radio is in receive mode and the
microcontroller is running.
The TX On state is where the radio is in transmit mode and the
microcontroller is running.
Read Radio State Command and Response
Command
Start Command End
3C 2D 3E
Response
Start Response Param 1 End
3C 2D RState 3E
Radio State Codes
RState Code Radio State Description
0x00 Unknown An error has happened
0x01 Sleep The radio is in sleep mode (turned off).
0x02 Idle The radio is turned on in an idle mode (neither TX nor RX)
0x03 RX On The radio is in RX mode.
0x04 TX On
TX state is automatically entered when data is input to
the module.
Figure 35: Read Radio State Command and Response
Figure 36: Radio State Codes
Write Radio State - Command Code = 2E
This command sets the current Radio State.
This command places the module into one of the RState codes shown in
Figure 38.
The module automatically enters the TX state when there is data to be
transmitted by the radio. It cannot be manually controlled by issuing a serial
command.
Only EDs can go into Sleep, power down and Idle. APs and REs must stay
awake.
The response parameter indicates if the command was successful (00) or if
there was an error (01).
Write Radio State Command and Response
Command
Start Command Param 1 End
3C 2E RState 3E
Response
Start Response Param 1 End
3C 2E Status 3E
Figure 37: Write Radio State Command and Response
Radio State Codes
RState Code Radio State Description
0x00 Awake
Wakes up the module from Sleep or Power Down and
brings it to RX On
0x01 Sleep Puts the radio into sleep state (turned off)
0x02 Idle Sets the radio to idle state (neither TX nor RX)
0x03 RX On Turns on the receiver, also wakes from Sleep
0x04 PDN Puts the module into Power Down state
Figure 38: Radio State Codes