Linx Technologies HUM-xxx-DT - Manual (Page 14)

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Command Data Interface
The DT Series transceiver has a serial Command Data Interface (CDI)
that is used to configure and control the transceiver through software
commands. This interface consists of a standard UART with a serial
command set. The CMD_DATA_IN and CMD_DATA_OUT lines are the
interface to the module’s UART. The UART is configured for 1 start bit, 1
stop bit, 8 data bits, no parity and no flow control.
The general serial command format for the module is:
[Start Delimiter] [Command] [Parameters] [Data] [End Delimiter]
The Start Delimiter has a fixed value of 0x3C (the ‘<’ ASCII character).
The Command codes are shown in Figure 20. The Command Data
Interface Command Set section goes into the commands in detail.
The Data field is only available with the Send Data Packet and Send
Broadcast Packet commands. This is the data that is transmitted over the
air. The maximum number of data bytes in one data packet is 32 bytes.
The End Delimiter has a fixed value of 0x3E (the ‘>’ ASCII character).
If a command sent to the module is successful, a response is returned. The
general serial command response format is:
[Start Delimiter] [Response] [Parameters] [End Delimiter]
The Start Delimiter has a fixed value of 0x3C (the ‘<’ ASCII character).
The Response Type code for each command is the same as the Command
Type code. All the available Command Types are shown in Figure 20.
The Response Parameters for each type of response are detailed in
the Command Data Interface Command Set section along with the
corresponding command.
The End Delimiter has a fixed value of 0x3E (the ‘>’ ASCII character).
All values are in hexadecimal format.
CDI Command Codes
Command Code
(hex)
Parameters
(bytes)
Data
(bytes)
Command Type Definition
21 6 0–32 Send Data Packet
22 0 0 Read Non-volatile Configurations
23 54 0 Write Non-volatile Configurations
24 2 0 Read I/O Configurations
26 2 0 Read Analog Voltage Value
27 2 0 Read Digital IO Value
28 3 0 Write Digital Output Value
29 0 0 Read Channel Number
2B 0 0 Read TX Power Level
2C 1 0 Write TX Power Level
2D 0 0 Read Radio State
2E 1 0 Write Radio State
2F 0 0 Read Ambient RSSI
30 0 0 Restore Factory Default Configurations
31 0 0 Read Device Name
32 0 0 Read Firmware Version
33 0 0 Read Module Serial Number
37 0 0 Read Frequency Agility Configurations
38 1 0 Write Frequency Agility Configurations
39 1 0–32 Send Broadcast Packet
3A 0 0 Read Associated Modules
3B 4 0 Delete Associated Module
3C 0 0 Reset Module
3D 0 0 Read Associated Module Count
42 1 0 CW Signal
43 0 0 Read AES Key
44 16 0 Write AES Key
7A 1 0 Initialization Complete Message
Figure 20: HumDT TM CDI Command Codes