HopeRF CMT2380F64W User manual

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Overview
This document mainly introduces the operation of two factory defaulted evaluation board, that is CMT2380F64-
QFN40-Eb and CMT2380F64-QFN48-EB (hereinafter referred to as CMT2380F64-EB). The evaluation platform
is designed specifically for users to evaluate the performance of CMT2380F64. As the controller kernel of
CMT2380F64 is a CM0 level single chip. This evaluation board can be regarded as its development board for
various functions of CMT2380F64 such as debugging, verification and testing.
The product models covered in this document are shown in the table below.
Table 1. Product Models Covered in This Document
Product Model Frequency
Range Modulation Method Chip Function Configuration Method Package
CMT2380F64-
EQR 127 – 1020 MHz (G)FSK
Integrated high-
performance RF
transceiver sigle chip
SoC QFN40
CMT2380F64-
EQR 127 – 1020 MHz (G)FSK
Integrated high-
performance RF
transceiver sigle chip
SoC QFN48
Remark:
1. Users are recommended to read the relavant document of CMT2300A in advance for the RF kernel of
CMT2380F64 is adopted from CMT2300A.
AN191
CMT2380F64-EB Evaluation Board User Guide

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Table of Contents
1Hardware Platform....................................................................................................................................4
1.1 CMT2380F64-EB Introduction.......................................................................................................... 4
1.2 CMT2380F64-QFN48-EB Introduction............................................................................................. 6
1.3 LCD Shiled Introduction.................................................................................................................... 8
2Introduction for Parameter Setting.........................................................................................................9
2.1 Startup Interface............................................................................................................................... 9
2.2 Main Menu Interface....................................................................................................................... 10
2.3 Modulation Submenu.......................................................................................................................11
2.4 Work Mode Submenu......................................................................................................................11
2.5 Frequencry Band Submenu............................................................................................................ 13
2.6 Data Rate Submenu....................................................................................................................... 13
2.7 Tx Output Power Submenu ............................................................................................................ 14
2.8 Preamble Length Submenu............................................................................................................ 15
2.9 Packet Length Submenu ................................................................................................................ 16
2.10 Coding Format Submenu ............................................................................................................... 17
2.11 CRC Select Submenu .................................................................................................................... 18
2.12 CRC Seed Value Submenu........................................................................................................... 18
2.13 CRC Result Inv Submenu .............................................................................................................. 19
2.14 Packet Structure............................................................................................................................. 19
2.15 Frequencry Space and Frequencry Channel Submenu................................................................. 20
2.16 Gaussian Select Submenu............................................................................................................. 21
2.17 Test Counter Submenu................................................................................................................... 22
2.18 Payload Content Submenu............................................................................................................. 24
2.19 AFC Select Submenu..................................................................................................................... 24
2.20 Dout Disable Submenu................................................................................................................... 25
2.21 Interval Select Submenu ................................................................................................................ 25
3Working Mode Description ................................................................................................................... 26
3.1 Sleep Mode..................................................................................................................................... 26
3.2 CW Tx Mode................................................................................................................................... 28
3.3 Direct Rx Mode............................................................................................................................... 30
3.4 Only Tx Mode ................................................................................................................................. 31
3.5 Only Rx Mode................................................................................................................................. 33
3.6 Tx and Rx Mode ............................................................................................................................. 34
4Supplymentary....................................................................................................................................... 37

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4.1 Firmware Update Burning Operation.............................................................................................. 38
4.2 Corresponding Mode for Each Function/Indicator.......................................................................... 41
5Revise History........................................................................................................................................ 43
6Contacts.................................................................................................................................................. 44

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1 Hardware Platform
CMT2380F64 comes in two packages, QFN40 and QFN48, which respecttively correspond to two evaluation
board: CMT2380F64-EB and CMT2380F64-QFN48-EB. As CMT2380F64 is an integrated transceiver, so the
two evaluation board itself owns the character of development board. The following shows introduction to the
two evaluation boards.
1.1CMT2380F64-EB Introduction
Top view and introduction of the CMT2380F64-EB is shown in the following figure.
3. CMT2380F64
2. J-Link Debug
Interface
1. SMA Connector
6. CH340G
USBto UART
Interface
9. USB TypeB Connector
10. DC +9V Input
4. Buzzer &
Buzzer Jumper
PB07
PB06
PB15
PB04
PB03
PC13
GND
NC
PB13
PB14
PA10
PA14
PA13
PA12
PA11
PA09
PA08
NC
PA00
PA02
PA03
PA04
PA06
PA01
VIN
GND
+5V
+3V3
MCU_RST
GND
11. Reset Key
USB TypeB
5. GPIO3 Test Point
7. GPIO1 & GPIO2
Test Point
8. UART Jumper
12. Current Detect Jumper
Figure 1-1. CMT2380F64-EB Top View

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Table 1-1. CMT2380F64-EB Description
Number
Function
Description
1 SMA Connector
CMT2380F64 connects to the antenna or test machine through the
SMA interface after matching complete.
2
J-link Debug Interface
J-link debug interface
（
SWD
）
3
CMT2380F64
CMT2380F64-EQR chip
4
Buzzer & Buzzer
Jumper
Board buzzer and the control port jumper
5 GPIO3 Test Point
Test point of CMT2380F64 RF part
，
GPIO3 on board is connected to
PC13.
6
CH340G
USB to UART
Interface
CH340G USB to the chip interface of UART
7
GPIO1 & GPIO2 Test
Point
Test point of CMT2380F64 RF part
，
GPIO1 is connected to PB14 and
GPIO2 is connected to PB13.
8 UART Jumper
CH340G chip jumper that connects to the MCU serial port
（
PA09
、
PA10
）
.
9
USB TypeB
Connector
USB interface，TypeB
10
DC +9V Input
Input interface of 9V direct current
11
Reset Key
Reset key of evaluation board
12
Current Detect
Jumper
The power consumption of each working state of CMT2380F64 can be
carried out by the current test jumper.
Note: For more detail information, please refer to the CMT2380F64-EB schematic diagram.
Table 1-2. CMT2380F64-EB Pin Function
Pin
Name
CMT2380F64-EB LCD Shiled[1] Pin Name
CMT2380F64-
EB
LCD Shiled
PA10
UART_RxD
PA00
PA00
LCD_SDIO
PA09
UART_TxD
PA01
PA01
LCD_RS
PA14
SWD_SLCK
LCD_LED
PA02
PA02
LCD_CS
PA13
SWD_SDIO
PA03
PA03
LCD_SCK
PA12
KEY2
KEY2
PA04
PA04
LCD_ROM_CS
PA11
KEY1
KEY1
PA06
PA06
LCD_ROM_SDIO
PA08
BUZZER
VIN
NC
--
GND
PB07
RF_FCSB
GND
PC13
RF_GPIO3
+5V
PB06
RF_CSB
+3V3
PB15
RF_SDIO[2]
MCU_RESET
PB04
RF_SDIO
NC
PB03
RF_SCK
NC
GND
PC14
32768Hz crystal
NC
--
LCD_RESET
PC15
32768Hz crystal
PB13
RF_GPIO2
KEY3
PB14
RF_GPIO1
KEY4
Note ：
[1]. LCD Shiled is a lattice screen shiled with size of 128x64 that can be plugged into the CMT2380F64-EB
； It
is a screen with 4 buttons and it can be used as function of human-computer interaction input and display. For
the LCD_RESET pin of the shield board is corresponded to the NC pin of CMT2380F64-EB, the LCD_RESET
pin of the LCD shield cannot be controlled. In order to effectively reset LCD screen after the LCD shield is
powered on, a 100nF capacitor is needed to be connected to the LCD_RESET pin of the LCD shield.

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[2].The RF core is from CMT2300A, and its control bus is 3-wire SPI. In general, the analog 3-wire SPI timing
sequence is adopted and the SPI speed is not fast enough. To increase the SPI speed, 4-wire SPI delivered
with the controller can be connected to the RF 3-wire SPI. In this case, both of MOSI and MISO of the controller
need to be connected to the RF_SDIO together. Considering the conflict between the two ports, a 1K resistance
is connected in series between PB15 and PB04/RF_SDIO on board.
1.2CMT2380F64-QFN48-EB Introduction
Below shows top view and introduction of CMT2380F64-QFN48-EB.
Power On/Off
3. CMT2380F64
2. J-Link Debug
Interface
1. SMA Connector
6. CH340G
USBto UART
Interface
9. USB TypeB Connector
11. DC +9V Input
4. Buzzer &
Buzzer Jumper
PB07
PB06
PB15
PB04
PB03
PC13
GND
PB12
PB13
PB14
PA10
PA14
PA13
PA12
PA11
PA09
PA08
PA07
PA00
PA02
PA03
PA04
PA06
PA01
VIN
GND
+5V
+3V3
MCU_RST
GND
12. Reset Key
USB TypeB
5. GPIO3 Test Point
7. GPIO1 & GPIO2
Test Point
8. UART Jumper
13. Current Detect Jumper
10. Power Switch
14. BOOT0 Jumper
PA15
PB08
Figure 1-2. CMT2380F64-QFN48-EB Top View
Note: For more information, please refer to the schematic diagram of CMT2380F64-QFN48-EB.

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Table 1-3. CMT2380F64-QFN48-EB Description
Number
Function
Description
1 SMA Connector
CMT2380F64 connects to the antenna or test machine through the
SMA interface after matching complete.
2
J-link Debug
Interface
J-link debug interface（SWD）
3
CMT2380F64
CMT2380F64-EQR chip
4
Buzzer & Buzzer
Jumper
Board buzzer and the control port jumper
5 GPIO3 Test Point
Test point of CMT2380F64 RF part
，
GPIO3 on board is connected to
PC13.
6
CH340G
USB to UART
Interface
CH340G USB to the chip interface of UART
7
GPIO1 & GPIO2 Test
Point
Test point of CMT2380F64 RF part
，
GPIO1 is connected to PB14
and GPIO2 is connected to PB13.
8 UART Jumper
CH340G chip jumper that connects to the MCU serial port
（
PA09
、
PA10
）
.
9
USB TypeB
Connector
USB interface，TypeB
10
Power Switch
Power switch
（
switch the power supply or direct current supply
）
11
DC +9V Input
Input interface of 9V direct current
12
Reset Key
Reset key of evaluation board
13
Current Detect
Jumper
The power consumption of each working state of CMT2380F64 can
be carried out by the current test jumper.
14
BOOT0 Jumper
Controller BOOT0 jumper selection
Table 1-4. CMT2380F64-QFN48-EB Controller Pin Function
Pin
Name
QFN48-EB LCD Shiled[1] Pin Name QFN48-EB LCD Shiled
PA10
UART_RxD
PA00
PA00
LCD_SDIO
PA09
UART_TxD
PA01
PA01
LCD_RS
PA14
SWD_SLCK
LCD_LED
PA02
PA02
LCD_CS
PA13
SWD_SDIO
PA03
PA03
LCD_SCK
PA12
KEY2
KEY2
PA04
PA04
LCD_ROM_CS
PA11
KEY1
KEY1
PA06
PA06
LCD_ROM_SDIO
PA08
BUZZER
VIN
PA07
PA07
GND
PB07
RF_FCSB
GND
PC13
RF_GPIO3
+5V
PB06
RF_CSB
+3V3
PB15
RF_SDIO[2]
MCU_RESET
PB04
RF_SDIO
PB08
PB08
PB03
RF_SCK
PA15
PA15
GND
PC14
32768Hz crystal
PB12
PB12
LCD_RESET
PC15
32768Hz crystal
PB13
RF_GPIO2
KEY3
PF00
12MHz crystal
PB14
RF_GPIO1
KEY4
PF01
12MHz crystal
Note ：
[1]. LCD Shiled is a lattice screen shiled with size of 128x64 that can be plugged into the CMT2380F64-EB
； It
is a screen with 4 buttons and it can be used as function of human-computer interaction input and display. For
the LCD_RESET pin of the shield board is corresponded to the PB12 pin of CMT2380F64-QFN48-EB, the LCD
screen can be effectively reset by PB12.
[2].The RF core is from CMT2300A, and its control bus is 3-wire SPI. In general, the analog 3-wire SPI timing

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sequence is adopted and the SPI speed is not fast enough. To increase the SPI speed, 4-wire SPI delivered
with the controller can be connected to the RF 3-wire SPI. In this case, both of MOSI and MISO of the controller
need to be connected to the RF_SDIO together. Considering the conflict between the two ports, a 1K resistance
is connected in series between PB15 and PB04/RF_SDIO on board.
1.3LCD Shiled Introduction
Below shows top view and introduction of LCD Shiled.
CMOSTEK
SW 20230203
LCDShiled
S1
S2 S3
S4
1. 128x64 LCD
2. S1~S4 Buttons
Figure 1-3. LCD Shiled Top View
Table 1-4. LCD Shiled Description
No.
Function
Remark
1
128x64 LCD screen
2
S1~S4 Button

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2 Introduction for Parameter Setting
A firmware will be pre-burned around the chip before delivery for multiple functional test and evaluation (it needs
to be used together with LCD shield display) for CMT2380F64-EB or CMT2380F64-QFN48-EB. This firmware
will be updated from time to time as functional changes, it can be downloaded from the official website of HOPE
and it will be updated through J-Flash software from J-link debugger (the updated firmware is described in detail
in Chapter 4 of this article). In this chapter, parameter setting menu of the factory firmware will be introduced in
detail.
2.1Startup Interface
The startup interface is show in Fig. 2-1.
CMOSTEK
SW 20230203
1. Software Version
Figure 2-1. Startup Interface
No.
Function
Description
1 Software Version
Factory firmware
（
CMT2380F64 burning software
）
version
information, as shown in the above figure, it indicates that the
current operation version is: 20230203
The startup interface of RF indentified failed is shown as Fig 2-2 (chip abnormal)
not found radio
Figure 2-2. Startup Interface as RF Identification Failed

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2.2Main Menu Interface
The main menu interface will pop up 1 second after the startup interface, as shown in Figure 2-3.
CMT2380F64 EB GUI
1 Modulation
2 Work Mode
3 Frequencry Band
4 Data Rate
2. Rolling submenu
1. Title
3. Button for
functional selection
Figure 2-3. Main Menu Interface
No.
Function
Description
1
Title
CMT2380F64 EB GUI
2 Rolling submenu
15 submenu selections are shown in the area
：
1. Modulation（Modulation and demodulation mode
selection）
2. Work Mode（Working mode selection）
3. Frequencry Band（Frequency band selection）
4. Data Rate（Rate/frequency offset parameter selection）
5. Tx Output Power（Transmission power selection）
6. Preamble Length（Preamble length selection）
7. Packet Length（Packet length selection）
8. Coding Format（Coding format selection）
9. CRC Select（CRC verification mode selection）
10. Freq Space（Frequency offset interval setting）
11. Freq Channel（Frequency channel signal setting）
12. Gaussian Select（Gaussian mode selection）
13. Test Counter（Test counter for packet TX）
14. Payload Content（Method for payload content）
15. AFC Select
（
Switch Selection for AFC
）
3 Button for functional selection
The positions of S1 - S4 are corresponding to 5 signals.
：It is corresponding to S2（left button），indicating that the
firmware will enter into working state as parameters/modes set
by the above menus with short press；
：with no option；
：It is corresponding to S4（down button）， indicating that the
firmware will enter the next selection with short press；
：It is corresponding to S1（up button）， indicating that the
firmware will enter the above selection with short press
；

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No.
Function
Description
：
It is corresponding to S3
（
right button
），
indicating that
the firmware will enter the current selection with short press
；
Operation of the main menu interface：
1. Select the required modified submenu by short press the S4（）and S1（ ）, the selected
submenu will flash accordingly.
2. Select the submenu respectively to set the corrsponding parameters by short press S3（）.
3. Enter into the corresponding working mode according to the setting by short press S2（）.
2.3Modulation Submenu
Select submenu“1 Modulation”and press S3 button will enter into the interface shown as followed.
CMT2380F64 EB GUI
1 Modulation
2FSK
1. Rolling option area
Figure 2-4. Modulation Submenu Interface
No.
Function
Description
1 Rolling option area
3 modulation and demodulation modes can be selected by short
pressing S1 or S4.
OOK
2FSK
After selecting the corresponding modulation and demodulation
modes, press S2 or S3 to comfirm and return to the upper menu
(i.e. the main menu).
2.4Work Mode Submenu
Select submenu “2 Work Mode”and press S3 button will enter into the interface shown as followed.

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CMT2380F64 EB GUI
2 Work Mode
Tx and Rx Mode
1. Rolling option area
Figure 2-5. Work Mode Submenu Interface
No.
Function
Description
1 Rolling option area
6 working modes can be selected by short pressing S1 or S4 ;
Sleep（only the RF part enters into sleep mode and the
controller still at working mode, supporting interface operation）
CW Tx（enter into CW Tx mode）
Direct Rx（enter into direct Rx mode）
Only Tx Mode（enter into only Tx mode, unidirectional
mode）
Only Rx Mode（
enter into only Rx mode, unidirectional
mode）
Tx and Rx Mode（enter into Tx and Rx mode – bidirectional
mode）
After selecting the corresponding modulation mode,short press
S2 or S5 to comfirm and return to the upper menu (i.e. the main
menu).
Note: In main menu state, the working mode is entered by short pressing S2 ( ) in accordance with the
selected modes in sub-menu.

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2.5Frequencry Band Submenu
Select submenu “3 Frequencry Band”and press S3 button will enter into the interface shown as followed.
CMT2380F64 EB GUI
3 Frequencry Band
433000kHz
1. Rolling option area
Figure 2-6. Frequencry Band Submenu Interface
No.
Function
Description
1 Rolling option area
The following 6 freqency band can be selected by short pressing
S1 or S4:
169000kHz（i.e. the start frequency is 169MHz）
230000kHz （i.e. the start frequency is 230MHz）
314000kHz （i.e. the start frequency is 314MHz）
433000kHz （i.e. the start frequency is 433MHz）
470000kHz （i.e. the start frequency is 470MHz）
779000kHz （i.e. the start frequency is 779MHz）
863000kHz （i.e. the start frequency is 863MHz）
902000kHz （i.e. the start frequency is 902MHz）
After selecting the corresponding modulation mode, press S2 or
S3 to comfirm and return to the upper menu (i.e. the main menu).
Note: ThE submenu is selected as the start frequency, because frequency offset can be achieved through
ferq. Space and freq. Channel. For more information, please see at the Freq.Space and Freq. Channel
submenu section.
2.6Data Rate Submenu
Select the 4 Data Rate and press S3 to enter the submenu, as shown in Figure 2-7.

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CMT2380F64 EB GUI
4 Data Rate
20kbps 10kHz
1. Rolling option area
Figure 2-7. Data Rate Submenu Interface
No.
Function
Description
1 Rolling option area
Different data rate and frequency offset can combine differently
according to different modulation modes by short pressing S1 or
S4.
OOK mode：
-2kbps
-5kbps
-10kbps
-20kbps
-40kbps
2FSK mode：
-2kbps, 10kHz（i.e. data rate is 2kbps，offset is +/-10kHz）
-10kbps, 10kHz
-20kbps, 20kHz
-50kbps, 25kHz
-100kbps, 50kHz
-200kbps, 100kHz
-300kbps, 100kHz
After selecting the corresponding modulation mode, short press
S2 or S3 to comfirm and return to the upper menu (i.e. the main
menu).
Note
：
1. The combined parameters of rate/frequency offset provided in each modulation and demodulation mode
are basically corresponding to the test parameters in the CMT2380F64 data manual for the convenience of
retest and confirm by users.
2. For the rate/frequency offset combination parameters provided in each modulation and demodulation
mode, all the configuration parameters are derived from RFPDK, and the crystal deviation is set at 10ppm.
2.7Tx Output Power Submenu
Select the 5 Tx Output Power and press S3 to enter the submenu, as shown in Figure 2-8.

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CMT2380F64 EB GUI
5 Tx Output Power
+20 dBm
1. Rolling option area
Figure 2-8. Tx Output Power Submenu Interface
No.
Function
Description
1 Rolling option area
In this area, different Tx power can be selected by short pressing
K3 or K4：
-10dBm
-7dBm
-3dBm
0dBm
+3dBm
+7dBm
+10dBm
+13dBm
+17dBm
+20dBm
After selecting the corresponding modulation mode, short press
S2 or S3 to comfirm and return to the upper menu (i.e. the main
menu).
Note
：
1. The matching parameters of CMT2380F64-EB and CMT2380F64-QFN48-EB are different according to
the frequency. For example, CMT2380F64-EB -434MHz indicates that its optimal matching parameter patch
component is at 434MHz frequency band; CMT2380F64-EB-868MHz indicates that its optimal matching
parameter patch component is at 868MHz frequency band. Thus the accurate transmission power effect can
be tested by selecting optimal working frequency band in accordance with the EM.
2. The transmit power adjustment is applicable to the operating frequency band of 314MHz, 433MHz,
863MHz and 902MHz (click Frequencry Band on the menu). If the Tx power of 169MHz and 230MHz,
470MHz donnot optimized, the presentation effect will be offset.
2.8Preamble Length Submenu
Select the 6 Preamble Length and press S3 to enter the submenu, as shown in Figure 2-9.

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CMT2380F64 EB GUI
6 Preamble Length
64 Bytes
1. Rolling option area
Figure 2-9. Preamble Length Submenu Interface
No.
Function
Description
1 Rolling option area
In this area different preamble length can be selected by short
pressing S1 or S4：
8 Bytes
16 Bytes
32 Bytes
64 Bytes
128 Bytes
256 Bytes
512 Bytes
1024 Bytes
After selecting the corresponding modulation mode, press S2 or
S3 to comfirm and return to the upper menu (i.e. the main menu).
2.9Packet Length Submenu
Select the 7 Packet Length and press S3 to enter the submenu, as shown in Figure 2-10.
CMT2380F64 EB GUI
7 Packet Length
64 Bytes
1. Rolling option area
Figure 2-10. Packet Length Submenu Interface

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No.
Function
Description
1 Rolling option area
In this area different Payload Length can be selected by short
pressing S1 or S4：
8 Bytes
16 Bytes
32 Bytes
64 Bytes
128 Bytes
256 Bytes
512 Bytes
1024 Bytes
After selecting the corresponding modulation mode, press S2 or
S3 to comfirm and return to the upper menu (i.e. the main menu).
2.10 Coding Format Submenu
Select the 8 Coding Format and press S3 to enter the submenu, as shown in Figure 2-11.
CMT2380F64 EB GUI
8 Coding Format
NRZ
1. Rolling option area
Figure 2-11. Coding Format Submenu Interface
No.
Function
Description
1 Rolling option area
In this area, different coding format can be selected by short
pressing S1 or S4：
NRZ（Non-Return-Zero encoding）
Whitening（Whitening encoding）
Manchester（Manchester encoding）
FEC TypeA
FEC TypeB
After selecting the corresponding modulation mode, press S2 or
S3 to confirm the selection and return to the upper menu (i.e. the
main menu).
Note
：
1. The Whitening code is in the PN9-CCITT mode (according to the default option of RFPDK), and the
Whitening Seed value is set to 0x01FF
；
2. The Manchester encoding uses logic_1=2
’ b01 ， logic_0=2 ’ b10, and SyncWord enables the
Manchester code
；
3. The FEC configuration is referred to the related AN of CMT2300A or RFPDK.

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2.11 CRC Select Submenu
Select the 9 CRC Select and press S3 to enter the submenu, as shown in Figure 2-12.
CMT2380F64 EB GUI
9 CRC Select
CRC16 CCITT
1. Rolling option area
Figure 2-12. CRC Select Submenu Interface
No.
Function
Description
1 Rolling option area
In this area, different CRC verification format can be selected by short
pressing S1 or S4：
CRC16-CCITT
CRC16-IBM
After selecting the corresponding modulation mode, press S2 or
S3 to comfirm and return to the upper menu (i.e. the main menu).
Note ：
1. No matter which kind of CRC verification mode is selected, the Seed value of CRC is 0.
；
2. If the Packet Length is relatively long, the CRC32 mode is recommended
；
2.12 CRC Seed Value Submenu
Select the 10 CRC Seed Value Submenu and press S3 to enter the submenu, as shown in Figure 2-13.
CMT2380F64 EB GUI
10 CRC Seed Value
0x0000 1. Option area

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Figure 2-13. CRC Seed Value Submenu Interface
No.
Function
Description
1 Option area
Different CRC Seed Value can be selected by short pressing S1
or S4：
Options are as followed：
-0x0000
-0xFFFF
-0x1D0F
After selecting the corresponding modulation mode, press S2 or
S3 to confirm and return to the upper menu (i.e. the main menu).
2.13 CRC Result Inv Submenu
Select the 11 CRC Result Inv Submenu and press S3 to enter the submenu, as shown in Figure 2-14.
CMT2380F64 EB GUI
11 CRC Result Inv
On
1. Option area
Figure 2-14. CRC Result Inv Submenu Interface
No.
Function
Description
1 Option area
Different CRC Result Invert can be selected by short pressing S1
or S4( the calculation of CRC value takes reverse)：
On，indicates that the CRC calculation result value is
reversed；
Off，indicates that the CRC calculation result value is not
reversed；
After selecting the corresponding modulation mode, press S2 or
S3 to confirm and return to the upper menu (i.e. the main menu).
2.14 Packet Structure
Chapters from 2.8 to 2.11 are related to the packet structure. Therefore, this section is mainly for describing the
packet structure mode of the firmware, as shown in Figure 2-13.

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Preamble SyncWords Payload CRC
Coding Format
Figure 2-13. Packet Structure
1. The test Packet adopts fixed-length packet mode. The Payload Length is configured by the 7 Packet Length
submenu；
2. The Preamble transmission Length of packet is set from the 6 Preamble Length submenu with unit of 8
bits. The Preamble values are configured as followed：
Modulation/Demodulation
Mode
Preamble Value
OOK
0xAA
2FSK
0xAA
3. The SyncWords value of the test packet is set to 6 bytes and the value is 0x2DD42DD42DD4；
4. CRC mode is set by the "9 CRC Select" submenu；
5. The Payload content is set from the Payload Content menu, it can be set as random number or increasing
data;
6. The Coding Format (content set by the 6 Coding Format submenu) affects the packet range, as shown in
the figure above, which mainly applies to the Payload and CRC. Noted that when the encoding mode of the
packet in this firmware uses Manchester encoding, the SyncWords also uses Manchester encoding.
2.15 Frequencry Space and Frequencry Channel Submenu
The 10 Freq Space and 11 Freq Channel submenus are associated with each other and they aims to the RF
Channel Settings. The 10 Freq Space sub-menu sets Frequencry Space, i.e. the channel interval value, with
setting range from 0 to 255 in kHz unit. The 11 Freq Channel submenu sets the Frequencry Channel, i.e. the
Channel signal, with setting range from 0 to 255. The transceiver frequency offset can be calculated through
the formula showned as followed：
Frequencry Offset =Frequencry_ × 2.5kHz × _ℎ（kHz）
This Frequency Offset take the initial frequency set in the "3 Frequencry Band". Since the maximum value of
these two settings is 255, therefore the maximum Frequencry Offset can achieve in range from 0MHz to 162MHz
with unit of 2.5kHz. For example, if the target frequency is 433.92MHz, then you can set the starting frequency
to 433000kHz in the "3 Frequencry Band", and Frequencry Space value to 184, Frequencry Channel to 2.
Select the 10 Freq Space or 11 Freq Channel and press S3 to enter the submenu, as shown in Figure 2-14 or
Figure 2-15.