Programming

Here you will find the details needed for develop your own firmware for the device
If you are interested in writing firmware for the VALTRACK-V4-VTS device, you will need to know where is each pin of MCU is connected to.
Since the schematics of the device is not yet openly available, We are providing the MCU pin connection details, which should be able to help you in determining how is the whole architecture laid out. Watching our device intro video would also help to get an overall idea on the hardware present on board.
MCU Pinout Details
Pin Number
Pin Name
Net Name
Connected to
1
VBAT
3VDC
3VDC
2
PC14-OSC32_IN
CLK_IN
32.768 KHz crystal
3
PC15-OSC32_OUT
CLK_OUT
32K.768 KHz crystal
4
PH3-BOOT0
BOOT0
BOOT0 pull down resistor
5
PB8
NET_LED_R
Network - RED LED - Cathode pin
6
PB9
NET_LED_G
Network - GREEN LED - Cathode pin
7
NRST
RESET
Debug connector MCU Reset lines via RC network
J60 pin no 1
J56 pin no 6
8
VDDA
3VDC
3VDC
9
PA0
SIM_PWRKEY_3V3
SIM7600x PWRKEY pin through N channel MOSFET.
Making this pin HIGH pulls PWRKEY pin to GND
10
PA1
DTR_3V3
SIM7600x DTR input pin through level translator.
11
PA2 / LPUART1_TX
LPUART1_TX
SIM7600x RXD input pin through level translator.
12
PA3 / LPUART1_RX
LPUART1_RX
SIM7600x TXD output pin through level translator.
13
PA4
ANALOG_IN
VCHG input through voltage divider resistor network.
R22,R33 govern the voltage at this pin.
Default values : R22 = 100K, R33 = 23.7K, effectively giving 2.87V for VCHG = 15V
14
PA5
GEN_LED_B
Location - BLUE LED - Cathode pin
15
PA6
NET_LED_B
Network - BLUE LED - Cathode pin
16
PA7
BAT_LED_R
Battery - RED LED - Cathode pin
17
PA8
RELAY
RELAY MOSFET driver Gate Input
Open drain driver with Drain pin of MOSFET exposed on a connector
18
PA9 / USART1_TX
UART_TX1
SE868K3AL RX0 input pin
19
PB2
GEN_LED_G
Location - GREEN LED - Cathode pin
20
VDD
3VDC
3VDC
21
RF1
RF1
Bluetooth PCB antenna via matching network
22
VSSRF
GND
System Ground
23
VDDRF
3VDC
3VDC
24
OSC_OUT
OSC_OUT
32 MHz crystal
25
OSC_IN
OSC_IN
32 MHz crystal
26
AT0
ATO
Not connected
27
AT1
AT2
Not connected
28
PB0
INT1
INT1 interrupt output of LIS3DH Accelerometer
29
PB1
GPS_ENABLE
Enable input of power gating MOSFET for SE868K3AL GNSS module
Making this pin high provides 3VDC to SE868KAL module
30
PE4
RELAY1
Not connected
31
VFBSMPS
VFBSMPS
3VDC
32
VSSSMPS
GND
System Ground
33
VLXSMPS
VLXSMPS
3VDC
34
VDDSMPS
VDDSMPS
3VDC
35
VDD
3VDC
3VDC
36
PA10 / USART1_RX
UART1_RX1
SE868K3AL TX0 output pin
37
PA11
GSM_ENABLE
Enable input of power gating MOSFET for SIM7600x LTE module
Making this pin high provides ~4VDC to SIM7600x module
38
PA12
GEN_LED_R
Location - RED LED - Cathode pin
39
PA13 / JTMS_SWDIO
SWDIO
Debug connector SWDIO lines
J60 pin no 3
J56 pin no 8
40
VDDUSB
VDDUSB
3VDC
41
PA14 / JTMS_SWCLK
SWCLK
Debug connector SWDIO lines
J60 pin no 2
J56 pin no 7
42
PA15
SOS
Tactile switch input
Pulled up, filtered and Active LOW
43
PB3
BAT_LED_B
Battery - BLUE LED - Cathode pin
44
PB4
TPS_ENABLE
Enable input of switching regulator TPS54240
Making this pin high powers the system via VCHG connector.
Not connected by default as it will cause system into reset loop if no alternate backup battery power available
45
PB5
BAT_LED_G
Battery - BLUE LED - Cathode pin
46
PB6 / I2C1_SCL
IIC_CLK
I2C clock of LIS3DH Accelerometer and M24M01 EEPROM
47
PB7 / I2C1_SDA
IIC_DATA
I2C data of LIS3DH Accelerometer and M24M01 EEPROM
48
VDD
3VDC
3VDC
J60 - MCU Debug Connector [SMT pads] - Pinout Details
Pin Number
Pin Name
Connected to
1
RESET
MCU Reset pin
2
SWCLK
MCU SWCLK pin
3
SWDIO
MCU SWDIO pin
4
GND
System Ground
5
VCC
3VDC
J56 - Flex Debug Connector [0.5mm 10 pin FFC] - Pinout Details
Pin Number
Pin Name
Connected to
1
SIM_USB_DN
SIM7600x USB_DN pin
2
SIM_USB_DP
SIM7600x USB_DP pin
3
SIM_USB_VBUS
SIM7600x USB_VBUS pin
4
UART_RX1
SE868K3AL TX0 output pin
MCU USART1_RX pin
5
UART_TX1
SE868K3AL RX0 input pin
MCU USART1_TX pin
6
RESET
MCU Reset pin
7
SWCLK
MCU SWCLK pin
8
SWDIO
MCU SWDIO pin
9
GND
System Ground
10
VCC
3VDC
J57 - SIM7600x USB Connector [SMT pads] - Pinout Details
Pin Number
Pin Name
Connected to
1
SIM_USB_DN
SIM7600x USB_DN pin
2
SIM_USB_DP
SIM7600x USB_DP pin
3
SIM_USB_VBUS
SIM7600x USB_VBUS pin
4
UART_RX1
SE868K3AL TX0 output pin
MCU USART1_RX pin
5
UART_TX1
SE868K3AL RX0 input pin
MCU USART1_TX pin
J62 - VCHG Connector [SMT pads] - Pinout Details
Pin Number
Pin Name
Connected to
1
VCHG
VCHG input of system through FUSE and diode
12VDC to 42VDC input
2
GND
System Ground
J41 - VBAT Connector [SMT pads] - Pinout Details
Pin Number
Pin Name
Connected to
1
VBAT
VBAT input of system or Backup battery input
3.7V to 4.2V battery input
2
GND
System Ground

Configuration

PCB Design

Last modified 7mo ago

Pin Number	Pin Name	Net Name	Connected to
1	VBAT	3VDC	3VDC
2	PC14-OSC32_IN	CLK_IN	32.768 KHz crystal
3	PC15-OSC32_OUT	CLK_OUT	32K.768 KHz crystal
4	PH3-BOOT0	BOOT0	BOOT0 pull down resistor
5	PB8	NET_LED_R	Network - RED LED - Cathode pin
6	PB9	NET_LED_G	Network - GREEN LED - Cathode pin
7	NRST	RESET	Debug connector MCU Reset lines via RC network J60 pin no 1 J56 pin no 6
8	VDDA	3VDC	3VDC
9	PA0	SIM_PWRKEY_3V3	SIM7600x PWRKEY pin through N channel MOSFET. Making this pin HIGH pulls PWRKEY pin to GND
10	PA1	DTR_3V3	SIM7600x DTR input pin through level translator.
11	PA2 / LPUART1_TX	LPUART1_TX	SIM7600x RXD input pin through level translator.
12	PA3 / LPUART1_RX	LPUART1_RX	SIM7600x TXD output pin through level translator.
13	PA4	ANALOG_IN	VCHG input through voltage divider resistor network. R22,R33 govern the voltage at this pin. Default values : R22 = 100K, R33 = 23.7K, effectively giving 2.87V for VCHG = 15V
14	PA5	GEN_LED_B	Location - BLUE LED - Cathode pin
15	PA6	NET_LED_B	Network - BLUE LED - Cathode pin
16	PA7	BAT_LED_R	Battery - RED LED - Cathode pin
17	PA8	RELAY	RELAY MOSFET driver Gate Input Open drain driver with Drain pin of MOSFET exposed on a connector
18	PA9 / USART1_TX	UART_TX1	SE868K3AL RX0 input pin
19	PB2	GEN_LED_G	Location - GREEN LED - Cathode pin
20	VDD	3VDC	3VDC
21	RF1	RF1	Bluetooth PCB antenna via matching network
22	VSSRF	GND	System Ground
23	VDDRF	3VDC	3VDC
24	OSC_OUT	OSC_OUT	32 MHz crystal
25	OSC_IN	OSC_IN	32 MHz crystal
26	AT0	ATO	Not connected
27	AT1	AT2	Not connected
28	PB0	INT1	INT1 interrupt output of LIS3DH Accelerometer
29	PB1	GPS_ENABLE	Enable input of power gating MOSFET for SE868K3AL GNSS module Making this pin high provides 3VDC to SE868KAL module
30	PE4	RELAY1	Not connected
31	VFBSMPS	VFBSMPS	3VDC
32	VSSSMPS	GND	System Ground
33	VLXSMPS	VLXSMPS	3VDC
34	VDDSMPS	VDDSMPS	3VDC
35	VDD	3VDC	3VDC
36	PA10 / USART1_RX	UART1_RX1	SE868K3AL TX0 output pin
37	PA11	GSM_ENABLE	Enable input of power gating MOSFET for SIM7600x LTE module Making this pin high provides ~4VDC to SIM7600x module
38	PA12	GEN_LED_R	Location - RED LED - Cathode pin
39	PA13 / JTMS_SWDIO	SWDIO	Debug connector SWDIO lines J60 pin no 3 J56 pin no 8
40	VDDUSB	VDDUSB	3VDC
41	PA14 / JTMS_SWCLK	SWCLK	Debug connector SWDIO lines J60 pin no 2 J56 pin no 7
42	PA15	SOS	Tactile switch input Pulled up, filtered and Active LOW
43	PB3	BAT_LED_B	Battery - BLUE LED - Cathode pin
44	PB4	TPS_ENABLE	Enable input of switching regulator TPS54240 Making this pin high powers the system via VCHG connector. Not connected by default as it will cause system into reset loop if no alternate backup battery power available
45	PB5	BAT_LED_G	Battery - BLUE LED - Cathode pin
46	PB6 / I2C1_SCL	IIC_CLK	I2C clock of LIS3DH Accelerometer and M24M01 EEPROM
47	PB7 / I2C1_SDA	IIC_DATA	I2C data of LIS3DH Accelerometer and M24M01 EEPROM
48	VDD	3VDC	3VDC