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