# 2. V2 GNSS (NEO-M8N) MAG BARO hardware [revision 2.3.2]
This page covers hardware-specific details of GNSS module witch also includes magnetometer and barometer. For general information, see 1. General, for software related details see Cyphal interface or DroneCAN interface.
# 2.1. Features
- Concurrent reception of GPS, GLONASS, Galileo and BeiDou
- Centimeter-level accuracy in a small and energy-efficient module
- Easy integration
- Magnetometer RM3100 (opens new window)
- Baro BMP280 (opens new window)
- 2 JST SM04B connectors compatible with Dronecode Autopilot Connector Standard (opens new window)
- 1 MOLEX (opens new window) non standart connector
- GNSS module NEO-M8N (opens new window)
- RHCP Ceramic GPS Antenna (1461680001) (opens new window)
# 2.2 Wiring
Schematic features. Schematic can be provided via issue.
The node has 3 connectors which are described in the table below.
|1||CAN1, CAN2||Devices that deliver power to the bus are required to provide 4.5–5.5 V on the bus power line, 5.0 V nominal. Devices that are powered from the bus should expect 4.5–5.5 V on the bus power line. The current shall not exceed 1 A per connector.|
|2||SWD||STM32 firmware updating using programmer-sniffer.|
|3||CAN3||Can be powered from 5.5 to 30 volts and connected to CAN.|
|4||UART||Can be used to setup the GPS module|
Here (opens new window) you can find manufacturer part number of connectors it self and its mates.
Pin configuration and functions
|3||CAN High||3||CAN Low||SWDIO||RXI|
Here you can see all connections of MCU.
# 2.3. Specifications
Scheme is shown on the picture below. CAN model can be provided via email request or issue on github or downloaded on GrabCAD (opens new window).
|Width, mm||Length, mm||Height, mm|
Total weight of device less than 50 g.
Information about case presented here.
Absolute Maximum Ratings
|V (CAN2, CAN3)||4.5||5.5||V|
*Noted Voltage should be delivered only with current limitation under 2.5 Amp.
Recommended operating conditions
|V (CAN1, CAN2)||5||V|
|Human-body model (HBM)||2000||V|
|Charged-device model (CDM)||500||V|
# 2.4. Integration
Recommended mechanical mounting
Connection example diagram
# 2.5. Power Supply Recommendations
Device is designed to operate from an input voltage supply range between 4.5 V and 5.5 V over CAN2 or CAN3 connector, or 5.5 - 30 V from CAN1. This input supply must be able to withstand the maximum input current and maintain a stable voltage. The resistance of the input supply rail should be low enough that an input current transient does not cause a high enough drop that can cause a false UVLO fault triggering and system reset. The amount of bulk capacitance is not critical, but a 47-μF or 100-μF electrolytic capacitor is a typical choice.
# 2.6. Revision history
|The board is on the testing stage. |
- Migrate to stm32g0 from stm32f103
27 Mar, 2023
|The latest stable version. |
- Timepulse and EXTINT pin wired to connector CC and connected to MCU
- Slightly increase the board size
- Fix UART connector
|v2.3.2 (opens new window) |
Oct 14, 2022
|The version of the board with a small bug on UART connector. It is not on production. |
- Integrate RM3100 in PCB
- Assign SS pin to PA2
- Add UART connector with wrong pinout!!!
- Use RGB LEDs instead of address LEDs
Aug 10, 2021
|The first stable version. Do not use it in a new design. |
- Ingegrage RM3100
- Assign SS pin to PA4 (so RM3100 doesn't work on the lastest firmware)
- Address LEDs (so they don't work on the lastest firmware)