makeflyeasy PixSurveyA1

../_images/PixSurveyA1.jpg

Specifications

  • Processor:
    • 32-bit STM32F427VIT6 ARM Cortex M4 core with FPU
    • 168 Mhz/256 KB RAM/2 MB Flash
    • 32-bit failsafe co-processor (STMF103)
  • Sensors
    • Three redundant IMUs (accels, gyros and compass)
    • Gyro/Accelerometers: ICM20948 or MPU9250, ICM20602, MPU6000
    • Barometers: Two redundant MS5611 barometers
    • Compass: AK8960 or AK09916
  • Power
    • Redundant power supply with automatic failover
    • Power supply 4.8V-5.8V
  • Interfaces
    • 14x PWM servo outputs (8 from IO, 6 from FMU)
    • S.Bus servo output
    • R/C inputs for CPPM, Spektrum / DSM and S.Bus
    • 5x general purpose serial ports
    • 2x I2C ports
    • 2x CAN Bus interface
    • MicroSD card reader
    • Type-C USB
    • High-powered piezo buzzer driver (on expansion board)
    • Safety switch / LED
  • Dimensions
    • Weight 117g
    • Size 110mm x 100mm x 23mm

UART Mapping

  • SERIAL0 -> console (primary mavlink, usually USB)
  • SERIAL1 -> USART2 (telem1)
  • SERIAL2 -> USART3 (Telem2) RTS/CTS pins
  • SERIAL3 -> UART4 (primary GPS)
  • SERIAL4 -> UART8 (GPS2)

Connector pin assignments

TELEM1, TELEM2 ports

Pin Signal Volt
1 VCC +5V
2 TX (OUT) +3.3V
3 RX (IN) +3.3V
4 GND GND

I2C1, I2C2 port

PIN SIGNAL VOLT
1 VCC +5V
2 SCL +3.3V
3 SDA +3.3V
4 GND GND

CAN1, CAN2 port

PIN SIGNAL VOLT
1 VCC +5V
2 CAN_H +12V
3 CAN_L +12V
4 GND GND

Safety port

PIN SIGNAL VOLT
1 VCC +5V
2 LED +3.3V
3 SafKey +3.3V

GPS1/I2C1, GPS2/I2C2 ports

PIN SIGNAL VOLT
1 VCC +5V
2 TX +3.3V
3 RX +3.3V
4 SCL +3.3V
5 SDA +3.3V
6 GND GND

Power1, Power2 ports

PIN SIGNAL VOLT
1 VCC +5V
2 VCC +5V
3 CURRENT +3.3V
4 VOLTAGE +3.3V
5 GND GND
6 GND GND

RC Input

The PPM/SBus.in pin, which by default is mapped to a timer input, can be used for all ArduPilot supported receiver protocols, except CRSF which requires a true UART connection. However, bi-directional protocols which include telemetry, such as SRXL2 and FPort, when connected in this manner, will only provide RC without telemetry.

To allow CRSF and embedded telemetry available in Fport, CRSF, and SRXL2 receivers, a full UART, such as SERIAL4 (UART8) would need to be used for receiver connections. Below are setups using UART4. SERIAL4_PROTOCOL should be set to “23”.

Any UART can be used for RC system connections in ArduPilot also, and is compatible with all protocols except PPM. See Radio Control Systems for details.

PWM Output

The PixSurveyA1 supports up to 14 PWM outputs. All 14 outputs support all normal PWM output formats. All FMU outputs (9-14) support DShot.

The 6 FMU outputs are in 4 groups:

  • Outputs 9, 10, 11 and 12 in group1
  • Outputs 13 and 14 in group2

FMU outputs within the same group need to use the same output rate and protocol. If any output in a group uses DShot then all channels in that group need to use DShot.

Battery Monitor Settings

These should already be set by default. However, if lost or changed:

Enable Battery monitor with these parameter settings :

BATT_MONITOR =4

Then reboot.

BATT_VOLT_PIN 2

BATT_CURR_PIN 3

BATT_VOLT_MULT 18

BATT_AMP_PERVLT 24

BATT2_VOLT_PIN 13

BATT2_CURR_PIN 14

BATT2_VOLT_MULT 18

BATT2_AMP_PERVLT 24

Where to Buy

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