OrbiMote :: Hardware

Schematics

• Done with Eagle 7.7 Express.

Bill of material

• IMST iM880A
  • MCU: STM32L151CB - 128K FLASH, 10K RAM, Timers, SPI, I2C, USART, USB 2.0 full-speed device/host/OTG controller,DAC, ADC, DMA
  • RADIO: SX1272
• or IMST iM880B-L
• or IMST iM881A-M
• MPL3115 : temperature, pressure
• MMA8451 : accelormeter
• MAG3110 : magnetometer
• reed switch
• button
• power switch
• SMA and UFL antenna connectors
• CR2032 battery holder
• plug for AA lithium battery
• pin header for JTAG/SWD
• pin header for RXTX

Header for JTAG/SWD

Noted as JP1

Pin 1 : GND
Pin 2 : VCC
Pin 3 : JTCK/SWCLK (pin 2 of the iM880a)
Pin 4 : JTMS/SWDAT (pin 3 of the iM880a)
Pin 5 : JTDO       (pin 4 of the iM880a)
Pin 6 : JTDI       (pin 5 of the iM880a)
Pin 7 : RESET      (pin 7 of the iM880a)

Header for RXTX

Noted as JP2

Pin 1 : GND
Pin 2 : RX
Pin 3 : TX

GNSS additional modules for near-space applications

According CoCom regulations, most of commercial GPS modules stop at altitudes higher than 18000 meters and for speeds higher than 1000 knots (1852 km/h).

Here is a list of GPS modules : gnss_modules.md

Barometers for near-space applications

Here is a list of barometer components and modules : barometers.md