Power. Both battery-level and 3.3V regulated power are
available. Note that the amount of regulated power is not
huge; TeleMetrum contains a 150mA regulator and uses, at
peak, about 120mA or so. For applications needing more than
a few dozen mA, placing a separate regulator on them and
using the battery for power is probably a good idea.
Power. Both battery-level and 3.3V regulated power are
available. Note that the amount of regulated power is not
huge; TeleMetrum contains a 150mA regulator and uses, at
peak, about 120mA or so. For applications needing more than
a few dozen mA, placing a separate regulator on them and
using the battery for power is probably a good idea.
SPI. The flight computer operates as a SPI master, using
a protocol defined in this document. Companion boards
provide a matching SPI slave implementation which supplies
telemetry information for the radio downlink during flight
SPI. The flight computer operates as a SPI master, using
a protocol defined in this document. Companion boards
provide a matching SPI slave implementation which supplies
telemetry information for the radio downlink during flight
This section first defines the command message format sent from
the flight computer to the companion board, and then the various
reply message formats for each type of command message.
This section first defines the command message format sent from
the flight computer to the companion board, and then the various
reply message formats for each type of command message.