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telemetry system

AI Source Code

1.0.0

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Telemetry System

This is a project for transmitting telemetry for a balloon, rocket and other things that can fly high.

The project consists of:

Ground station (RX)
Transmitting module (TX)

Ground station (RX)

Block diagram

This is a module that includes one PCB:

LoRa transceiver (E19-868M30S) - 1W power output
MCU STM32F405
OLED display
Lipo charging chip
Data loger - logging of received information to MicroSD

The display is only needed to display service information, all telemetry is transmitted to a PC via USB to display telemetry in a GUI application, transmission of control commands for the rocket

For details see WiKi - Ground station (RX)

Transmitting module (TX)

Block diagram

This is a module that includes separate PCB modules for scalability:

GPS module (Matek M8Q) and SMA connectors for antennas
TX module: LoRa transceiver (E19-868M30S) - 1W power output, MCU STM32F405, logging data to MicroSD card (black box)
IMU module ( acc, gyro, pressure, sensor )
Servo module - to control flight stabilization (MCU STM32F405)
Power module - for power supply of all modules

For details see WiKi - Transmitting module (RX)

Protocol specifications

In order not to reinvent the "wheel", the UBX protocol was taken as basis and simplified for the current requirements:

simplicity
scalability
short messages to minimize air latency

In protocol not included ACK and NAK - since this is an overhead in time, if the parcel was not received by the ground station, it's okay, we will received the next message, but will not waste time transmitting package: "success received"

It consists of six blocks, as shown in the picture

You can read more information here WiKi page - Protocol specifications

How to build

Depends: gcc-arm-none-eabi cmake

mkdir build
cd build
cmake -DBUILD=GROUND_STATION ..
make -j
make clean
cmake -DBUILD=TX_MODULE ..
make -j
make clean
cmake -DBUILD=SERVO_MODULE ..
make -j