Telemetry System Project Using Raspberry Pi 4: A Detailed Exposition

Parts:
Raspberry Pi Zero (or Raspberry Pi 4):
Served as the nucleus of the telemetry system.

PowerBoost 500 Basic:
Employed to energize the Raspberry Pi.

BMP388:
A fine-tuned sensor from Bosch, utilized for gauging barometric pressure and temperature.

LSM303:
A 6-DoF sensor engaged for measuring acceleration and magnetic fields.

Camera:
Employed to record video footage throughout the flight.

RFM95W:
A LoRa radio transceiver utilized for extended-range, low-power communication.

Miscellaneous:
Breadboards, wires, soldering tools, along with 3D-printed or acquired mounts were used for anchoring the electronics within the rocket.

Wiring:
The air hardware, positioned inside the rocket, and the ground hardware, instrumental in receiving the telemetry data, were connected to distinct pins on the Raspberry Pi.

Software:
The software segment encompassed scripting for data acquisition, communication, and potentially data visualization.
A sequence for launching, writing, and reading data was meticulously laid out, proving to be vital for capturing meaningful telemetry data during the rocket's flight.

Project Implementation:
Data Acquisition:
The Raspberry Pi was utilized to log flight data from the sensors onto an SD card and transmit its GPS location via cellular networks to a server.
Scripts were implemented to clear, initiate, or halt data transmission, and to replay recorded data when necessary.

Data Transmission:
A LoRa transceiver like RFM95W was employed for long-range, low-power communication between the rocket and a ground station.
A protocol was implemented for transmitting data packets from the rocket to the ground station and for acknowledging the receipt of data packets.

Data Visualization and Analysis:
Software like Processing was employed to graph the telemetry data in real-time as it was being received by the ground station.
The telemetry data was analyzed to comprehend the rocket's performance, such as its maximum altitude, speed, and acceleration.