PAYLOAD - Norco College Rocketry

This is the code for the payload section by Norco College Rocketry.
There is a pi zero in the nosecone acting as a wireless access point for the three raspberry pi boards below in payload proper. There is also an arduino on the ground connected to a radio transceiver.

Getting Started

The repository is broken down by the python code (.py files) in the code directory.
There are libraries and tutorials required to set up each pi, located below, along with which sensors are being utilized.

Raspberry Pi Zero

This one is a little more involved.

MQTT

This is how our server/client communicate.

sudo apt-get install -y mosquitto mosquitto-clients
sudo systemctl enable mosquitto
sudo systemctl status mosquitto
sudo pip install paho-mqtt

You can test if it is working locally with there 2 in 2 different terminals:

mosquitto_sub -h localhost -t "test/message"
mosquitto_pub -h localhost -t "test/message" -m "Hello, world"

Here are the tutorials I used:
https://tutorials-raspberrypi.com/raspberry-pi-mqtt-broker-client-wireless-communication/
https://appcodelabs.com/introduction-to-iot-build-an-mqtt-server-using-raspberry-pi

Here is a good reference https://pypi.org/project/paho-mqtt/

Wireless access point

Follow this raspberry pi official tutorial to get it working
https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md

RFM96W -> 433 MHz radio transceiver [x1]

DS18B20 -> temp probe [x1]

strain gague [x1]

ADS1115 -> analog to digital converter [x1]

Raspberry Pi 1

BNO055 -> accelerometer 1 [x1]

sudo pip3 install adafruit-circuitpython-bno055

MMA8451 -> accelerometer 2 [x3]

sudo pip3 install adafruit-circuitpython-mma8451

TCA9548A -> Multiplexer [x1]

sudo pip3 install adafruit-circuitpython-tca9548a

Raspberry Pi Camera

Here is the GitHub link for the reference code
https://github.com/adafruit/Adafruit_CircuitPython_TCA9548A
Here is a useful link for the multiplexer
https://github.com/adafruit/Adafruit_CircuitPython_TCA9548A

Raspberry Pi 2

DS18B20 -> temp probe [x4]

sudo pip3 install adafruit-circuitpython-onewire
sudo pip3 install adafruit-circuitpython-ds18x20 

ADS1115 -> analog to digital converter [x2]

sudo pip3 install adafruit-circuitpython-ads1x15

strain gague [x2]

Raspberry Pi 3

BMP388 -> altitude, pressure, temp [x1]

sudo pip3 install adafruit-circuitpython-bmp3xx

BME280 -> temp, pressure, humidity [x1]

sudo pip3 install adafruit-circuitpython-bme280

SGP30 -> CO2 [x1]

sudo pip3 install adafruit-circuitpython-sgp30

Arduino

Combined with an RFM96W, our Arudino acts as a remote interface to our Raspberry Pis abord the rocket. Code for the Arduino can be found in ShiroRiri/rfm96w-repl