P19104: HABIP-BioX
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Communication System Subsystem Build & Test

Table of Contents

Vision for Communication System Subsystem Level Build & Test Phase

The goal for this phase is to fully populate and test the communication system this phase. This includes:

Also the APRS will be tested as soon as it arrives.

Results of this Phase for the Communication System

The PCBs came in early on in this phase and the whole team immediately started to populate the boards in the RIT SMT lab. After a quick debug of a few parts being either wrong or orientated wrong, the board was powered on correctly and testing began.

The APRS and Baofeng UV-5RA radio arrived early on in the phase also. All of the components of the communication system are shown below.

Communication System

Communication System

Communication System Board

Communication System Board

Test Results Summary

Many aspects of the Comm Board were tested in the past few weeks. Overall, the results were positive.

Test Plan Results For Communication Board

The steps that will be used to test out the communication board are as follows:

Board Power Test

The three buck converters that step the 12V input to 5V, 5V and 7.4V respectively were tested for various permanence characteristics. The reults are in the spreadsheet below.
Board Power Test

Board Power Test

Outputs of 5V video, 5V board, and 7.4V Video Buck Converters

Outputs of 5V video, 5V board, and 7.4V Video Buck Converters

Board Signals Test

Next the signals in the communication board that come from the Raspberry Pi were tested. This was facilitated by test files that were made on the Raspberry pi.

Board Signals Test

Board Signals Test

Temperature and Pressure

Temperature and Pressure

SPI Location

SPI Location

Guide to setup the PI to SSH for Windows 10

A guide on how to setup the Raspberry Pi is linked below

Setting up the raspberry Pi for SSH for windows 10

2m Communication Test

The test that checks the functionality of the 2m Communication system hardware is shown below.
Board Signals Test

Board Signals Test

Other Communication System Tests

APRS Test

The APRS was set up to transmit the W2RIT callsign once a minute and to have a callsign ID of 11(for a High Altitude Balloon). The test document for the APRS is shown below.

APRS Test

APRS Test

The APRS successfully got GPS lock and transmitted to the 2m repeater that is on RIT from the METEOR lab and from one of the team members' house.

APRS Test

APRS Test

APRS Test

APRS Test

APRS Test

APRS Test

Future work for the APRS will involve debugging why sometimes the Arduino Leonardo chip on the APRS gets into an error state upon startup.

Master Test Results Page

The document containing all of the test plans and the results of the tests performed thus far are located here: Test Plans

Risk and Problem Tracking

Problems that were overcome was that the communication board did not power up correctly and the 7.4V output was not correct.

Problems that still exist are the APRS not booting correctly some of the time. The document will the documentation of these problems as well as the problems of the entire project are shown below.

A link to the Problem Tracking document can be found here: Problem Tracking

At this point, the main risk of the communication system is that the 2m communication may not be rugged enough if the software is not improved upon from the state it was in 2 years ago.

An updated Risk Document can be found here: Risk Document

Functional Demo Materials

The aspects of the communication system that are to be demonstrated at the end of this phase are listed below.

Comms

Plans for next phase


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