This week, we made good progress on getting more continuous and accurate GPS data. We were able to receive an external GPS piece, called the Adafruit breakout GPS. Having an external GPS connected with our notecard allows us to simultaneously collect GPS data while keeping a cellular connection going. This can be super useful, for when we’re in areas that don’t have good wifi signal, we can depend on using the notecards cellular data to receive any API requests. It also allows us to get a more continuous stream of GPS data, which allows our location to be a bit more precise. I was also able to get the logic working that allows for our GPS to continuously run and update a file that’s being read from for our navigation system to work functionally. This connection would allow for a semi-working version of our navigation system.
For the haptic feedback subsystem, code was written for the sensor script so it can send a signal to the HC-05 when an object is detected within a certain range. We haven’t been able to test it due to a road block with configuring the HC-05 bluetooth modules. We are facing issues with establishing connection between to the two HC-05 modules because we have been unable to get a response from them individually using AT Commands on the Micro Arduino. The AT Commands are needed to sync the modules and dictate which one is the “master”. We’ve tried various solutions I’ve seen online but will now pivot to trying to configure the HC-05 with the RPi4 instead because this seems to be a common issue with the micro Arduino.
Additionally, Completed integrating the navigation logic to the Raspberry Pi 4 system and began work to join the GPS and navigation subsystems together. Also, began testing different locations for the speech recognition part of the project.
RISK:
In regards to the GPS subsystem, there’s a risk of the GPS not having a clear view of the sky, if we have it in some sort of box, so we might need an external antenna that would have a clear view of the sky to get the most accurate GPS data.
Considering the issues we’ve had with configuring the bluetooth network, there’s a major risk to the integrity of the system if objects are detected by the sensor but users aren’t warned through the vibration of the wristband. It’s important to establish this communication between systems using the HC-05 as soon as possible in order to reach the requirements for the system.
NEXT WEEK DELIVERABLES:
We are primarily focused on completing our 3 different subsystems in preparation for the interim demos. Then, the rest of the week will be spent testing the individual subsystems before beginning integration.