ELEC-E8408-Hiking-Watch

Mini project from the ELEC-E8408 course, Aalto University. which consists of a TTGO-Watch-2020-V2 and a companion linux computer (Raspberry Pi)

The project is a system consisting of a smart watch (Watch) application that is able to record and display hiking trip statistics, and external device (Hub) that is able to synchronize hiking session data from the watch to store it, manage it, and display the history. The Watch and the Hub is communicating via Bluetooth by a very simple protocol.

With the Watch, the user is able to record hiking sessions, observe the current session data (step count, distance in km), and save one session locally.

The Hub will automatically synchronize to the Watch if they are nearby each other. The incoming sessions will be stored on the Hub inside a database. The Hub serves a website through which the stored session data can be observed, and individual sessions can be deleted. On top of the Hub there is an LED matrix which displays the latest session.

Hub installation guide

Dependencies

Pybluez

In order to install pybluez on an RPi, you have to install some of its dependencies.

sudo apt-get install libbluetooth-dev
sudo apt-get install python-dev
sudo pip install PyBluez

UnicornhatHD python library

To make the LED hat work, you have to install the unicornhathd python library. The library has to be installed as a super user.

sudo pip3 install unicornhathd==0.0.4

Other

The required python libraries can be installed from the hub/requirements.txt file. Assuming you are in the root of the project, run:

pip3 install -r hub/requirements.txt

Installing the Hub

git clones https://github.com/cristisulighetean/ELEC-E8408-Hinking-Watch.git

cd ELEC-E8408-Hinking-Watch/hub

sudo sh starthub.sh

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Watch installation guide

The development process of the watch firmware we recommend to be performed using PlatformIO. After opening the watch_fw as a project, make sure that the TTGO Watch library is added.

To develop and flash firmware for the watch, we will need the following elements:

- Hardware: 
    - Good quality USB Cable
    - Raspberry Pi 3B+ or a computer with at least similar performance 
- Software:
    - esptool (v3.3)

Flashing firmware to the watch

The firmware update will be published on GitHub as a binary file, and it can be flashed to the watch by using the following command:

esptool.py --chip esp32 \
	--port <PORT> \
	--baud 2000000 \
	--before default_reset \
	--after hard_reset write_flash \
	-z --flash_mode dio \
	--flash_freq 80m \
	--flash_size detect \
	0x1000 bootloader_dio_80m.bin \
	0x8000 partitions.bin \
	0xe000 boot_app0.bin \
	0x10000 firmware.bin

The remaining bootloader_dio_80m.bin, boot_app0.bin and partitions.bin files can be found under the misc folder in watch firmware.

Other

To flash your own binary, you could also use Platform IO and install the TTGO watch library, while selecting the TTGO watch as the board

Supported hardware

Hub

The hub can be any Raspberry device starting with the Pi 3

• the software was only tested on a Pi 3B+

LED Display

We are using the Unicorn Hat from Pimoroni, which fits directly to the Raspberry Pi pin header.

Watch

At the moment we only support the TTGO V2 2020 smartwatch. The V2 is only model which is supplied with the GPS module, and the main hiking fuctionality is based on it.

It can be bought from either aliexpress or from the manufacutrer's website lilygo

Project layout

Maintainers

Oliver Lagerroos
Simon Nordström
Gabor Pelesz
Cristian Sulighetean