Stock Market Data on a Inky pHat / Raspberry Pi Zero W

Raspberry Pi Zero W

I installed the Flatpak version of the Raspberry Pi Imager on my Linux Desktop and used it to write the Raspberry Pi OS Lite 2021-10-30-raspios-bullseye-armhf-lite.zip image to a microSD card.

Mount the boot directory on the microSD card and enable SSH:

touch /mnt/boot/ssh

Enable Wifi by creating the wpa_supplicant.conf file in the boot directory with the following:

country=US
update_config=1
ctrl_interface=/var/run/wpa_supplicant
network={
    ssid="YOURSSID"
    psk="YOURPASSWORD"
    scan_ssid=1
}

Boot the Raspberry Pi Zero W with the Raspberry Pi OS Lite microSD card:

ssh pi@raspberrypi.local
<default password is "raspberry">
passwd
sudo apt update
sudo apt upgrade

Inky pHat Stock Market Setup

Set Timezone and enable the SPI interface to the Inky pHat:

sudo raspi-config
    5 Localisation Options --> L2 Timezone --> America/<CITY>
    3 Interface Options --> P4 SPI --> Yes
ls /dev/spi*   <-- should see /dev/spidev0.0 and /dev/spidev0.1

Use a Python Virtual Environment and upgrade pip packages:

sudo apt install python3-venv
python3 -m venv --system-site-packages ~/inkyphat-env
source ~/inkyphat-env/bin/activate

Download and use this Git Repository:

sudo apt install git
git clone https://github.com/bgant/inkyphat-stockmarket
cd ~/inkyphat-stockmarket

Install Python packages in virtual environment using pip:

python3 -m pip install -r requirements.txt
sudo apt install libatlas-base-dev libopenjp2-7

Initialize and Configure Scripts:

python3 inkyphat-stockmarket.py    <-- First run creates your own inkyphat-stockmarket.ini file
vi inkyphat-stockmarket.ini
    api = <YOUR API KEY>           <-- Sign up for Free API key at https://finnhub.io
    exchange_hours = disabled      <-- For testing when market is closed
python3 inkyphat-stockmarket.py    <-- Display should show the last Dow Jones Index price
deactivate                         <-- Exit Python virtual environment

Update the Inky pHat display every 5 Minutes when the Stock Market is open:

vi inkyphat-stockmarket.ini
    exchange_hours = enabled
sudo vi /etc/crontab
    */5 * * * 1-5 pi nice /home/pi/inkyphat-env/bin/python3 /home/pi/inkyphat-stockmarket/inkyphat-stockmarket.py > /dev/null 2>&1 &
sudo reboot

More Information:

• Getting Started with Inky pHAT
• Getting Started with the Raspberry Pi Zero Wireless
• Inky pHAT Pinout