Inspired the work of @stetro.

• SSD1306 based oled display
• ESP32/ESP8266 microcontroller
• python
• micropython firmware

Clone the repository. Insert ssid / wpa-key information into config.py. Set correct I2C settings (pins) for OLED_I2C in config.py.

STOP_ID in config.py is currently pointing at a stop in Kamppi, Helsinki. Change it as appropriate.

Setup a python virtualenv and install esptool and adafruit-ampy into it.

• ampy
• esptool

Download MicroPython firmware from here and install the firmware using esptool, as per instructions on the MicroPython site.

Copy the python files from this repo to the microcontroller using ampy. The order is somewhat significant, the following order should work (change the /dev/ttyUSB0 device to whatever you have):

ampy -p /dev/ttyUSB0 config.py
ampy -p /dev/ttyUSB0 utils.py
ampy -p /dev/ttyUSB0 qry.py
ampy -p /dev/ttyUSB0 time_utils.py
ampy -p /dev/ttyUSB0 ssd1306.py
ampy -p /dev/ttyUSB0 boot.py