microReticulumTbeam/exercises/02_oled_display

Exercise 02: OLED Display

This exercise demonstrates multiple OLED rendering patterns on the LilyGO T-Beam Supreme (SH1106).

The firmware runs 3 demos in sequence, then shows a restart banner and repeats forever.

Demo Sequence

Demo 1: Scrolling Text

• Shows Hello #<n> lines.
• New lines are added below prior lines.
• Up to 5 lines are visible; old lines roll off the top.

Demo 2: Fill Then Erase

• Displays Count 1 through Count 10.
• Shows a short Clearing screen... message.
• Erases the OLED to demonstrate explicit clear behavior.

Demo 3: Multi-Page Rotation

• Rotates through 3 distinct text pages.
• Each page has different content/layout to demonstrate refresh transitions.
• Includes a changing packet counter field on one page.

Restart Banner

• Shows Restarting 3 demos for 5 seconds.
• Sequence restarts at Demo 1.

Expected Serial Output

Serial output (115200) prints phase changes, for example:

• Demo 1/3: scrolling Hello #
• Demo 2/3: clear screen after 10
• Demo 3/3: three-page rotation
• Restarting 3 demos

Build

From this directory:

source /home/jlpoole/rnsenv/bin/activate
pio run -e node_a

Upload

Set your USB port:

source /home/jlpoole/rnsenv/bin/activate
pio run -e node_a -t upload --upload-port /dev/ttyACM0

Serial Monitor

screen /dev/ttyACM0 115200