55 lines
1.3 KiB
Markdown
55 lines
1.3 KiB
Markdown
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## Exercise 02: OLED Display
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This exercise demonstrates multiple OLED rendering patterns on the LilyGO T-Beam Supreme (SH1106).
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The firmware runs 3 demos in sequence, then shows a restart banner and repeats forever.
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## Demo Sequence
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### Demo 1: Scrolling Text
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- Shows `Hello #<n>` lines.
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- New lines are added below prior lines.
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- Up to 5 lines are visible; old lines roll off the top.
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### Demo 2: Fill Then Erase
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- Displays `Count 1` through `Count 10`.
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- Shows a short `Clearing screen...` message.
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- Erases the OLED to demonstrate explicit clear behavior.
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### Demo 3: Multi-Page Rotation
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- Rotates through 3 distinct text pages.
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- Each page has different content/layout to demonstrate refresh transitions.
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- Includes a changing packet counter field on one page.
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### Restart Banner
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- Shows `Restarting 3 demos` for 5 seconds.
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- Sequence restarts at Demo 1.
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## Expected Serial Output
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Serial output (115200) prints phase changes, for example:
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- `Demo 1/3: scrolling Hello #`
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- `Demo 2/3: clear screen after 10`
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- `Demo 3/3: three-page rotation`
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- `Restarting 3 demos`
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### Build
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From this directory:
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```bash
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source /home/jlpoole/rnsenv/bin/activate
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pio run -e node_a
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```
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### Upload
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Set your USB port:
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```bash
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source /home/jlpoole/rnsenv/bin/activate
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pio run -e node_a -t upload --upload-port /dev/ttyACM0
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```
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### Serial Monitor
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```bash
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screen /dev/ttyACM0 115200
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```
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