add oled-arm

oled/Dockerfile

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+#
+# Dockerfile for oled
+#
+
+FROM easypi/alpine-arm
+MAINTAINER EasyPi Software Foundation
+
+RUN set -xe \
+    && apk add --no-cache build-base \
+                          curl \
+                          linux-headers \
+                          python \
+                          python-dev \
+                          freetype \
+                          freetype-dev \
+                          jpeg \
+                          jpeg-dev \
+    && curl https://bootstrap.pypa.io/get-pip.py | python \
+    && pip install luma.oled \
+    && apk del --purge build-base \
+                       curl \
+                       linux-headers \
+                       python-dev \
+                       freetype-dev \
+                       jpeg-dev
+
+ENTRYPOINT ["python"]

oled/README.md

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+oled
+====
+
+## Demo
+
+```
+OLED Pin | Name | Remarks | RPi Pin |  RPi Function
+---------+------+---------+---------+--------------
+1        | GND  | Ground  | P01-6   |  GND
+2        | VCC  | +3.3V   | P01-1   |  3V3
+3        | SCL  | Clock   | P01-5   |  GPIO 3 (SCL)
+4        | SDA  | Data    | P01-3   |  GPIO 2 (SDA)
+```
+
+```bash
+# Show "hello world" on oled display module
+$ cat demo.py | docker-compose run --rm oled
+```
+
+## Todo
+
+- [ ] Implement RESTful API

oled/demo.py

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+#!/usr/bin/env python
+
+from luma.core.interface.serial import i2c
+from luma.core.render import canvas
+from luma.oled.device import ssd1306
+
+serial = i2c(port=1, address=0x3C)
+device = ssd1306(serial)
+device.cleanup = lambda _: None
+
+with canvas(device) as draw:
+    draw.rectangle(device.bounding_box, outline="white", fill="black")
+    draw.text((30, 40), "Hello World", fill="white")

oled/docker-compose.yml

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+oled:
+  image: easypi/oled-arm
+  devices:
+    - /dev/i2c-1