[docs] Polishing the documentation

- Remove defunct Twitter Account.
- Fix dead links.
- Replace system overview graphic.

docs/mkdocs.yml

@@ -49,8 +49,6 @@ extra:
   social:
     - icon: fontawesome/brands/github-alt
       link: https://github.com/modm-io
-    - icon: fontawesome/brands/twitter
-      link: https://twitter.com/modm_embedded
 
 markdown_extensions:
   - markdown.extensions.admonition

docs/src/how-modm-works.md

@@ -13,16 +13,15 @@ specifically for your targets and needs and generate a custom library.
 You can generate more than just code, in this example, lbuild also generates a
 build system which then compiles and links the application into a executable.
 
-<style scoped>@media(prefers-color-scheme:dark){img{filter:invert(100%)}}</style>
-![](images/system_overview.png)
+<center>
+![](images/system-overview.svg)
+</center>
 
 We've also put a lot of thought into modm-devices, about what data to extract,
 how to format and store it. We automated the entire process to get the high
 quality data we use to build our library.
 You can read all [about modm-devices in this blog post](http://blog.salkinium.com/modm-devices).
 
-![](http://blog.salkinium.com/assets/dfg_architecture.png)
-
 
 ## modm is highly modular
 

docs/src/images/system-overview.dot

@@ -0,0 +1,31 @@
+digraph dependencies
+{
+	bgcolor = transparent;
+	rankdir = LR;
+	subgraph modm
+	{
+		label = "modm";
+		node [style=filled, shape=box];
+
+		modm_config [label="Config", style="filled,solid", fillcolor=lightsalmon];
+		modm_application [label="Application", style="filled,solid", fillcolor=lightsalmon, rank=1];
+
+		modm_lbuild [label="lbuild", style="filled,solid", fillcolor=lightblue];
+		modm_modules [label="modm", style="filled,solid,bold", fillcolor=lightblue];
+		modm_devices [label="Database", style="filled,solid", fillcolor=lightblue];
+
+		modm_build_system [label="Build System", style="filled,solid", fillcolor=lightgreen];
+		modm_custom_library [label="C++ Library", style="filled,solid", fillcolor=lightgreen];
+		modm_build_artifacts [label="Build Artifacts", style="filled,solid", fillcolor=lightgreen];
+	}
+	modm_config -> modm_lbuild [constraint=false];
+
+	modm_lbuild -> modm_modules;
+	modm_devices -> modm_modules [constraint=false];
+	modm_modules -> modm_build_system;
+	modm_modules -> modm_custom_library;
+
+	modm_application -> modm_build_system;
+	modm_custom_library -> modm_build_system [constraint=false];
+	modm_build_system -> modm_build_artifacts;
+}

examples/README.md

@@ -107,10 +107,10 @@ Here are some additional examples of displays and sensors we like:
 
 - [SSD1306 OLED display](https://github.com/modm-io/modm/blob/develop/examples/stm32f4_discovery/display/ssd1306/main.cpp): Draws text and graphics onto I2C display.
 - [BMP085/BMP180 barometer](https://github.com/modm-io/modm/blob/develop/examples/stm32f4_discovery/barometer_bmp085_bmp180/main.cpp): Reads atmospheric pressure and temperature from I2C sensor.
-- [BMP180/BME280 barometer](https://github.com/modm-io/modm/tree/develop/examples/stm32f103c8t6_blue_pill/environment): Reads atmospheric pressure and temperature from multiple I2C sensors.
+- [BMP180/BME280 barometer](https://github.com/modm-io/modm/tree/develop/examples/blue_pill/environment): Reads atmospheric pressure and temperature from multiple I2C sensors.
 - [VL6180 time-of-flight distance sensor](https://github.com/modm-io/modm/blob/develop/examples/stm32f4_discovery/distance_vl6180/main.cpp): Reads distance and ambient light from I2C sensor.
 - [VL53L0  time-of-flight distance sensor](https://github.com/modm-io/modm/tree/develop/examples/nucleo_f401re/distance_vl53l0/main.cpp): Much improved version of the VL6180 sensor.
-- [ADNS9800 motion sensor](https://github.com/modm-io/modm/tree/develop/examples/stm32f103c8t6_blue_pill/adns_9800/main.cpp): Reads 2D motion from SPI sensor used in gaming mice.
+- [ADNS9800 motion sensor](https://github.com/modm-io/modm/tree/develop/examples/blue_pill/adns_9800/main.cpp): Reads 2D motion from SPI sensor used in gaming mice.
 - [TCS3414 color sensor](https://github.com/modm-io/modm/blob/develop/examples/stm32f4_discovery/colour_tcs3414/main.cpp): Reads RGB color from I2C sensor.
 - [HD44780 over I2C-GPIO expander](https://github.com/modm-io/modm/blob/develop/examples/stm32f4_discovery/display/hd44780/main.cpp): Draws text via native GPIO port or I2C-GPIO expander port onto character display.