60198-cargo-train: Update project.

sets/city/60198-cargo-train/README.md

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+---
+permalink: /projects/sets/city/60198-cargo-train/
+title: "Cargo train"
+image:
+    local: "60198-cargo-train.jpg"
+    credit: "LEGO"
+layout: set
+description: "Python projects that apply to most modern LEGO trains."
+---

sets/city/60198-cargo-train/slope-detection/README.md

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+---
+permalink: /projects/sets/city/60198-cargo-train/slope-detection/
+title: "Train slope detection"
+maintainer:
+    user: "pybricks"
+    name: "The Pybricks Authors"
+image:
+    local: "slope-detection.jpg"
+video:
+    youtube: "https://www.youtube.com/embed/Wc0mRIBjhIU"
+description:
+    "Detect the slope of the track. This lets you determine where the train
+     is on the circuit."
+building_instructions:
+    external: https://www.lego.com/en-us/service/buildinginstructions/60198
+---
+
+## Building instructions
+Build the train using the standard instructions. Mount the
+[tilt sensor][tiltsensor]
+horizontally in the train, with the cable side facing towards direction of
+driving:
+
+![](sensor-placement.jpg)
+
+Connect the motor to port A and connect the tilt sensor to port B.
+
+## Coding Instructions
+
+
+
+This program makes the train drive until it detects a slope of 8 degrees or
+more. Then it drives back down.
+
+```python
+{% include_relative main.py %}
+```
+
+## Programming and running instructions
+The train must start on a horizontal track. Then run the program.
+
+[tiltsensor]: https://docs.pybricks.com/en/latest/pupdevices/tiltsensor.html
+

sets/city/generic/slope_detection/README.md

@@ -1,34 +0,0 @@
-# Rail slope detection
-
-Made by: The Pybricks Authors
-
-## Introduction
-
-This project shows how you can integrate the
-[Tilt Sensor][tiltsensor]
-in your LEGO trains. You can use this sensor to detect a slope in the rail
-track.
-
-## Demo
-
-This program makes the train drive until it detects a slope of 8 degrees or
-more. Then it drives back down. You can watch a video
-[here](https://www.youtube.com/watch?v=Wc0mRIBjhIU).
-
-## Requirements
-- Generic LEGO train, such as 60197 or 60198
-- Powered Up [Tilt Sensor][tiltsensor]
-
-## Building instructions
-Build the train using the standard instructions. Mount the Tilt Sensor anywhere
-on the train. See the video for an example. Mount it horizontally. The side
-with the cable should face towards the front: in the direction of driving.
-
-## Ports
-- Train motor on port A 
-- Tilt sensor on port B
-
-## Programming and running instructions
-The train must start on a horizontal track. Then run the program.
-
-[tiltsensor]: https://docs.pybricks.com/en/latest/pupdevices/tiltsensor.html