This post will be the first in a series following the progress of building a motorhome controller powered by a Raspberry Pi.
Although primarily a controller for the motorhome, the Pi will also act as a WiFi access point, media centre, and as a catch all for handling anything technical.
A high level overview of requirements should include the following but I’m sure more will be added along the way.
- Voltage and amp sensors to monitor vehicle and leisure batteries, ignition and handbrake usage, and detecting 240V hookup power.
- Water level sensors for fresh and grey tanks.
- Temperature and humidity sensors.
- GPS for location tracking, getting/setting the time when no network is available (the Pi doesn’t have a Real Time Clock).
- Relay board for controlling lights, fans, inverter, water pump etc.
- Accelerometer, I have one laying around so may as well use it, possibly to monitor the current angle of the vehicle.
Control Panel / Web Interface
- Controlling and monitoring the sensors should be quick and easy to do through a touchscreen control panel.
- The control panel should also be available as a web interface for use on handheld devices when away from the motorhome.
- Should be able to control not just the sensors but also the WiFi, media, and display the weather forecast for the current location.
- The built in WiFi will provide an access point for devices to connect to.
- A second WiFi card with high gain external antennas will be able to connect to external networks and share the connection internally.
- When no external WiFi is available it will fallback to mobile data, this should be done automatically and shouldn’t need user intervention.
- Bluetooth connectivity in order to play audio through an amp and speakers.
- Option to play video content on a 4k monitor.
- Additional media options to be explored once the more important tasks have been completed.
This section will be updated with links to further content as it’s written.
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