Location: West of Forest Grove, OR
Basic Equipment and Configuration:
- Raspberry Pi 1.0 Rev B SBC
- TNC-X connected via USB
- Motorola GM300 VHF radio
- APRX running 2-second viscous digipeater and igate
The SSADDL digipeater is a viscous digipeater. That means that it uses a small delay to listen for other echoes before deciding to digipeat a packet. This helps avoid the case where multiple digipeaters in an area waste bandwidth by all echoing the same packet multiple times. The SSADDL digipeater will only digipeat a package if it hears the packet, and no other digipeaters in the area repeat it.
The SSADDL digipeater is also an iGate, when it is able. It achieves this via a 1.2GHz Hi-Speed D-STAR link to the OCRG installation at Mt. Hebo. This link provides a 64kbit IP path between the two mountains, which allows SSADDL access to the internet in order to iGate the packets that it hears. Click here for digipeater and iGate statistics for the machine.
The IP link provides internet connectivity to the digipeater, as well as the PTZ IP camera located on one of the towers. The image above from the camera is updated every 30 minutes over the link.
Over the winter an unrotated log file filled the root of the digi, rendering it unable to perform. We went up and fixed this, and updated to the latest version of APRX. We also upgraded the network configuration, finished some grounding we were unable to complete the first time, and installed an pan/tilt IP camera.