Repeater Systems: ATV | Digital Voice | EchoLink & IRLP | Repeater Rules | Weather | Meshtastic
Repeater Systems: ATV | Digital Voice | EchoLink & IRLP | Repeater Rules | Weather | Meshtastic
Meshtastic is an open-source, decentralized, off-grid mesh network. It’s made up of small communicators that can form a mesh network. These communicators can be linked to a phone via Bluetooth or Wi-Fi. Meshtastic uses inexpensive LoRa radios as a long-range communication platform.
Meshtastic is a new an emerging technology, so it's constantly changing.
Meshtastic operates in the 915mhz/33cm band under part 15 rules; with a good portion of operations being hams. There is a large amount of information on the official Meshtastic website.
Want to get started with meshtastic? We recommend you start with the Bayme.sh getting started guide. The recommended hardware is a great place to start if you're looking for hardware.
Quick tips for using the mesh in the bay area:
Most of the SF Bay is on the MediumSlow preset with some testing in the south bay on MediumFast and Sacrament is mixed on LongFast and MediumSlow.
Use the Bayme.sh recommended settings.
Most people need a "roof" node - a client node located on the roof that acts as a relay for portable nodes. DO NOT USE the Router or Repeater preset on your roof. 900mhz is attenuated significantly by walls, siding (Some houses have metal backed, concrete or compressed fiberboard that has a lot of attenuation), and trees.
Due to the recommended settings, it may take a while for nodes to show up on your list. Most infrastructure nodes don't transmit except for 1-2 times per hour with node information. Try sending a message, and checking out the meshview servers hosted by the local meshtastic groups: Bay Area Meshview Sac Valley Meshview
Use a 6dbi or more gain antenna if you can.
Use a filter. Ask in the Bayme.sh discord about them, there are a couple of local hams that have them available.
The MDARC nodes are a part of the Meshtastic Bay Area Group. The Meshtastic Bay Area group is a vibrant and welcoming community of enthusiasts passionate about Meshtastic and mesh radio communications, based in and around the San Francisco Bay Area. Our members come from diverse backgrounds but share a common love for exploring and innovating in the world of mesh networks.
Check out the Bay Area Mesh https://bayme.sh or join their discord https://discord.gg/GpsKbhGJx5 for a thriving conversation.
The MDARC nodes overlap with the Sac Valley Mesh group due to it's location. They are a group focused in Sacramento, Yolo and surrounding Counties.
Check out the Sac Valley mesh https://www.sacvalleymesh.com/ or join their discord https://discord.gg/kk26pjpDhG
The MDARC nodes overlap with the Central Valley Mesh group due to it's location. They are a group focused in Fresno and Turlock and surrounding areas.
Check out the Sac Valley mesh https://centralvalleymesh.net/ or join their discord https://discord.com/invite/9KUu5QQqMx
What to take a look at the mesh? here's some maps
https://meshtastic.liamcottle.net/?lat=37.83034660061394&lng=237.83271789550784&zoom=10
https://meshmap.net/ (This map may not show full data due to the Meshtastic team's servers censoring data)
MDARC Operates two nodes on Mount Diablo north peak, on both the Longfast and MediumSlow presets.
Both nodes are built and managed by Trevor Raty KG6MDW. If you experience an issue please reach out to him on either the above listed discord servers.
This router is the main router located about 30' up the tower. It consists of the following nodes
Diablo W6CX LF (DBLF)
Station G2 @ 1w
LongFast preset w/ tuning per Bayme.sh recommended settings
3dbi L-com HGV-903U antenna
Environmental sensor
Diablo W6CX MS (DBLF)
Station G2 @ 1w
Medium Slow preset w/ tuning per Bayme.sh recommended settings
6dbi L-com HGV-906U antenna
Environmental sensor
W6CX-4 LORA APRS Igate/Digipeater
Lilygo Lora32 on 433.775 Mhz
6dbi flexible wip antenna (Shared with RTL-SDR)
Raspberry pi zero 2 W
Used for remote control and future SAME alerts on metastatic.
RTL-SDR connected to 6dbi antenna via a 2m/440 diplexer
Diablo Router on the tower
Primary Router on the bench during testing
Inside of the router box. A very tight space.
These routers where primary until the above router was installed on the tower. Instead of removing them, we left them as a backup.
They are currently using ClientMute role, and generally have poor viability to most areas.
Diablo LF W6CX Backup (DBLB)
Located on building at 5', Heltec v3
LongFast preset w/ tuning per Bayme.sh recommended settings
6dbi rubber duck antenna w/ extra weatherproofing. (Bottom antenna)
Diablo MS W6CX Backup (DBLB)
Located on building at 5', Heltec v3
MediumSlow preset w/ tuning per Bayme.sh recommended settings
MQTT to Bayme.sh MQTT Server
6dbi rubber duck antenna w/ extra weatherproofing. (Top antenna)
Backup router on the building