Pager2gotify

Please be aware this is brought on the presumption basic linux/python knowledge is evident. If you contact me i will help you.

After PagermonPi and Pagermon server/client became deprecated using PM2 to start/stop and control things was clunky at best i decided to integrate systemd, remove the heavy webui and SQLite due to problems with node and obsolete npm.

This simple python script does the work and forwards messages straight to your phone from multimon-ng using the same idea as pagermon but without the server/web front end and message database.

TL:DR.... This is a minimal, though pretty reliable bridge from multimon-ng / rtl_fm pager decoding to Gotify push notifications. Set your desired frequency and rtl-sdr gain in reader.sh and edit pager2gotify.py to add your create new app API and add filters (if you want) You may install the open source 'gotify' app via Obtainium for firsthand updates.

Designed for clean, real-world pager monitoring with mild to aggressive customisable python filtering to remove junk traffic, indistinct and bad decodes concentrating on what you want to see and be notified of.

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Features

• Customisable Filters setting POCSAG only (ignores FLEX completely or whatever your choosing)

• Supports baud filtering (e.g. 512 only)

• Capcode filtering (e.g. LPC Birdwatch = ends in 450)

• Removes:

  • test pages
  • control-character garbage
  • numeric-only junk

• Deduplication (prevents spam bursts)

• Clean notification formatting

• Runs as a systemd service

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Example Output

Mode: POCSAG
Baud: 512
Capcode: 993671

Wiedehopf spotted in shrubs on lake canterton.

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Requirements

• Linux (Raspberry Pi in this example)
• rtl_fm or equivalent SDR input
• multimon-ng
• Python 3.8+

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Installation

1. Clone repo

git clone https://github.com/bertonumber1/pager2gotify.git
cd pager2gotify

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2. Configure script

Edit:

pager2gotify.py (sudo nano pager2gotify.py)

Set your Gotify server:

GOTIFY_URL = "http://YOUR_SERVER_IP:8088"
GOTIFY_TOKEN = "YOUR_GOTIFY_APP_TOKEN"

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3. Make executable

chmod +x pager2gotify.py

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4. Create reader script: rename reader.sh.example to reader.sh (sudo mv reader.sh.example reader.sh then edit with sudo nano reader.sh)

Example:

rtl_fm -f 153.050M -M fm -s 22050 -g 40 - | \
multimon-ng -a POCSAG512 -f alpha - | \
/path/to/pager2gotify.py

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5. Create systemd service

sudo nano /etc/systemd/system/pager2gotify.service

[Unit]
Description=Pager2Gotify
After=network.target

[Service]
User=YOUR_USERNAME
ExecStart=/bin/bash /path/to/reader.sh
Restart=always

[Install]
WantedBy=multi-user.target

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6. Enable + start

sudo systemctl daemon-reload
sudo systemctl enable pager2gotify
sudo systemctl start pager2gotify

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7. Check logs

journalctl -u pager2gotify -n 50 --no-pager

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Default Filtering Logic (example filter)

Allowed:

• POCSAG
• Baud: 512
• Capcode ends with 450

Blocked:

• FLEX
• POCSAG1200 / 2400
• test pages
• control-character garbage
• numeric-only messages

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Customisation

You can modify:

ALLOW_BAUD = "512"
ALLOW_SUFFIX = "450"

Examples:

Allow multiple suffixes:

ALLOW_SUFFIXES = {"450", "451", "452"}

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Why Gotify?

• Self-hosted
• No Google dependency
• Instant push
• Simple HTTP API
• Open source app

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Disclaimer

Use only on frequencies you are licensed or permitted to monitor. This is a simple python based project i wrote myself. I thought i would upload it with the help of chatgpt as i have never used github before. Full kudos is with multimon-ng and the gotify devs. Thanks

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License

MIT