Node.js script/daemon to (hackily) send SMS from the Voxtelesys API to Matrix and back.

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README.md

matrix-bridge-voxtelesys

When someone texts your Voxtelesys DID, this script creates a Matrix room named with the sender's number, posts their SMS in it, and invites you (the users in config.json) to the room. When someone posts a message in the room this script sends it as an SMS to the original sender. Back and forth it goes!

Installation

git clone https://source.netsyms.com/Netsyms/matrix-bridge-voxtelesys /opt/matrix-bridge-voxtelesys
cd /opt/matrix-bridge-voxtelesys
cp config.example.json config.json
nano config.json
npm install
adduser --system --no-create-home matrix-bridge-voxtelesys
cp matrix-bridge-voxtelesys.service /etc/systemd/system
systemctl enable matrix-bridge-voxtelesys
systemctl start matrix-bridge-voxtelesys

Or just run node main.js.

Configuration

Here's what the various config options mean.

homeserver: Matrix homeserver.
mediaurlpath: The public HTTP url for accessing media sent by a Matrix user. The parts in curly brackets will be replaced with the proper values. Check what to set the domain to by right-clicking a media file in Element.
matrixdomain: The part after the @ in your username.
matrixuser: Bot account username for this bridge.
matrixpass: Bot account password.
inviteusers: List of users that the bot will invite to new SMS rooms.
smsapikey: Voxtelesys SMS API key.
smsfrom: Default DID. Outgoing SMS will be sent from this number.
smsonlyto: List of DIDs this bridge should handle incoming SMS from.
listenport: HTTP port for webhook endpoint server.
publicurl: Public URL of this bridge's built-in HTTP server.
loglevel: debug, info, or error.
smsinterval: Bridge will poll Voxtelesys API every X seconds. Set to 0 to use webhook only.

Webhook Setup

In the Voxtelesys Portal, go to APIs -> Messaging Applications. Edit your application and set HTTP Method to "POST", Events to "Inbound messages (MOs)", MO Webhook to "http://bridge-url:8069/webhook", and Authentication to "None".

Starting a new conversation

When a SMS is received from a new number, a new room is created. If you need to send a message to a new number, simply type something like !sms 14065551234 into an existing SMS room. You'll be invited to join a new room and will then be able to send your message.

Chat Commands

Chat commands can be issued in any room the bot is joined to.

!sms 1234567890: Create a new empty SMS room for the provided phone number, and invite all invitusers to the room. Texts will send from the smsfrom number.
!sms 1234567890 9876543210: Create a new empty SMS room, and invite all invitusers to the room, as above. Texts will send from the second number entered.
!fixusers: Goes through all the SMS rooms, checking membership against inviteusers. If anyone's missing from a room, they're invited back.

Known Issues/Limitations

Any messages posted in a Matrix room while the bot is offline will not be relayed to SMS when it comes back.
Only unread SMS are fetched, so if anything else is checking the API this bot won't get those.
If it crashes try the latest Node.js LTS (v14 as of commit date)