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README

This document describes how to use the Signal Messenger REST API together with Octoprint.

prerequisites:

  • docker + docker-compose
  • a phone number to send signal notifications

Set up the docker container

  • Create a docker-compose.yml file with the following contents:
version: "3"
services:
  signal-cli-rest-api:
    image: bbernhard/signal-cli-rest-api:latest
    environment:
      - MODE=json-rpc #supported modes: json-rpc, native, normal
    ports:
      - "8080:8080" # map docker port 8080 to host port 8080.
    volumes:
      - "./signal-cli-config:/home/.local/share/signal-cli" # map "signal-cli-config" folder on host system into docker container. the folder contains the password and cryptographic keys when a new number is registered
  • start the docker container with docker-compose up

Register phone number

In order to send signal messages to other users, you first need to register your phone number. This can be done via REST requests with:

curl -X POST -H "Content-Type: application/json" 'http://<ip>:<port>/v1/register/<number>'

e.g:

This registers the number +431212131491291 to the Signal network.

curl -X POST -H "Content-Type: application/json" 'http://127.0.0.1:8080/v1/register/+431212131491291'

After you've sent the registration request, you will receive a token via SMS for verfication. In order to complete the registration process you need to send the verification token back via the following REST request:

curl -X POST -H "Content-Type: application/json" 'http://<ip>:<port>/v1/register/<number>/verify/<verification code>'

e.g:

curl -X POST -H "Content-Type: application/json" 'http://127.0.0.1:8080/v1/register/+431212131491291/verify/123-456'

Troubleshooting

In case you've problems with the signal-cli-rest-api container, have a look here