Signalbot

Signalbot is a Python script which can send Signal messages via Email and/or SMS (using www.clockworksms.com API). It's relying on signal-cli (https://github.com/AsamK/signal-cli) to fetch the actual messages. Configuration is done in by renaming config_default.ini to config.ini and modifying it.

Warning

This script is only tested on a Raspberry Pi 2 running Raspbian Jessie, Python 2.7.9 and signal_cli 0.5.6. Your results may vary. Feel free to try and help me improve it.

CLI arguments

You may pass the following arguments to signalbot.py to overwrite defaults set in config.ini:

• --mail override config and send mail
• --notmail override config and do not send mail
• --sms override config and send SMS
• --notsms override config and do not send SMS
• --response override config and send email responses to group
• --notresponse override config and do not send email responses to group
• --fetch override config and fetch new signal messages
• --notfetch override config and do not fetch new signal messages
• --debug override config and switch on debug mode
• --notdebug override config and switch off debug mode
• --emptydb override config and delete message database after processing
• --notemptydb override config and keep message database after processing

Known issues

• SMS module doesn't check for length of messages
• Mail informing non Signal user about new messages from other non Signal users doesn't support attachments yet
• users are untrusted if they reinstall signal and therefore messages don't come through. As a workaround you can manually trust the new key using signal cli: signal-cli -u yourNumber trust -a untrustedNumber

ToDos

• add possibility to choose between multiple groups to be forwarded to different recipients
• reworking sendmail() function to support a list of attachments
• support more MIMEtypes in getmail()
• check message length and split into multiple sms if necessary
• add filter which removes cited part of email response to group
• add archive function to bot

Changelog

• 0.6.1 - email responses from non signal users will be sent by mail to other non signal users too
• 0.6 - bot now checks for email responses and sends them to signal group
• 0.5.2 - code clean up
• 0.5.1 - added timestamp to mail header
• 0.5 - fixed unicode fuckup
• 0.4 - included check for maximum attachment size
• 0.3 - included contact names
• 0.2 - now with config.ini
• 0.1 - first quick and dirty implementation