yowsup cli - mgerasim/dev01 GitHub Wiki
http://bacula.us/sending-notification-whatsapp/
https://github.com/tgalal/yowsup/issues/1571
https://github.com/tgalal/yowsup/issues/1661#issuecomment-228287130
blocking occurs because the same number with different versions of yowsup or other servers are used. if they will change version or will include changes in yowsup, delete the axolotl.db file before execute again yowsup.
besides this, try not to send more than 50 messages unanswered.
WhatsApp policies clearly that blocked number is detected as an automated system indicate. recommended would be a bot, with question and answer.
1. Обновить yowsup2-cli
* ```sudo pip install python-axolotl-curve25519 pyreadline pillow yowsup2 --upgrade```