---
- hosts: ffmuc_gluon
  gather_facts: False

  tasks:
    - name: "Update new contact-address on own ffmuc-nodes"
      #https://docs.ansible.com/ansible/latest/modules/raw_module.html
      raw: uci set gluon-node-info.@owner[0].contact=' Django [BOfH] django@nausch.org | chat -> @django' ; uci commit
...