Huawei LTE modem monitor for Zabbix

values can be configured to be reported (sent) as follows:
- each time polled
- reported only when changed (reports value from last polling interval too)
- or after certain intervals
uses the following libraries
- https://github.com/Salamek/huawei-lte-api
- https://github.com/adubkov/py-zabbix
  - https://py-zabbix.readthedocs.io/en/latest/sender.html

Current status

Testing with python 3.9
Tested on Huawei B535-333
- Zabbix Template and api configuration made for this model
  - monitors endpoint and keys that I am interested in
Using with zabbix 4.2 ( should work with newer versions, but haven't tried the template)
Handles connection problems to modem and zabbix moderately well (see tests/NOTES.md)
api endpoints, keys, polling interval and sending strategies are configured by a YAML file generates a dictionary with information about how to handle each key

=config.yml= place for default stuff, ideally safe to be on a public repo
=own_config.yml= writes over variables in =config.yml=
=api_poll_config:= in the above config files sets the location of the api polling configuration
- api polling configuration is defined in =api_design.yml=
- =api_huawei_lte_4g_config.yml= works with the current zabbix template