Feature/sensor cse7761

[berfenger]

What does this implement/fix?

Adds CSE7761 power sensor component, a power sensor present on Sonoff Dual R3 v1.x

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other

Related issue or feature (if applicable): fixes esphome/feature-requests#1151

Pull request in esphome-docs with documentation (if applicable): esphome/esphome-docs#1541

Test Environment

• ESP32
• ESP32 IDF
• ESP8266

Example entry for config.yaml:

# Example config.yaml
uart:
  tx_pin: GPIO25
  rx_pin: GPIO26
  baud_rate: 38400
  parity: EVEN
  stop_bits: 1

sensor:
  platform: cse7761
  voltage:
    name: 'CSE7761 Voltage'
  current_1:
    name: 'CSE7761 Current 1'
  current_2:
    name: 'CSE7761 Current 2'
  active_power_1:
    name: 'CSE7761 Active Power 1'
  active_power_2:
    name: 'CSE7761 Active Power 2'
  update_interval: 5s

Checklist:

• The code change is tested and works locally.
• Tests have been added to verify that the new code works (under tests/ folder).

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in esphome-docs.

[probot-esphome]

Hey there @berfenger,
Thanks for submitting this pull request! Can you add yourself as a codeowner for this integration? This way we can notify you if a bug report for this integration is reported.
In __init__.py of the integration, please add:

CODEOWNERS = ["@berfenger"]

And run script/build_codeowners.py

_{^{(message by NeedsCodeownersLabel)}}

[oxan]

Hi, thanks for your contribution! A few comments:

[oxan]

Thanks!