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Add support for PCF8574 I2C port expander

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- for Multi Relay usermod.
This commit is contained in:
Blaz Kristan 2023-05-24 23:40:23 +02:00
parent 56a3bff42e
commit b2df7981a9
2 changed files with 684 additions and 524 deletions
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12
usermods/multi_relay/readme.md
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@ -1,6 +1,9 @@
# Multi Relay # Multi Relay
This usermod-v2 modification allows the connection of multiple relays, each with individual delay and on/off mode. This usermod-v2 modification allows the connection of multiple relays, each with individual delay and on/off mode.
Usermod supports PCF8574 I2C port expander to reduce GPIO use.
PCF8574 supports 8 outputs and each output corresponds to a relay in WLED (relay 0 = port 0, etc). I you are using more than 8 relays with multiple PCF8574 make sure their addresses are set conscutively (e.g. 0x20 and 0x21). You can set address of first expander in settings.
(**NOTE:** Will require Wire library and global I2C pins defined.)
## HTTP API ## HTTP API
All responses are returned in JSON format. All responses are returned in JSON format.
@ -81,13 +84,15 @@ void registerUsermods()
Usermod can be configured via the Usermods settings page. Usermod can be configured via the Usermods settings page.
* `enabled` - enable/disable usermod * `enabled` - enable/disable usermod
* `use-PCF8574` - use PCF8574 port expander instead of GPIO pins
* `first-PCF8574` - I2C address of first expander (WARNING: enter *decimal* value)
* `broadcast`- time in seconds between MQTT relay-state broadcasts
* `HA-discovery`- enable Home Assistant auto discovery
* `pin` - ESP GPIO pin the relay is connected to (can be configured at compile time `-D MULTI_RELAY_PINS=xx,xx,...`) * `pin` - ESP GPIO pin the relay is connected to (can be configured at compile time `-D MULTI_RELAY_PINS=xx,xx,...`)
* `delay-s` - delay in seconds after on/off command is received * `delay-s` - delay in seconds after on/off command is received
* `active-high` - assign high/low activation of relay (can be used to reverse relay states) * `active-high` - assign high/low activation of relay (can be used to reverse relay states)
* `external` - if enabled, WLED does not control relay, it can only be triggered by an external command (MQTT, HTTP, JSON or button) * `external` - if enabled, WLED does not control relay, it can only be triggered by an external command (MQTT, HTTP, JSON or button)
* `button` - button (from LED Settings) that controls this relay * `button` - button (from LED Settings) that controls this relay
* `broadcast`- time in seconds between MQTT relay-state broadcasts
* `HA-discovery`- enable Home Assistant auto discovery
If there is no MultiRelay section, just save current configuration and re-open Usermods settings page. If there is no MultiRelay section, just save current configuration and re-open Usermods settings page.
@ -100,3 +105,6 @@ Have fun - @blazoncek
2021-11 2021-11
* Added information about dynamic configuration options * Added information about dynamic configuration options
* Added button support. * Added button support.
2023-05
* Added support for PCF8574 I2C port expander (multiple)

1196
usermods/multi_relay/usermod_multi_relay.h
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