Update __init__.py

esphome/components/e131/__init__.py

@@ -23,6 +23,7 @@ CHANNELS = {
 
 CONF_UNIVERSE = "universe"
 CONF_E131_ID = "e131_id"
+CONF_CHANNEL_OFFSET = "channel_offset"
 
 CONFIG_SCHEMA = cv.Schema(
     {
@@ -46,6 +47,7 @@ async def to_code(config):
         cv.GenerateID(CONF_E131_ID): cv.use_id(E131Component),
         cv.Required(CONF_UNIVERSE): cv.int_range(min=1, max=512),
         cv.Optional(CONF_CHANNELS, default="RGB"): cv.one_of(*CHANNELS, upper=True),
+        cv.Optional(CONF_CHANNEL_OFFSET, default=0): cv.int_range(min=0, max=512),
     },
 )
 async def e131_light_effect_to_code(config, effect_id):
@@ -54,5 +56,6 @@ async def e131_light_effect_to_code(config, effect_id):
     effect = cg.new_Pvariable(effect_id, config[CONF_NAME])
     cg.add(effect.set_first_universe(config[CONF_UNIVERSE]))
     cg.add(effect.set_channels(CHANNELS[config[CONF_CHANNELS]]))
+    cg.add(effect.set_channel_offset(config[CONF_CHANNEL_OFFSET]))
     cg.add(effect.set_e131(parent))
     return effect

esphome/components/e131/e131_addressable_light_effect.cpp

@@ -55,7 +55,7 @@ bool E131AddressableLightEffect::process_(int universe, const E131Packet &packet
   // limit amount of lights per universe and received
   int output_end =
       std::min(it->size(), std::min(output_offset + get_lights_per_universe(), output_offset + packet.count - 1));
-  auto *input_data = packet.values + 1;
+  auto *input_data = packet.values + 1 + (this->channel_offset_ * this->channels_);
 
   ESP_LOGV(TAG, "Applying data for '%s' on %d universe, for %" PRId32 "-%d.", get_name().c_str(), universe,
            output_offset, output_end);

esphome/components/e131/e131_addressable_light_effect.h

@@ -27,6 +27,7 @@ class E131AddressableLightEffect : public light::AddressableLightEffect {
 
   void set_first_universe(int universe) { this->first_universe_ = universe; }
   void set_channels(E131LightChannels channels) { this->channels_ = channels; }
+  void set_channel_offset(int offset) { this->channel_offset_ = offset; }
   void set_e131(E131Component *e131) { this->e131_ = e131; }
 
  protected:
@@ -34,6 +35,7 @@ class E131AddressableLightEffect : public light::AddressableLightEffect {
 
   int first_universe_{0};
   int last_universe_{0};
+  int channel_offset_{0};
   E131LightChannels channels_{E131_RGB};
   E131Component *e131_{nullptr};