From 0b305eabe5435efb5e2acc6debe0fcb582507caa Mon Sep 17 00:00:00 2001
From: Jonathan Swoboda <jonathan.swoboda>
Date: Fri, 15 Nov 2024 08:57:16 -0500
Subject: [PATCH] Add a one wire option to the transmitter

---
 esphome/components/remote_transmitter/__init__.py         | 5 +++++
 .../components/remote_transmitter/remote_transmitter.h    | 3 +++
 .../remote_transmitter/remote_transmitter_esp32.cpp       | 8 +++++---
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/esphome/components/remote_transmitter/__init__.py b/esphome/components/remote_transmitter/__init__.py
index a8dd4dd9d4..0d27953d9c 100644
--- a/esphome/components/remote_transmitter/__init__.py
+++ b/esphome/components/remote_transmitter/__init__.py
@@ -8,6 +8,7 @@ AUTO_LOAD = ["remote_base"]
 
 CONF_ON_TRANSMIT = "on_transmit"
 CONF_ON_COMPLETE = "on_complete"
+CONF_ONE_WIRE = "one_wire"
 
 remote_transmitter_ns = cg.esphome_ns.namespace("remote_transmitter")
 RemoteTransmitterComponent = remote_transmitter_ns.class_(
@@ -22,6 +23,7 @@ CONFIG_SCHEMA = cv.Schema(
         cv.Required(CONF_CARRIER_DUTY_PERCENT): cv.All(
             cv.percentage_int, cv.Range(min=1, max=100)
         ),
+        cv.Optional(CONF_ONE_WIRE): cv.boolean,
         cv.Optional(CONF_RMT_CHANNEL): esp32_rmt.validate_rmt_channel(tx=True),
         cv.Optional(CONF_ON_TRANSMIT): automation.validate_automation(single=True),
         cv.Optional(CONF_ON_COMPLETE): automation.validate_automation(single=True),
@@ -36,6 +38,9 @@ async def to_code(config):
 
     cg.add(var.set_carrier_duty_percent(config[CONF_CARRIER_DUTY_PERCENT]))
 
+    if one_wite_config := config.get(CONF_ONE_WIRE):
+        cg.add(var.set_one_wire(one_wite_config))
+
     if on_transmit_config := config.get(CONF_ON_TRANSMIT):
         await automation.build_automation(
             var.get_transmit_trigger(), [], on_transmit_config
diff --git a/esphome/components/remote_transmitter/remote_transmitter.h b/esphome/components/remote_transmitter/remote_transmitter.h
index aa10f9c538..85b1a7c219 100644
--- a/esphome/components/remote_transmitter/remote_transmitter.h
+++ b/esphome/components/remote_transmitter/remote_transmitter.h
@@ -34,6 +34,8 @@ class RemoteTransmitterComponent : public remote_base::RemoteTransmitterBase,
 
   void set_carrier_duty_percent(uint8_t carrier_duty_percent) { this->carrier_duty_percent_ = carrier_duty_percent; }
 
+  void set_one_wire(bool one_wire) { this->one_wire_ = one_wire; }
+
   Trigger<> *get_transmit_trigger() const { return this->transmit_trigger_; };
   Trigger<> *get_complete_trigger() const { return this->complete_trigger_; };
 
@@ -55,6 +57,7 @@ class RemoteTransmitterComponent : public remote_base::RemoteTransmitterBase,
 
   uint32_t current_carrier_frequency_{38000};
   bool initialized_{false};
+  bool one_wire_{false};
   rmt_channel_handle_t channel_{NULL};
   rmt_encoder_handle_t encoder_{NULL};
   std::vector<rmt_symbol_word_t> rmt_temp_;
diff --git a/esphome/components/remote_transmitter/remote_transmitter_esp32.cpp b/esphome/components/remote_transmitter/remote_transmitter_esp32.cpp
index 4b2604f129..bd7f5fa1aa 100644
--- a/esphome/components/remote_transmitter/remote_transmitter_esp32.cpp
+++ b/esphome/components/remote_transmitter/remote_transmitter_esp32.cpp
@@ -18,6 +18,7 @@ void RemoteTransmitterComponent::dump_config() {
   ESP_LOGCONFIG(TAG, "Remote Transmitter...");
   ESP_LOGCONFIG(TAG, "  RMT memory blocks: %d", this->mem_block_num_);
   ESP_LOGCONFIG(TAG, "  Clock divider: %u", this->clock_divider_);
+  ESP_LOGCONFIG(TAG, "  One wire: %s", this->one_wire_ ? "true" : "false");
   LOG_PIN("  Pin: ", this->pin_);
 
   if (this->current_carrier_frequency_ != 0 && this->carrier_duty_percent_ != 100) {
@@ -37,9 +38,10 @@ void RemoteTransmitterComponent::configure_rmt_() {
   channel.gpio_num = gpio_num_t(this->pin_->get_pin());
   channel.mem_block_symbols = 64 * this->mem_block_num_;
   channel.trans_queue_depth = 1;
-  // TODO: add support for a rx/tx 1-wire gpio
-  // channel.flags.io_loop_back = 1;
-  // channel.flags.io_od_mode = 1;
+  if (this->one_wire_) {
+    channel.flags.io_loop_back = 1;
+    channel.flags.io_od_mode = 1;
+  }
   esp_err_t error = rmt_new_tx_channel(&channel, &this->channel_);
   if (error != ESP_OK) {
     this->error_code_ = error;