Add send_every to uart switch for recurring data (#1514)

esphome/components/uart/switch/__init__.py

@@ -1,7 +1,7 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.components import switch, uart
-from esphome.const import CONF_DATA, CONF_ID, CONF_INVERTED
+from esphome.const import CONF_DATA, CONF_ID, CONF_INVERTED, CONF_SEND_EVERY
 from esphome.core import HexInt
 from .. import uart_ns, validate_raw_data
 
@@ -14,6 +14,7 @@ CONFIG_SCHEMA = switch.SWITCH_SCHEMA.extend({
     cv.GenerateID(): cv.declare_id(UARTSwitch),
     cv.Required(CONF_DATA): validate_raw_data,
     cv.Optional(CONF_INVERTED): cv.invalid("UART switches do not support inverted mode!"),
+    cv.Optional(CONF_SEND_EVERY): cv.positive_time_period_milliseconds,
 }).extend(uart.UART_DEVICE_SCHEMA).extend(cv.COMPONENT_SCHEMA)
 
 
@@ -27,3 +28,6 @@ def to_code(config):
     if isinstance(data, bytes):
         data = [HexInt(x) for x in data]
     cg.add(var.set_data(data))
+
+    if CONF_SEND_EVERY in config:
+        cg.add(var.set_send_every(config[CONF_SEND_EVERY]))

esphome/components/uart/switch/uart_switch.cpp

@@ -6,6 +6,21 @@ namespace uart {
 
 static const char *TAG = "uart.switch";
 
+void UARTSwitch::loop() {
+  if (this->state && this->send_every_) {
+    const uint32_t now = millis();
+    if (now - this->last_transmission_ > this->send_every_) {
+      this->write_command_();
+      this->last_transmission_ = now;
+    }
+  }
+}
+
+void UARTSwitch::write_command_() {
+  ESP_LOGD(TAG, "'%s': Sending data...", this->get_name().c_str());
+  this->write_array(this->data_.data(), this->data_.size());
+}
+
 void UARTSwitch::write_state(bool state) {
   if (!state) {
     this->publish_state(false);
@@ -13,11 +28,20 @@ void UARTSwitch::write_state(bool state) {
   }
 
   this->publish_state(true);
-  ESP_LOGD(TAG, "'%s': Sending data...", this->get_name().c_str());
-  this->write_array(this->data_.data(), this->data_.size());
-  this->publish_state(false);
+  this->write_command_();
+
+  if (this->send_every_ == 0) {
+    this->publish_state(false);
+  } else {
+    this->last_transmission_ = millis();
+  }
+}
+void UARTSwitch::dump_config() {
+  LOG_SWITCH("", "UART Switch", this);
+  if (this->send_every_) {
+    ESP_LOGCONFIG(TAG, "  Send Every: %u", this->send_every_);
+  }
 }
-void UARTSwitch::dump_config() { LOG_SWITCH("", "UART Switch", this); }
 
 }  // namespace uart
 }  // namespace esphome

esphome/components/uart/switch/uart_switch.h

@@ -9,13 +9,19 @@ namespace uart {
 
 class UARTSwitch : public switch_::Switch, public UARTDevice, public Component {
  public:
+  void loop() override;
+
   void set_data(const std::vector<uint8_t> &data) { data_ = data; }
+  void set_send_every(uint32_t send_every) { this->send_every_ = send_every; }
 
   void dump_config() override;
 
  protected:
+  void write_command_();
   void write_state(bool state) override;
   std::vector<uint8_t> data_;
+  uint32_t send_every_;
+  uint32_t last_transmission_;
 };
 
 }  // namespace uart

tests/test1.yaml

@@ -1617,6 +1617,10 @@ switch:
   - platform: uart
     name: 'UART Bytes Output'
     data: [0xDE, 0xAD, 0xBE, 0xEF]
+  - platform: uart
+    name: 'UART Recurring Output'
+    data: [0xDE, 0xAD, 0xBE, 0xEF]
+    send_every: 1s
   - platform: template
     assumed_state: yes
     name: Stepper Switch