Rewrite button presses in loop to prevent blocking

components/hauslane/hauslane.cpp

@@ -5,7 +5,6 @@ namespace esphome {
 namespace hauslane {
 
 static const char *TAG = "hauslane";
-static const int DELAY=250; // how long to press/release buttons in ms
 
 void Hauslane::setup() {
 	// initialize the input pins
@@ -65,6 +64,55 @@ void Hauslane::loop() {
 				pos = 0;
 			}
 		}
+
+		// execute new button press every DELAY ms if needed to adjust state
+		if (millis() - this->last_press > DELAY) {
+			if (this->last_button != NULL) {
+				// button already pressed, so de-activate button
+				button_press(this->last_button, false);
+			} else if (this->meet_target) {
+				// adjustment of speed/light requested, so press buttons until
+				// reaching speed_target and light_target
+				if (this->speed != this->speed_target) {
+					// adjust speed as necessary
+					if (this->speed_target==0 && !this->light_cur) {
+						// request fan turn off and light is off, so simply hit power button
+						button_press(pin_power, true);
+					} else if (this->speed == 0 && !this->light_cur) {
+						if (this->power) {
+							// power already on, so activate fan by pressing down button
+							button_press(pin_down, true);
+						} else {
+							// first activate by pressing power button
+							button_press(pin_power, true);
+						}
+					} else if (this->speed < this->speed_target) {
+						// increase speed
+						button_press(pin_up, true);
+					} else if (this->speed > this->speed_target) {
+						// decrease speed
+						button_press(pin_down, true);
+					}
+				} else if (this->light_cur != this->light_target) {
+					if (this->power) {
+						// press light button
+						button_press(pin_light, true);
+					} else {
+						// power on hood first
+						button_press(pin_power, true);
+					}
+				} else {
+					// target already met, so reset flag
+					this->meet_target=false;
+				}
+			} else if (this->speed==0 && !this->light_cur) {
+				// reset power flag
+				if(this->power) {
+					this->power=false;
+					ESP_LOGD(TAG, "Hood power: %d", this->power);
+				}
+			}
+		}
 	}
 }
 
@@ -78,44 +126,17 @@ void Hauslane::dump_config() {
 
 // turns the light on/off
 void Hauslane::set_light(bool binary) {
-	if (this->light_cur != binary) {
-		if (speed==0) {
-			// fan is not on, so need to power system on before pressing light button
-			button_press(pin_power);
-			if (binary) {
-				button_press(pin_light);
-			}
-		} else {
-			// fan is on, so only need to press light button
-			button_press(pin_light);
-		}
+	if (this->light_target != binary) {
+		this->light_target = binary;
+		this->meet_target = true;
 	}
 }
 
 // set the speed of the fan 0=off, 6=full
 void Hauslane::set_speed(int new_speed) {
-	if (new_speed==0 && !this->light_cur) {
-		// request fan turn off and light is off, so simply hit the power button
-		button_press(pin_power);
-	} else if (this->speed == 0) {
-		// requesting speed from 1-6
-		if (!this->light_cur) {
-			// light is off, so activate hood with power button first
-			button_press(pin_power);
-		}
-		// turn on the fan to previously used speed by pressing down button
-		button_press(pin_down);
-	} else {
-		// adjust speed pressing up/down appropriate number of times
-		while (this->speed != new_speed) {
-			if (this->speed < new_speed) {
-				this->speed++;
-				button_press(pin_up);
-			} else if (this->speed > new_speed) {
-				this->speed--;
-				button_press(pin_down);
-			}
-		}
+	if (this->speed_target != new_speed) {
+		this->speed_target = new_speed;
+		this->meet_target = true;
 	}
 }
 
@@ -209,9 +230,9 @@ void Hauslane::set_state(bool set_light, uint8_t set_speed) {
 			this->send_light_state(set_light);
 		}
 	}
-	if (speed != set_speed) {
+	if (this->speed != set_speed) {
 		// save current state of fan in memory
-		ESP_LOGD(TAG, "Received fan peed: %d", set_speed);
+		ESP_LOGD(TAG, "Received fan speed: %d", set_speed);
 		this->speed = set_speed;
 		// send fan state to API if it is active
 		if (this->send_fan_speed) {
@@ -225,27 +246,34 @@ void Hauslane::set_state(bool set_light, uint8_t set_speed) {
 // simulates a button press for the specified button on front panel via GPIO
 void Hauslane::command(std::string command) {
 	if (command == "timer" && pin_timer) {
-		button_press(pin_timer);
+		button_press(pin_timer, true);
 	} else if (command == "up" && pin_up) {
-		button_press(pin_up);
+		button_press(pin_up, true);
 	} else if (command =="down" && pin_down) {
-		button_press(pin_down);
+		button_press(pin_down, true);
 	} else if (command == "light" && pin_light) {
-		button_press(pin_light);
+		button_press(pin_light, true);
 	} else if (command == "power" && pin_power) {
-		button_press(pin_power);
+		button_press(pin_power, true);
 	} else {
 		ESP_LOGD(TAG, "Invalid button name: %s", command.c_str());
 	}
 }
 
 // simulate a button press by activating the GPIO then releasing
-void Hauslane::button_press(GPIOPin *pin) {
+void Hauslane::button_press(GPIOPin *pin, bool val) {
+	if (val) {
 		ESP_LOGD(TAG, "Press button: %d", pin);
-	pin->digital_write(true);
-	delay(DELAY);
-	pin->digital_write(false);
-	delay(DELAY);
+		this->last_button=pin;
+	} else {
+		ESP_LOGD(TAG, "Release button: %d", pin);
+		if (this->last_button==this->pin_power) {
+			this->power= !this->power;
+		}
+		this->last_button=NULL;
+	}
+	pin->digital_write(val);
+	last_press=millis();
 }
 
 // ESPHome light component

components/hauslane/hauslane.h

@@ -17,6 +17,7 @@ static const unsigned char MSG_START[] = {0x08, 0x08, 0x08, 0xfe, 0xc0};
 static const unsigned char MSG_END[] = {0xc0, 0xce, 0xce, 0xce};
 static const uint8_t START_LEN=5;
 static const uint8_t END_LEN=4;
+static const int DELAY=250; // how long to press/release buttons in ms
 
 class Hauslane : public Component, public uart::UARTDevice, public api::CustomAPIDevice {
 	public:
@@ -40,14 +41,20 @@ class Hauslane : public Component, public uart::UARTDevice, public api::CustomAP
 		void parse_state();
 		void set_state(bool set_light, uint8_t set_speed);
 		bool light_cur=false;
+		bool light_target=false;
 		uint8_t speed=0;
+		uint8_t speed_target=0;
+		bool meet_target=false;
+		bool power=false;
+		unsigned long last_press=0;
 		GPIOPin *pin_timer;
 		GPIOPin *pin_up;
 		GPIOPin *pin_down;
 		GPIOPin *pin_light;
 		GPIOPin *pin_power;
+		GPIOPin *last_button;
 		void command(std::string command);
-		void button_press(GPIOPin *pin);
+		void button_press(GPIOPin *pin, bool val);
 		std::function<void(bool)> send_light_state;
 		std::function<void(int)> send_fan_speed;
 };

uc-ps18.yaml

@@ -38,6 +38,11 @@ captive_portal:
 uart:
   baud_rate: 3600
   rx_pin: 6
+  # uncomment below to get the raw UART messages
+  #debug:
+  #  direction: RX
+  #  sequence:
+  #    - lambda: UARTDebug::log_string(direction, bytes);
 
 hauslane:
   id: hauslane_id