pumpPWM.h

hrfrazier

Jun 11th, 2025

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#include "esphome.h"
#include "pwmWrite.h"
using namespace esphome;
#define PUMP_PWM_A 32
#define PUMP_PWM_B 33
Pwm pwm = Pwm();
const char TAG[]="PUMP_PWM";
class AeroGardenPumpOutput : public Component, public BinaryOutput {
public:
bool runState=false;
void setup() override {
ESP_LOGI(TAG,"Started PWM Control.");
//https://github.com/Dlloydev/ESP32-ESP32S2-AnalogWrite
pwm.pause();
//The following is done in the write_state function.
//For the H-Bridge to truly turn off, both outputs need
// to be 0 or both 1.
//The inverted pin needs to be detached and reattached as non-inverted
//for its output to go to 0 on pause or else it will go to 1.
//So, I just made it detach and reattach both pins on both
// on/off branches of write_state for simplicity and so that it's clear.
//No longer need below
//Attach to pwm channel sharing timer 2
// pwm.attach(PUMP_PWM_A, 4, false); //pin 32, channel 4, invert=false
// pwm.attach(PUMP_PWM_B, 5, true); //pin 33, channel 5, invert=true
// pwm.write(PUMP_PWM_A, 128, 60); //Set pin 32 to 50% duty, 60hz
// pwm.write(PUMP_PWM_B, 128, 60);
}
bool state(){return runState;}
void loop() override {
}
void write_state(bool state) override {
if(!runState && state){
ESP_LOGI(TAG,"Turning PWM ON.");
//resume pins 32 & 33 to 50% duty, 60hz
pwm.detach(PUMP_PWM_A); //pin 32, channel 4, invert=false
pwm.detach(PUMP_PWM_B); //pin 33, channel 5, invert=true
pwm.attach(PUMP_PWM_A, 4, false); //pin 32, channel 4, invert=false
pwm.attach(PUMP_PWM_B, 5, true); //pin 33, channel 5, invert=true
pwm.write(PUMP_PWM_A, 128, 60);
pwm.write(PUMP_PWM_B, 128, 60);
pwm.resume(4); //Resume channel 4
pwm.resume(5); //Resume channel 5
} else if (runState) {
ESP_LOGI(TAG,"Turning PWM OFF.");
//Roundabout way - detach and reattach without inverted pin
pwm.detach(PUMP_PWM_A);
pwm.detach(PUMP_PWM_B);
pwm.attach(PUMP_PWM_A, 4, false);
pwm.attach(PUMP_PWM_B, 5, false);
pwm.write(PUMP_PWM_A, 0, 60);
pwm.write(PUMP_PWM_B, 0, 60);
pwm.pause(4); //Pause channel 4
pwm.pause(5); //Pause channel 5
}
runState = state;
}
};

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