How change loop_interval value for improve h-bridge light?

MiguelAngelLV · November 27, 2023, 6:22pm

Hi.

I using h-bridge light. It works fine, but, the light is a little dimmed. I check the code and each loop change the direction. The problem is ESPHome execute the loop each every 16ms (60hz), so the each light is on half time (30hz), I can notice a little flicks.

I think if can change the loop interval to 4-8ms I would get improved results.

I see the set exists in cpp, but I don’t know how pass a value from yaml:

github.com

esphome/esphome/blob/1324d9e39a4f7d850ba9fc013f3d0e412e4fa5b9/esphome/core/application.h#L188


      
           * will delay at the end of the App.loop() method.
           *
           * This is done to conserve power: In most use-cases, high-speed loop() calls are not required
           * and degrade power consumption.
           *
           * Each component can request a high frequency loop execution by using the HighFrequencyLoopRequester
           * helper in helpers.h
           *
           * @param loop_interval The interval in milliseconds to run the core loop at. Defaults to 16 milliseconds.
           */
          void set_loop_interval(uint32_t loop_interval) { this->loop_interval_ = loop_interval; }
          
          void schedule_dump_config() { this->dump_config_at_ = 0; }
          
          void feed_wdt();
          
          void reboot();
          
          void safe_reboot();
          
          void run_safe_shutdown_hooks();

tronikos · April 27, 2024, 7:49am

Add the following to your yaml config:

esphome:
  on_boot:
    then:
      - lambda: App.set_loop_interval(0);

You can see the actual loop time your ESP chip achieved by adding:

debug:
  update_interval: 5s

sensor:
  - platform: debug
    loop_time:
      name: "Loop Time"

With api component I get ~11ms on ESP8266 and ~5ms on ESP32. Without the api component I get ~1ms on ESP32.