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Moreover, they are much more precise (certainly depending on clock frequency accuracy) than other software timers using millis() or micros(). These hardware PWM channels, using interrupt, still work even if other functions are blocking. This important feature is absolutely necessary for mission-critical tasks. Therefore, their executions are not blocked by bad-behaving functions or tasks. The most important feature is they're ISR-based PWM channels. PWM interval can be very long (uint32_t millisecs). It now supports 16 ISR-based synchronized PWM channels, while consuming only 1 Hardware Timer. This library enables you to use Interrupt from Hardware Timers on an ESP8266-based board to create and output PWM to pins. Now you can also modify PWM settings on-the-fly. The maximum PWM frequency is currently limited at 500Hz. Why do we need this ESP8266_PWM library Features You can modify to use larger HW_TIMER_INTERVAL_US, (from current 20uS), according to your board and use-case if crash happens.
Please have a look at HOWTO Fix Multiple Definitions Linker ErrorĪs more complex calculation and check inside ISR are introduced from v1.2.0, there is possibly some crash depending on use-case. ISR_Changing_PWM on ESP8266_NODEMCU_ESP12E ISR_16_PWMs_Array_Simple on ESP8266_NODEMCU_ESP12E ISR_16_PWMs_Array on ESP8266_NODEMCU_ESP12E
ISR_16_PWMs_Array_Complex on ESP8266_NODEMCU_ESP12E HOWTO Fix Multiple Definitions Linker Error.Why using ISR-based PWM-channels is better.Why do we need this ESP8266_PWM library.
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