SOFTWARE SERIAL ESP8266 PROGRAMMING SERIAL
SOFTWARE SERIAL ESP8266 PROGRAMMING SOFTWARE

SOFTWARE SERIAL ESP8266 PROGRAMMING SERIAL

Serial data received while in the function may be lost.

Inside the attached function, delay() wonвЂ™t work and the value returned by millis() will not increment. ESP8266 boards, such as ESP8266_NODEMCU_ESP12E, etc.The catch is your function is now part of an ISR (Interrupt Service Routine), and must be lean / mean, and follow certain rules. For example, certain function is blocking while it's connecting to WiFi or some services.

SOFTWARE SERIAL ESP8266 PROGRAMMING SOFTWARE

That's necessary if you need to measure some data requiring better accuracy.ДЇunctions using normal software timers, relying on loop() and calling millis(), won't work if the loop() or setup() is blocked by certain operation. Moreover, they are much more precise (certainly depending on clock frequency accuracy) than other software timers using millis() or micros().

These hardware timers, using interrupt, still work even if other functions are blocking. The correct choice is to use a Hardware PWM-channels with Interrupt to call your function. You'd prefer to have your function called, no matter what happening with other functions (busy loop, bug, etc.). So your function might not be executed, and the result would be disastrous. But what if another function is blocking the loop() or setup(). You normally use a software timer to poll, or even place the function in loop(). Imagine you have a system with a mission-critical function, measuring water level and control the sump pump or doing something much more important. Why using ISR-based PWM-channels is better This non-being-blocked important feature is absolutely necessary for mission-critical tasks. You can also have many (up to 16) timers to use. The ISR_16_PWMs_Array_Complex example will demonstrate the nearly perfect accuracy compared to software timers by printing the actual elapsed millisecs of each type of PWM channels.Д«eing ISR-based timers, their executions are not blocked by bad-behaving functions / tasks, such as connecting to WiFi, Internet and Blynk services. This important feature is absolutely necessary for mission-critical tasks. Therefore, their executions are not blocked by bad-behaving functions / tasks. The most important feature is they're ISR-based PWM channels. Now with these new 16 ISR-based timers, the maximum interval is practically unlimited (limited only by unsigned long miliseconds) while the accuracy is nearly perfect compared to software timers. Timers' interval is very long ( ulong millisecs). That's necessary if you need to measure some data requiring better accuracy.ДЄs Hardware Timers are rare, and very precious assets of any board, this library now enables you to use up to 16 ISR-based synchronized PWM channels, while consuming only 1 Hardware Timer. These hardware PWM channels, using interrupt, still work even if other functions are blocking. Therefore, their executions are not blocked by bad-behaving functions or tasks. 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. The maximum PWM frequency is currently limited at 500Hz. Why do we need this ESP8266_PWM library Features 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.

Software serial esp8266 programming