The four to twelve times higher clock rate and a comparatively huge flash memory are another dimension. The performance of the ESP32 boards makes AVR-based Arduinos like the UNO look old. Or you can take an ESP32 Pico because it is a bit smaller. Not all ESP32 modules harmonize in size with all breadboardsĪlternatively, you can also use the “Arduino UNO-like” D1 R32 board. Integration of the ESP32 into the Arduino IDE.The article has become quite long – here you can jump to the sections: However, most of it can be applied to other ESP32 boards, such as the ESP32-PICO. In my explanations and examples, I mainly refer to the widely used ESP32-WROOM-32, or the boards based on it. But maybe also the ESP32-experienced will find one or the other interesting information here. In particular, I am addressing Arduino users who want to get into the ESP32. So, why another article on this topic? It is an attempt to summarize the basic functions, peculiarities and stumbling blocks in a single post. This is due to me trying to remove latency of the system by separating operational processing and cloud processing.After I reported in my penultimate post about the I2C interfaces of the ESP32, I would like to give a complete overview of this powerful microcontroller.Įverything I discuss here has basically been described more than once by someone else. I am using just the NodeMCU-ESP32 to work this problem and separating my cloud processing on core 1 and operational processing on core 0. I have tried connecting 10k Ohm resistors to the GPIO's of the dosing pumps and ground but to no avail. This causes the flow meter intervals to change unexpectedly. This is happening through an ISR I have created which involves millis().įor some reason, when I output to (only dosing pump 2, be it a PWM signal or a simple on and off) the output of the dosing pump will trigger the ISR. I also have 2 Pulse Dosing Pumps connected to pins D2 and D15 respectively.Ĭurrently, I am recording the intervals between pulses or every 10L of 'Flow'. Provide the RTDB payload printing info and other helper functions. Provide the token generation process info.

Include Firebase ESP32 library (this library) Include Serial Peripheral Interface library The following libraries are used: /* Libraries */ I have a precision pulse flow meter connected onto pin D4 of my ESP32 and am programming in the Arduino IDE environment.

Esp32 thing interrupt pins