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The firmware update over WiFi is called OTA update. OTA stands for "over the air". The esp8266 can OTA update itself. The Arduino library for this is called ArduinoOTA and it is bundled with the ESP8266 Arduino boards support package. See the example for ArduinoOTA library in IDE Examples menu. Other MCU have the self update option too. ESP32 has ...


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From your description it sounds like a Watchdog Timer reset. The ESP8266 needs to regularly run internal householding tasks outside of your own code, such as Wifi/network related tasks. It will normally take some processing time for those tasks with every loop() iteration and with every delay() command. If your code is doing things that take longer than ...


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If you want to use SPI- The homepage of the library you mentioned, clearly explains the circuit connections.- The MPU-9250 pins should be connected as: VDD: this should be a 2.4V to 3.6V power source. GND: ground. VDDI: digital I/O supply voltage. This should be between 1.71V and VDD. FSYNC: not used, should be grounded. INT: (optional) used for the ...


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Ok, I am using WS2812B with nodemcu and Fastled. Now all folks out there reading this need not worry about voltages if your led is not blinking at all. It was not working at D0, it worked for me when I changed to D1, I am not aware of issue though. Need to check that. I did not use any other component and connected directly to nodemcu. Below is the simple ...


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To better understand voltage divider, one can look at this online calculator https://ohmslawcalculator.com/voltage-divider-calculator to see the actual formula and try the calculator to compute the unknown wanted. It is not well publish the existing voltage divider on the NodeMCU, of course you need to browse the schematic to figure it out. It goes the same ...


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