While browsing the web, I came across an interesting library. The Fauxmo library is intended for connecting the ESP8266/32 to an Alexa. The library simulates a Philips Hue device, which can be controlled directly via Alexa. It doesn't require any additional services or other skills.
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The combination of an ESP module and an add-on board makes the construction both very small and quite inexpensive (~€1). Nevertheless, this variant offers more connection possibilities than, for example, the ESP01 module.
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The WEMOS D1 Mini is almost entirely made up of an ESP8266. A micro USB port, a reset button, and the built-in LED on the ESP are the only peripherals. It's rather small in terms of dimensions, which naturally limits the number of pins brought out to 16. Interesting about the Wemos D1...
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Here is an acoustic connection for microcontrollers. The KY-038 module houses a microphone and a threshold switch, which can be set via a variable resistor. Both signals, that of the threshold switch and the inverted microphone signal, are provided at pins A0 and D0. WARNING: I was unable to operate this module meaningfully!!! Fact Sheet Description Value Digital...
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The HC SR501 is a 360° infrared motion sensor. It has a detection radius of 120°. When movement is detected within the measuring range, it switches a pin to 3.3V and holds it for a set hold time (on-time). Sensitivity and hold time can be adjusted using the respective rotary knobs. Facts Technical Data Description Value Operating voltage 5-20V Current < 60µA Output voltage (on/off) 3.3V/...
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I found an ESP32 module with a camera for under €10 from AliExpress. I'll give a brief introduction to it here and show the first steps. Facts In addition to everything the ESP32 already offers, here are a few additional features. Space for an SD card 520 KB SRAM + external 4MB PSRAM Support for OV2640 and…
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As always, there is a wealth of information online on how to configure the Arduino GUI. Therefore, I'll keep this section very brief, referring you to the sources linked below for more detailed information. IDE Configuration In the settings, enter the following URL: http://arduino.esp8266.com/stable/package_esp8266com_index.json Start the Board Manager: Search for ESP8266 and the sources …
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The ESP32 is the successor to the successful ESP8266 controller. It features a 32-bit Tensilica Xtensa LX6 CPU, usually with two cores (RISC architecture). Here I'm collecting information that I find interesting. Areas of Application Documentation https://www.espressif.com/en/products/hardware/esp32/overview https://github.com/espressif/arduino-esp32 Hardware Packaging The ESP32 is available as a chip or a module with additional external memory, antennas, etc. Which versions are currently available...
Continue reading "ESP32 Nützliche Infos"Here I'm collecting important information about the ESP8266. This is a working document and will be updated sporadically. Areas of Application Household applications Home automation Smart sockets and lighting Control Wi-Fi control Baby monitors IP cameras Sensor networks Wearables Internals Setting up the programming environment Arduino GUI Documentation I always get documentation on the standard libraries from GitHub https://github.com/esp8266/Arduino https://github.com/esp8266/esp8266-wiki/wiki Software Tools…
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OTA (Over-the-Air Update) is a concept for updating firmware over a network. I've taken a closer look at the Esp32FOTA library here. All of the files I used are in the following GitHub directory: https://github.com/sfambach/esp32/tree/master/test/ESP32fota If something doesn't work, it's better to use the GitHub files, as they are more up-to-date than the post. If you encounter problems, let us know...
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