ESP32 HiGrow V1.0 (Plant Spike)
A plant stake with ESP32 and a few sensors. What it can do, you'll find out in the post.
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Control ESP with Alexa
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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ESP8266 Arduino GUI setup
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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OTA - ESP32fota Test
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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Put the ESP8266 to sleep
Sensorknoten sollen möglichst lange und unabhängig arbeiten können. Dennoch benötigen sie Strom, um mit der vorhandenen Energie möglichst effizient umgehen zu können, hat der ESP8266 und andere Controller die Möglichkeit in den Tiefschlaf zu gehen. Das schöne ist er kann sich nach fast beliebiger Zeit selbst wieder aufwecken. Ein Nachteil beim ESP8266 ist das er …
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MQTT Protocol + Experimental Setup
I came across the term MQTT online and really liked the approach behind it. So, I treated myself to a small experimental setup, which I've described below. First, a few details about MQTT. About MQTT General Information MQTT governs communication between data sources and data sinks using a broker. Data Source Sources for…
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NodeMCU V2 Motor Board
There is an expansion board with a motor driver for the NodeMCU V2. It allows two small motors (up to 1.2 Amperes) to be controlled via an L293DD motor driver. It is also possible to connect a stepper motor. Furthermore, it offers two separate connections for the power supply of the board and the motors. Most of the ESP pins are brought out with an additional ground/power pin, which makes connecting...
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ESP8266 SSD1306 Monochromatic OLED 128×64 I2C
I bought two almost identical 128×64 displays to test them. These are controlled via the Wire (I2C) bus. However, there are also variants for the SPI bus, which are not covered here. The two displays have only two obvious differences at first glance. First, they have different sized drill holes and...
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Spice up NodeMCU V3 with an OLED display
I still had two OLED displays from a test and was wondering what I could do with them. Since I've been experimenting with nodes with integrated displays lately, I was planning to give my old ESP8266 NodeMCU V3 a bit of a boost. I want to briefly outline the process here; don't hesitate to ask questions and leave a comment. ...
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Setting up ESP32 with the Arduino GUI
As always, there is a wealth of information online on how to configure the Arduino GUI. Therefore, I will be very brief here, and for more detailed information, please refer to the sources linked below. Board Manager The ESP 32 has made its way into the Board Manager quite some time ago. The steps for installation are outlined here briefly. …
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