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Preview ESP32 programming, Arduino - install requirements
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ESP32 programming, Arduino - install requirements

created: 2023-07-13 from Bernhard

I have not had much to do with Arduino or microcontrollers, apart from updating and operating my 3D printer. Microcontrollers, for example the ESP32, offer a cheap alternative to the Raspberry Pi for certain purposes, such as collecting data or certain control or monitoring tasks: WLAN and Bluetooth included. After entering new territory for me here, I wanted to share my experience from a beginner's point of view. Background of my efforts was a concrete use case. ... continue reading

Preview ESP32 WiFi example

ESP32 WiFi example

created: 2023-07-13 from Bernhard

In preparation for uploading sketches to a microcontroller, I installed the ESP32 board infromations and a USB to UART bridge driver, see: Preparations for programming an ESP32. ... continue reading

ESP32 MQTT - Send data
ESP32 MQTT - Send data /

ESP32 MQTT - Send data

created: 2023-07-13 from Bernhard

To be able to receive data from an ESP32, I have prepared an MQTT broker as a Docker container . The container can be integrated into Home-Assistant and thus forward the data from the ESP32 to Home-Assistant via MQTT. On the part of ESP32, I tested sending with the following sketch and later integrated the relevant parts into another sketch. ... continue reading

ESP32 Flowmeter and RS485 Modbus
ESP32 Flowmeter and RS485 Modbus /

ESP32 Flowmeter and RS485 Modbus

created: 2023-07-13 from Bernhard

As described on the article ESP32 programming, Arduino - install requirements, my first goal was to read out a TUF-2000M Ultrasonic Flow Meter via an ESP32. I found an example for an ESP8266 on the internet: Reading a TUF-2000M Ultrasonic Flow Meter with an Arduino or ESP8266 and https://forum.arduino.cc/t/comunicacion-rs485/698786/2. I described the setup of the TUF-2000M in the following article: Field Report: Ultrasonic Flow Meter TUF-2000M. To be able to read out the TUF-2000M via RS485, it... ... continue reading

Preview ESPHome: Temperature and humidity sensors DHT11/22

ESPHome: Temperature and humidity sensors DHT11/22

created: 2023-10-16 from Bernhard

For temperature measurement in Home Assistant, there are a variety of different sensors and ways to integrate them. When using Zigbee, for example, Aquara sensors are available, but these have a decisive disadvantage: the battery. It has to be replaced after 2 years at the latest. A cost-effective and more robust alternative to battery-powered sensors is provided by an ESP32 microcontroller. With the right wiring, a single microcontroller can measure the temperature and/or humidity of all possib... ... continue reading

Preview add a Relay Board ESP32 - ESPHome

add a Relay Board ESP32 - ESPHome

created: 2023-10-02 from Bernhard

To be able to switch certain relays in Home Assistant via an ESP32, I tested a relay board and integrated it via ESP-Home. ... continue reading

DS18B20 Temperature Sensors ESP32, MQTT and WiFi - HowTo

DS18B20 Temperature Sensors ESP32, MQTT and WiFi - HowTo

created: 2023-07-13 from Bernhard

In addition to connecting a flow meter via RS485 I plugged 5-piece DS18B20 temperature sensors to the ESP32 so that their values are also transmitted to HomeAssistant via MQTT. ... continue reading

Preview Home Assistant + DIY Microcontroller + ESP Home (Docker)
Home Assistant /

Home Assistant + DIY Microcontroller + ESP Home (Docker)

created: 2023-01-10 from Bernhard

With ESPHome it is very easy to program your own microcontroller for use in HomeAssistant. My first use for a self-programmed microcontroller was to record the water flow and temperature values of my heater, see: ESP32 programming, Arduino - install requirements. ... continue reading

DS18B20 - Temperature sensors in ESP-Home

DS18B20 - Temperature sensors in ESP-Home

created: 2023-07-13 from Bernhard

Complementary to the article: DS18B20 Temperature Sensors ESP32, MQTT and WiFi - HowTo, I have meanwhile replaced the Arduino project with ESP-Home. Simple projects can be implemented much easier in ESPHome. As an example, in ESPHome these 2 lines are enough to address the temperature sensors: ... continue reading

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