Hello everyone, I wanted to share my recent experience setting up a salt softener monitoring system using ESPHome and Home Assistant. While the process was mostly smooth, I encountered a few hurdles that I thought others might find helpful to know about.
I followed an online tutorial to create a sensor setup using an ESP8266 module. The goal was to monitor the salt level in my softener tank using ultrasonic sensors. The setup involved two sensors—one measuring the salt level in percentage and the other in centimeters. The idea was to calculate the salt level based on the distance measured by the ultrasonic sensors and then display this information in Home Assistant.
Initially, everything seemed to be working fine. The ESP8266 connected to my network without issues, and the sensors were detected in Home Assistant. However, I soon noticed strange behavior in the sensor readings. The logs showed errors indicating that the distance measurements were timing out, resulting in ‘-nan’ values being sent to Home Assistant. This was perplexing because the sensors were physically connected and functioning when tested independently.
After some research, I realized that the issue might be related to the configuration of the ultrasonic sensors. The timeout value in the ESPHome configuration was set too low, causing the sensor readings to fail under certain conditions. I adjusted the timeout value in the YAML configuration to a higher value, which resolved the issue. Additionally, I found that the placement of the sensors was critical. The sensors needed to be positioned at the correct height relative to the salt tank to ensure accurate readings.
One thing I found particularly useful was the ability to filter and transform the sensor data using lambda functions in ESPHome. This allowed me to convert the raw distance measurements into meaningful percentages and centimeter values. For example, by knowing the total height of the salt tank, I could calculate the remaining salt level based on the distance measured by the ultrasonic sensor.
Another challenge I faced was the naming convention for the ESPHome device. The tutorial I followed suggested using an underscore in the device name, which I later discovered can cause issues with some DHCP services. I changed the device name to remove the underscore, which resolved any potential conflicts with my network setup.
Overall, this project has been a great learning experience. It taught me the importance of carefully reviewing configuration settings and understanding how sensor data is processed and displayed. I’m now able to monitor my salt softener levels remotely, which is incredibly convenient. If anyone else is working on a similar project, I’d be happy to share my configuration files or troubleshoot any issues they might encounter!