At Semillistas, we love experimenting and continuing to improve our tools for eco-social restoration. Today we want to share one of those advances that make us proud: the evolution of our domestic refrigerator control system, which we use as temperature-controlled chambers to preserve seeds and perform germination treatments.
For four years, we worked with version 1 of this system, in which a single Raspberry Pi and an Arduino managed up to six refrigerators. It was a veritable tangle of cables, and every small adjustment—such as moving a refrigerator or adding a new one—became a technical odyssey.
Now we are launching version 2, a qualitative leap that simplifies and improves the entire process. In this new configuration, each refrigerator has its own ESP32 microcontroller and connects via Wi-Fi to a central server. This system allows us to have individualized control, receive notifications in case of errors, and react more quickly to any incident.
In addition to being more efficient and easier to maintain, this new design opens the door to future improvements: we are working on optimizing the temperature control program and creating a more intuitive interface for those who manage the chambers from the laboratory.
We continue to sow free knowledge and open-source technology.
