Context: Electric signals are a universal method to rapidly transmit information in living organisms In plants, electric signals have been studied for more than a century In animals, bioelectrical activity measurements in the heart (ECG) or the brain (EEG) provide information about people’s health status Objectives: Development and test an electrophysiological sensor for crops Enables real-time measurements of electric signals in production conditions, without a Faraday cage Supervised machine learning and automatic classification to detect biotic & abiotic crop stress