ESPARGOS: ESP32-based WiFi sensing array
Develop and deploy WiFi sensing applications effortlessly: ESPARGOS combines phase-synchronized ESP32 chips into a 2 × 4 antenna array.
Channel State Information
ESPARGOS provides Channel State Information (CSI) estimated from the L-LTF and HT-LTF pilot symbols in real time. Viewed in frequency domain, CSI contains information about the phase shift and attenuation experienced by the OFDM subcarriers. After a fourier transform, CSI can be interpreted as a channel impulse response. ESPARGOS supports channel bonding, achieving a bandwidth of up to 40 MHz.
Power over Ethernet
Avoid the hassle of running separate data, power and signalling cables: ESPARGOS is controlled over Ethernet, provides a simple web interface for configuration and can be powered from a power over ethernet (PoE) switch / injector. This makes ESPARGOS easy to use and deployments are quick to set up.
Python Library
With pyespargos, there is an easy-to-use library to control one or multiple ESPARGOS devices.
Configure ESPARGOS with the built-in web interface, and then easily stream channel state information to your application in real time.
The python library comes with a collection of demo applications to get you started.
Demo Applications
Use the MUSIC algorithm for angle of arrival estimation: Visualize spatial spectrum.
View Demo on GitHubCombine multiple 2 × 4 ESPARGOS antenna arrays into one large phase-synchronous array.
View Demo on GitHubInstantaneous Frequency-Domain CSI
Visualize the frequency-domain channel state information captured by all antennas.
View Demo on GitHubVisualize the time-domain channel state information captured by all antennas.
View Demo on GitHubVisualize the received phase at each of the 2 × 4 antennas of the antenna array.
View Demo on GitHubMonitor the average received phase at all antennas as it changes over time.
View Demo on GitHubReal-Time Indoor Localization Demo
With ESPARGOS, existing WiFi devices like smartphones, robots and other machines can be localized in indoor environments without requiring any changes to those devices. In line-of-sight environments, ESPARGOS can simply locate devices by triangulation. Channel Charting allows the system to locate devices even if there is no line-of-sight path between ESPARGOS and the end device. This application was publicly demonstrated at the Berlin 6G Conference 2024.