Hardware

VoidRecon can be built with the official PCB or on a breadboard.

PCB Version

If you have the VoidRecon PCB, solder the components:

• ESP32 (WROOM or WROVER)
• CC1101 module (e.g., with SMA connector)
• Antenna (SMA or wire)
• Passive parts (caps, resistors, voltage regulator if needed)
• USB‑to‑UART bridge (if not built‑in)

The PCB routes all SPI and power connections – no wiring required.

DIY Breadboard Wiring

Connect the CC1101 module to the ESP32 using these pins:

CC1101 Pin	ESP32 Pin	Notes
VCC	3.3V	Use a stable 3.3V supply (do not use 5V)
GND	GND	Common ground
SCLK	GPIO 18	SPI Clock (can be changed in firmware)
SO (MISO)	GPIO 19	SPI Master In / Slave Out
SI (MOSI)	GPIO 23	SPI Master Out / Slave In
CSn	GPIO 5	Chip Select (active low)
GDO2	GPIO 4	Optional – used for packet reception interrupts
GDO0	GPIO 2	Optional – used for TX/RX status

• Antenna: Connect a quarter‑wave whip (~17.3 cm for 433 MHz) or a 50Ω antenna to the CC1101’s antenna pin/SMA.