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ESP32-C6 RISC-V WiFi 6 SHTC3 TSL2591 Qwiic Qwiic USB-C
New — ESP32-C6

Brain Board V2.0

$25

Our newest wireless sensor node. Onboard temperature, humidity, and ambient light sensors. WiFi 6 and ESP-NOW Long Range mesh networking. Expand with any Qwiic I2C sensor — no soldering required.

ESP32-C6WiFi 6ESP-NOW LR SHTC3TSL2591Qwiic ×2 USB-C3× LEDOpen source
Buy — $25 View on GitHub ↗
Open-source hardware & firmware  ·  MIT License  ·  KiCad design files available

What it does

The Brain Board V2.0 is a compact wireless sensor node designed for DIY agricultural automation. It ships with onboard temperature, humidity, and ambient light sensors, and connects to a host node or WiFi network right out of the box.

Using the ESP-NOW Long Range protocol, multiple Brain Boards can form a wireless mesh — one acts as the Host (serving a live web dashboard), others act as Remote nodes sending readings every few seconds.

What’s in the box

  • 1× Brain Board V2.0 (assembled)
  • Onboard SHTC3 temp/humidity sensor
  • Onboard TSL2591 ambient light sensor
  • 2× Qwiic connectors for expansion

USB-C cable and Qwiic sensors sold separately.

New to Automato? Start with the Brain Board quick start guide — you’ll have live sensor data in your browser in under 10 minutes.

MicrocontrollerESP32-C6-MINI-1-N4 (RISC-V HP core 160 MHz + LP core 20 MHz, 4 MB flash)
WirelessWiFi 6 (802.11ax), Bluetooth 5 LE, IEEE 802.15.4 (Zigbee/Thread), ESP-NOW Long Range
Temperature / humiditySensirion SHTC3-TR — ±0.2°C, ±2% RH, I2C address 0x70
Ambient lightams-OSRAM TSL25911FN (TSL2591) — lux + infrared channel, I2C address 0x29
I2C busSDA = IO6, SCL = IO7 (shared between sensors and both Qwiic connectors)
Expansion connectors2× Qwiic / STEMMA QT (JST SM04B-SRSS-TB, 1 mm pitch)
USBUSB-C (native USB-CDC, no UART chip) — right-angle Switchcraft RAHUC31AUTR
Power regulatorDiodes Inc. AP2112K-3.3 LDO, 600 mA max
LEDsGreen (IO?), Red (IO?), Blue / LED_BUILTIN (IO23) — Kingbright 0402
ButtonsRESET (EN) and BOOT (IO9) — tactile SMD
Reverse-polarity protectionBAT20J Schottky diode
Castellated pads2× 1×10 (DNP) exposing IO0–IO5, IO14, IO15, IO18–IO23, TX, RX, USB
Arduino board packageautomato-arduino v0.1.2, requires arduino-esp32 v3.3.0
Bootloader offset0x0 (ESP32-C6 native)
DimensionsSee KiCad files for exact dimensions
LicenseMIT (hardware & firmware)
Pin / LabelGPIOFunction
LED_BUILTIN / Blue LEDIO23Digital output — onboard blue LED
SDAIO6I2C data — shared with sensors + Qwiic
SCLIO7I2C clock — shared with sensors + Qwiic
TXIO16UART transmit
RXIO17UART receive
SSIO2SPI chip select
MOSIIO3SPI data out
MISOIO4SPI data in
SCKIO5SPI clock
BOOTIO9Boot button — hold at power-on for flash mode