ClimateGuard's CG_mini Aims to Simplify ESP32-Powered Sensor Projects
Designed as a "universal motherboard" for sensor applications, the CG_mini breaks everything out into JST connectors for simplicity.
The ClimateGuard project has launched an Espressif ESP32-based board designed specifically for sensor-heavy projects, offering solder-free connectivity using JST connectors: the CG_mini.
"[The CG_mini is a] universal motherboard designed for sensor based, monitoring and home automation projects based on ESP32-WROOM microcontroller," its creator explains. "The uniqueness of CG_mini lies in the distribution of all ports and interfaces to JST 2.54[mm] connectors, which allows you to create complete solutions without using a development board, soldering and developing your own PCB."
Featuring the ESP32-WROOM module at one side of the board, giving the board Wi-Fi and Bluetooth connectivity, the CG_mini offers a range of connectivity options: Three I2C interfaces, two UARTs, a single analog input, a OneWire interface, an SPI interface, and a "logic port" capable of handling loads of up to 0.5A.
Another key feature: A hardware watchdog with timer, designed to force a hard reset of the ESP32 every so often — once a minute, by default — in order to prevent issues caused by a hung program. Power, meanwhile, comes from a USB Type-C connector or terminals and a DC jack supporting between 9 and 28V. Finally, there are two RGB LEDs, a user-addressable button, and a physical on/off switch.
Schematics and a data sheet are available on the ClimateGuard GitHub repository, while assembled boards are available on Tindie for $34.99 each.