Description

Cactus Micro is our integrated developement board, we have mixed Arduino with WIFI into a single board. It is targeted for makers to develop low power Internet-Of-Things (IoT) projects quickly and easily.

The micro-controller unit (MCU) is Atmel ATmega32U4 and the WIFI chip is ESP8266.

The revision 2 keep the same size with rev1. But use hardware serial port Serial1 as default option. It also added some jumpers for connect esp8266 GPIO. For some case such as I2C.

Features

• Built-in ESP8266 WIFI module
• ATmega32U4 running at 3.3V/8MHz
• Supported under Arduino IDE v1.0.6
• On-Board micro-USB connector for programming
• 4 x 10-bit ADC pins
• 12 x Digital I/Os (5 are PWM capable)
• Rx and Tx Hardware Serial Connections

Specification

Microcontroller	Atmel ATmega32U4
Wireless Chip	ESP8266 (ESP-03)
Operating Voltage	3.3V
Input Voltage	5V (USB) 4.3-6V (RAW) Note: Use either one power source at a time, otherwise you will damage the board.
Clock Speed	8MHz
Connectivity	WIFI micro-USB Serial I2C SPI
Flash Memory	32KB (of which 4 KB used by bootloader)
SRAM	2.5k
EEPROM	1k
Dimensions	1.3 x 0.7"
I/O Pins	18

Documents

• Starter Guide
• Schematic
• Hookup Guide
• About ESP8266 chip
• AT Command Instruction
• Datasheet (ATmega32U4)
• GitHub
• Tutorials And Examples
• Firmware For ESP8266