General

Bare Espressif ESP32 SoC IC in QFN-48 6x6 mm package. Dual-core Xtensa LX6 32-bit MCU up to 240 MHz with integrated 2.4 GHz Wi-Fi 802.11 b/g/n and Bluetooth 4.2 BR/EDR + BLE. 520 KB SRAM, 448 KB ROM, no in-package flash or PSRAM (external SPI flash required). 34 programmable GPIOs (5 strapping, 6 input-only), 18 ADC channels, 2 DACs, 10 capacitive-touch inputs, 4 SPI, 2 I2C, 3 UART, 2 I2S, SDIO host/slave, Ethernet MAC, TWAI (CAN 2.0), pulse-counter. Hardware AES/SHA/RSA acceleration. NRND (Not Recommended for New Designs) status as of datasheet v5.2.

Microchip (formerly Atmel) ATtiny85 8-bit AVR RISC microcontroller IC with 8 KB flash, 512 B EEPROM, 512 B SRAM, six GPIO, 4-channel 10-bit ADC, Universal Serial Interface (USI) supporting SPI/I2C-like signalling, two 8-bit timer/counters with PWM, internal RC oscillator, and an internal PLL for 64 MHz high-speed PWM. Default variant: ATTINY85-20PU in 8-pin PDIP, rated to 20 MHz at 4.5-5.5 V, -40 to +85 C industrial temperature range. Programmed via 6-pin AVR ISP (SPI on PB0/PB1/PB2 plus RESET) or debugWIRE single-wire interface on the RESET pin.

National Instruments roboRIO 2.0 Embedded Controller for FRC. Main robot controller with PWM, DIO, CAN, I2C, SPI, Ethernet, USB, and MXP expansion.

RP2350-based robotics controller with four DC motor ports (with encoder support), four servo headers, two Qwiic I2C connectors, on-board LSM6DSO/LSM6DSOX IMU, and Raspberry Pi RM2 Wi-Fi 4/Bluetooth wireless module. Power via USB-C or 5–11 V barrel jack.