New WiFi Modules
WIFI module ESP8266-PRO, Light version of NodeMCU board, 8M flash memory
CPU: Tensilica LX106 @ 160MHz
RAM: 36KB available to user
Flash: 8MB
WiFi: 802.11n up to 65Mbps
GPIO: Up to 17
I2C: 1
SPI: 2
PWM: 4
UART: 2
ADC: 1x 0-1V ~1MSPS converter
ESP-32 WiFi Bluetooth module Dual-core CPU Ethernet port MCU Low-power Bluetooth ESP-3212
CPU: Dual Core Tensilica LX6 @ 240MHz
RAM: 520KB
Flash: 16MB
WiFi: 802.11n up to 150Mbps
Bluetooth: BT4.0 + BLE
GPIO: 32
I2C: 2
SPI: 3
PWM: 32
UART: 3
ADC: 12 channel 12-bit 2MSPS ADC
RTL8710 Wireless WiFi Transceiver Module AR3-CM3 RTL-00 UART
CPU: Cortex M3 @ 166MHz
RAM: 48KB available to user
Flash: 1MB
WiFi: 802.11n up to 150Mbps
GPIO: Up to 21
I2C: 3
SPI: 2
PWM: 4
UART: 3
ADC: 0 (has a 10-bit ADC, but used internally for the radio)