Black pill

• STM32F411CE
• ARM M4 100 MHz
• 512 KB ROM - 128 KB RAM
• USB 2 Full Speed (device host otg)

Dev EBox F407

• STM32F407VG
• ARM M4 168 MHz
• 1024 KB ROM - 192 KB RAM
• USB 2 High Speed with DMA (device host otg)
• Product Page

Blue pill

• STM32F103C8
• ARM M3 72 MHz
• 64 KB ROM - 20 KB RAM
• USB 2 Full Speed

Applications

• Expansion boards Hackaday project
• MQTT 8 Channels dimmer