Awesome M5Stack Cardputer

M5Stack Cardputer is a S3 Stamp cheap ($30) and complete mini computer in a credit-card size, weighing 92.8g.
Official website | Docs

Specs

Processor

From ESP32-S3Fn8 (Datasheet):

• Dual 32bit Xtensa LX7 cores running up to 240Mhz
• RISC-V Ultra Low Power Co-processor
• ULTRA LOW Deep Sleep Current

Memory

• RAM: 8MB Quad SPI PSRAM
• 128-bit data bus and SIMD commands
• 384 KB ROM - for booting and core functions
• 512 KB SRAM - for data and instructions, running at a configurable frequency of up to 240 MH
• 16 KB SRAM in RTC - can retain data in Deep-sleep mode
• 4 Kbit eFuse - reserved for user data, such as encryption key and device ID

Devices/Resources

• Bluetooth: 5.0, BLE + Mesh
• Wi-Fi: 802.11b/g/n 2.4Ghz
• Display: IPS LCD, 1,14", 240x135px
• Battery: internal 120mAh + 1400mAh (in the base) lithium battery
• TF-Card (MicroSD) slot
• 1 USB-C OTG in/out
• Keyboard: 56 keys, QWERTY type, ortholinear with tactile click switches
• Infrared ∠0° : 410cm, < 90° : 66cm, < 45° : 170cm
• Digital MEMS Microphone
• Sound: I2S-Speaker, 8Ω@1W

Note: no builtin NFC or RFID

Pre-installed apps

• Wi-Fi Scanner
• Audio recorder
• ESP Chat - to communicate with other cardputers or similars
• IR remote data send manually
• Python REPL
• Set WiFi
• Timer
• Keyboard (USB or Bluetooth) connector