For details on programming Arduino compatible boards, see Arduino Programming.

• Adafruit Products
  • NeoTrellis M4
  • PyPortal
  • Adafruit CLUE
• Arduino Genuino
  • Arduino Duemilanove
  • Arduino Decimillia
  • Arduino UNO
  • Arduino Mega
  • Arduino Nano
• Arduino clones
  • Seeeduino Nano
• ESP
  • ESP8266 ESP-01
  • ESP-32
• Teensy
  • Teensy 3.2
  • Teensy 4.0
• ATTiny85
• SAMD51

See the dedicated page, Raspberry Pi.

These power relays let you switch high voltage power (110V AC/250V AC) using low power logic (5V). This lets you control household appliances.

• HiLetgo relay on Amazon
• HiLetgo product page
• Valefod relay on Amazon

Wiring diagram: https://www.circuitbasics.com/setting-up-a-5v-relay-on-the-arduino/ There are two sides, one side with the big relay box itself and the other side. The side with the relay is where the hot power from the wall goes. The live power line goes into the middle one, the common pin, COM or C. The two on the sides should be labeled NO and NC for normally open and normally closed. Pick the one you want to use (depends what default state you want: on or off). Let's say you picked normally open (NO). Then wire from the NO connector to your actual appliance that you want to power. The ground wire from the wall plug should go directly to the ground connector on your device.

Links:

• 4G GSM modem for Raspberry Pi on Amazon - Waveshare SIM7600A-H 4G HAT
• SIM7600A-H 4G Hat - Official Waveshare wiki page for modem
• Waveshare product video

Notes:

• Breakout UART control pins, to connect with host boards like /STM32
• Supports dial-up, telephone call, SMS, MMS, mail, TCP, UDP, DTMF, HTTP, FTP, etc. Supports GPS, BeiDou, Glonass, LBS base station positioning. Supports SIM application toolkit: SAT Class 3, USAT.
• Onboard USB interface, to test AT Commands, get GPS positioning data, and so on.
• Onboard CP2102 USB to UART converter, for serial debugging. Onboard audio jack and audio decoder for making telephone call.
• 2x LED indicators, easy to monitor the working status. SIM card slot, supports 1.8V/3V SIM card.
• Onboard voltage translator, operating voltage can be configured to 3.3V or 5V via jumper.
• Baudrate: 300bps ~ 4Mbps (default: 115200bps). Autobauding baudrate: 9600bps ~ 115200bps.
• Control via AT commands (3GPP TS 27.007, 27.005, and V.25TER command set)
• Comes with development resources and manual (examples for Raspberry Pi/ /STM32)

• Cosmo Communicator - A cool PDA/phone/camera. Currently supporting Android OS with planned support for Sailfish, Linux Debian and Linux Kali.
• Purism Librem 5 - “A Security and Privacy Focused Phone” running PureOS based on Debian.
• Nexus 5X - Can run LineageOS, /e/ OS, MaruOS.
• Nokia N900 - Can run postmarketOS based on Alpine Linux
• PinePhone - “An Open Source Smart Phone Supported by All Major Linux Phone Projects”

• 32-bit
• Requires non-free package `firmware-iwlwifi` in Debian for WiFi to work.

• 64-bit
• Requires non-free package `firmware-iwlwifi` in Debian for WiFi to work.

See the dedicated page, Synology DS418.