If you’re building a Raspberry Pi project and need to send data back-and-forth, the WiFi module built into newer Pi’s should be fine for most cases.
However, WiFi does not have a long range and also requires both investment (through your ISP) and setup (routers, access points, network security schemes).
If you’re deploying your project somewhere more remotely, without WiFi or a strong cellular network, like a farm, you’ll need another option. Something that can be deployed quickly with no overhead setup and that will transmit/receive over a long distance.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.