ESP-WROOM-32S CP2102 WiFi+Bluetooth microcontroller
€6.32
Seeeduino XIAO SAMD21 Arduino compatible microcontroller - Cortex M0+
€6.93
Prototype breadboard 400 tie points Arduino OZY-60 white solderless for 2.54 mm modules
€1.02
Raspberry Pi 4 Model B 2GB RAM DualBand Wi-Fi Bluetooth 1.5GHz 1Gb Ethernet
€52.95
ESP-01S module with relay V4.0 250V 10A ESP8266 WiFi ESP01 opto-isolation
€2.98