The Picoclick C3T is a tiny WiFi and BLE IoT button for several applications. Originally designed for smart home things, the Picoclick can also be used as an actuator for IFTTT automations or as an MQTT device. It is based on the single core ESP32-C3 RISC-V processor and therefore comes with tons of useful features. With dimensions of only 10.5mm by 18mm the C3T not only the smallest one in the family of the Picoclicks, it is also the smallest device I have created so far.
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