The main function of the ATtiny is acting as a battery friendly low power co-processor for the ESP. A bit like the ULP low power co-processor of the ESP32, except with a lot more IO functions and ...
The alarm clock is based on the ESP-01 WiFi module with the ESP8266 WiFi chip. GPIO2 of the ESP-01 is simply connected to a transistor that controls an LED stripe (could be any other load). A simple ...
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