Battery voltage is also measured via a voltage divider connected to the chip’s ADC pin. At regular intervals throughout the day, the ESP8266 polls the ATtiny13 to pull the stored sensor pulses ...
Rumors are that there will be eight-pin ESP-O1 modules hitting the streets priced as low as $1. We usually require more pins, but if medium-sized ESP32-C3 modules are priced near the ESP8266-12 ...
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