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2021-10-14 07:42:11 +00:00
parent 3059c14648
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+Datasheet:
+https://www.espressif.com/sites/default/files/documentation/0a-esp8266ex_datasheet_en.pdf
+Tech Reference:
+https://www.espressif.com/sites/default/files/documentation/esp8266-technical_reference_en.pdf
+PCB Design Guidelines:
+https://www.espressif.com/sites/default/files/documentation/esp8266_hardware_design_guidelines_en.pdf
+
+Pins
+====
+
+Multiplexing analog input:
+https://internetofhomethings.com/homethings/?p=530
+
+Digital:
+- has hysterisis
+- Vil = 0.25 * Vin
+- Vih = 0.75 * Vin
+
+ADC:
+- only 1 analog pin, A0
+- 10 bits, 0-1023
+- only supports 0.2 - 1.2 V, unless there's on-board voltage divider
+
+
+WeMos D1 Mini
+=============
+
+- has on board 3V3 ADC divider