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ESP8266: Difference between revisions
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A series of 32-bit microcontroller units from [https://www.espressif.com/ Espressif], followed by the [[ESP32]]. | A series of 32-bit microcontroller units from [https://www.espressif.com/ Espressif], followed by the [[ESP32]]. The first generation of the NodeMCU SoC was based around ESP8266. | ||
==Notes== | |||
* There is only one (10-bit) ADC, and it reports values between [0, 1], ''not'' [0, 3.3]. This is not a scaling--the input voltage should not exceed 1V. | |||
** This is not true for e.g. the NodeMCU, which [https://www.electronicwings.com/nodemcu/nodemcu-adc-with-arduino-ide applies a divider network] to scale the 3.3V down to 1V. This allows supplying 3.3V to the external device. | |||
** On the NodeMCU, this ADC can read the battery voltage instead of a connected external device. This is set in firmware. | |||
==External links== | ==External links== | ||
Revision as of 05:36, 26 November 2022
A series of 32-bit microcontroller units from Espressif, followed by the ESP32. The first generation of the NodeMCU SoC was based around ESP8266.
Notes
- There is only one (10-bit) ADC, and it reports values between [0, 1], not [0, 3.3]. This is not a scaling--the input voltage should not exceed 1V.
- This is not true for e.g. the NodeMCU, which applies a divider network to scale the 3.3V down to 1V. This allows supplying 3.3V to the external device.
- On the NodeMCU, this ADC can read the battery voltage instead of a connected external device. This is set in firmware.
External links
- ESP8266 on Wikipedia
