ESP8266 (English Wikipedia)

"ESP8266 Overview". Espressif Systems. Retrieved 2017-10-02.
"Espressif Announces ESP8285 Wi-Fi Chip for Wearable Devices". Espressif Systems. Mar 9, 2016. Archived from the original on 2016-07-25. Retrieved 2016-07-10.
"ESP8266 Non-OS SDK API Reference, Chapter 2.4. System Performance" (PDF). espressif.com. Espressif Systems.
The flash mode and frequency directly influence the code execution speed. Setting the flash to a higher frequency and QIO mode may produce the best results in terms of performance, though it costs in terms of power consumption. "ESP8266 Non-OS SDK API Reference" (PDF). espressif.com. Espressif Systems.
Success varies chip to chip.^{[citation needed]}
"ESP8266 Non-OS SDK API Reference, Chapter 2.5. System Memory" (PDF). espressif.com. Espressif Systems.
"ESP8266 Technical Reference, Version 1.7" (PDF). Espressif Systems. Retrieved 2021-04-22.
"Espressif ESP-WROOM-02". Espressif Systems. Retrieved 2015-07-29.
"ESP-WROOM-02D/ESP-WROOM-02U Datasheet" (PDF). Espressif Systems. Archived from the original (PDF) on 2017-12-01. Retrieved 2017-11-25.
"ESP-WROOM-S2 Datasheet" (PDF). Espressif Systems. Archived from the original (PDF) on 2017-10-08. Retrieved 2017-10-08.

espressolite.com

"KNEWRON smartWIFI". KNEWRON. Archived from the original on November 14, 2016. Retrieved 2016-03-04.

"Mongoose OS Documentation". Cesanta. Archived from the original on 2018-01-27. Retrieved 2017-10-02.

SwitchDoc Labs. "Grove WeatherPlus". Archived from the original on 2021-04-14. Retrieved 2018-06-30.

"Espressif Announces ESP8285 Wi-Fi Chip for Wearable Devices". Espressif Systems. Mar 9, 2016. Archived from the original on 2016-07-25. Retrieved 2016-07-10.
"Mongoose OS Documentation". Cesanta. Archived from the original on 2018-01-27. Retrieved 2017-10-02.
"ESP-WROOM-02D/ESP-WROOM-02U Datasheet" (PDF). Espressif Systems. Archived from the original (PDF) on 2017-12-01. Retrieved 2017-11-25.
"ESP-WROOM-S2 Datasheet" (PDF). Espressif Systems. Archived from the original (PDF) on 2017-10-08. Retrieved 2017-10-08.
SwitchDoc Labs. "Grove WeatherPlus". Archived from the original on 2021-04-14. Retrieved 2018-06-30.
"WeMos D1". WeMos. Archived from the original on 2017-09-03. Retrieved 2016-11-30.
"WeMos D1 R2". WeMos. Archived from the original on 2017-09-03. Retrieved 2016-01-05.
"WeMos D1 mini". WeMos. Archived from the original on 2017-07-02. Retrieved 2017-06-29.
"WeMos D1 mini Lite". WeMos. Archived from the original on 2017-06-06. Retrieved 2017-06-29.
"WeMos D1 mini Pro". WeMos. Archived from the original on 2017-08-27. Retrieved 2017-06-29.
"Geek Wave Solution ESP8266-WROOM-02-IOT WiFi Development Board". Geek Wave Solution. Archived from the original on 2017-09-04. Retrieved 2017-09-04.

"WeMos D1". WeMos. Archived from the original on 2017-09-03. Retrieved 2016-11-30.
"WeMos D1 R2". WeMos. Archived from the original on 2017-09-03. Retrieved 2016-01-05.
"WeMos D1 mini". WeMos. Archived from the original on 2017-07-02. Retrieved 2017-06-29.
"WeMos D1 mini Lite". WeMos. Archived from the original on 2017-06-06. Retrieved 2017-06-29.
"WeMos D1 mini Pro". WeMos. Archived from the original on 2017-08-27. Retrieved 2017-06-29.

Luigi F. Cerfeda (June 15, 2017). "Python for ESP8266 in just a few clicks using Zerynth". Zerynth (Kinzica Ventures LLC).