January 29, 2018

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Video Tutorial: Flashing Micropython on a Wemos D1 Mini

Welcome to Episodes #01 of the new Obviate.io video series where we’ll be flashing Micropython 1.9.3 onto a Wemos D1 Mini ( ESP8266 ) development board using Apple macOS.


Commands Run:

  • Installing ESPTool: pip install esptool or sudo easy_install esptool
  • Find the esp8266 when plugged in: ls /dev/cu.*
  • Erase Firmware: esptool.py --port /dev/cu.wchusbserial1430 erase_flash
  • Write new Firmware: esptool.py --port /dev/cu.wchusbserial1430 --baud 115200 write_flash --flash_size=detect 0 ~/Downloads/esp8266-20171101-v1.9.3.bin
  • Access Micropython REPL: screen /dev/cu.wchusbserial1430 115200

In the REPL, if you’d like to copy and paste the code snipped, you must press ctrl+e to enter the special paste mode. Then paste the code from Github Gist. Then press ctrl+d to begin executing the code. To stop the code execution hit ctrl+c. To exit screen hit ctrl+a+\ .

Hopefully this tutorial was helpful. If you enjoyed it, please like / subscribe / comment. Let me know what you’d like to see next.