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.

Links:

• Wemos D1 Product Home
• Buy on AliExpress
• Micropython Download
• Wemos D1 Serial Drivers
• ESPTools
• LED Code Gist

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.