ESP32 MicroPython Blink
Step 1: Why? The Purpose.
Load MicroPython firmware in ESP32 and turns the built-in LED on and off by using python command.
Step 2: How? The Process.
Check / Install Python3.
Install ESP Tools.
Erase the flash memory of ESP32 and Load the MicroPython.
Install Rshell for communication with ESP32 Board.
Use repl to blink the built-in led.
Step 3: What? The Result.
Verify "What we Get" by "Why we are Doing".
Step 1: Check whether Python3 is Installed or Not. If Not, Install it.
Click Here to Download Python Installer
Note: Do not install Python2.
Step2: Install ESPTOOLS.
cmd> pip install esptool
Note: don't upgrade pip to 20 version.
Check the esptool help command:
cmd> esptool.py -h
Commands of Interest:
-h, -p PORT, flash_id, erase_flash, write_flash
Step 3a: Download and Install CP210x driver
Step 3b: Connect the ESP32 board and find out the com port number.
Step 3c: Display the esp32 board info.
cmd> esptool.py -p COM3 flash_id
Note: While try to connecting, you have to press the boot button for few seconds until unless connection established.
Replace the COM3 with your COM PORT NUMBER.
Step 3d: download the latest stable version of MicroPython for ESP32.
Step 3e: Erase the flash memory of ESP32.
cmd> esptool.py -c esp32 -p COM3 erase_flash
Note: Replace COM3 with your COM PORT Number.
Step 3f: Load MicroPython in ESP32.
cmd> esptool.py -c esp32 -p COM3 -b 460800 write_flash -z 0x1000 D:\RoboticsClasses\ESP32\esp32-idf3-20200902-v1.13.bin
Note: replace COM3 and bin file with address with your COM and bin file with address.
Step4: Install rshell for communication with ESP32.
cmd> pip install rshell
Check the rshell help command:
cmd> esptool.py -h
Step 5: Communicate with esp32 board and control LED.
cmd> rshell -p COM3
cmd> boards
cmd> cd /pyboard
cmd> ls
cmd> repl
>>> print("Hello!")
>>> from machine import Pin
>>> p2 = Pin(2, Pin.OUT)
>>> p2.on()
>>> p2.off()
Knowledge Base:
Inside /pyboard we have "boot.py" file. Don't delete it or mesh with it.