The remote sends commands to the servant.
Firstly - of course - you will need an ESP32. ESP32's come in all sorts and shapes. In my case, I will be using an Espressif ESP32_DevKitc_V4, which is a very common ESP.
In order to be able to use MicroPython, we will be using Python. This means you need to install Python (or at least pip) before being able to start messing around with MicroPython. I highly recommend getting the latest stable Python 3+.
After installation, you can verify if your installation works by typing this command in a fresh Command Prompt.
python -VThe output for me implies that I am using Python 3.8.5.
C:\Users\valen>python -V
Python 3.8.5First get the appropriate firmware for your board. In my case, I use a specific v4.x version: GENERIC : esp32-idf4-20200902-v1.13.bin.
Secondly, we need to install the esptool:
pip install esptool
⚠️ Make sure yourESP32is properly connected to your computer.
First we need to erase the current firmware. To be able to do that, we need to know to which port our ESP32 is connected to. Open the device manager and look in the Ports view for an indication of your ESP32. Mine apparently is registered at port COM4.
Now that we know what port our ESP32 is connected to, we can remove the current firmware:
esptool.py --port COM4 erase_flashThe output should look similar to this:
esptool.py v3.0
Serial port COM4
Connecting....
Detecting chip type... ESP32
Chip is ESP32-D0WD (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 8c:aa:b5:b5:86:50
Uploading stub...
Running stub...
Stub running...
Erasing flash (this may take a while)...
Chip erase completed successfully in 17.0s
Hard resetting via RTS pin...Then we write our downloaded firmware to the ESP32.
esptool.py --chip esp32 --port COM4 write_flash -z 0x1000 esp32-idf4-20200902-v1.13.binThe writing itself might take a couple of minutes. This should be the output more or less:
esptool.py v3.0
Serial port COM4
Connecting.....
Chip is ESP32-D0WD (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 8c:aa:b5:b5:86:50
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Compressed 1456544 bytes to 928552...
Wrote 1456544 bytes (928552 compressed) at 0x00001000 in 82.9 seconds (effective 140.6 kbit/s)...
Hash of data verified.
Leaving...
Hard resetting via RTS pin...Now we can test our firmware installation by connection to the COM4 port at a Baud rate of 115200. There are a couple of tools out there like TeraTerm and PuTTY (and mayne more). Since PuTTY is a very well known tool and is very easy to use, I will stick to that.
Install PuTTY, open it and create a new session with these settings (save the session):
When you open the session, and don't see >>> or see weird output, then reset the ESP32 by pressing the reset button on the device (EN button).
By following these steps, we now have opened a REPL connection.
We can now start typing Python and MicroPython commands. Try a simple Hello world:
print("Hello ESP32!")If the output is what we expect, then we can move on to the real work.
pip install adafruit-ampy ampy --port COM4 put src/main.py
https://www.studiopieters.nl/esp32-pinout/ https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/index.html
TTGO
http://www.lilygo.cn/prod_view.aspx?TypeId=50033&Id=1126&FId=t3:50033:3
https://www.instructables.com/TTGO-color-Display-With-Micropython-TTGO-T-display/
# erase flash
esptool.py --port COM7 erase_flash
# flash firmware
cd workspaces/esptool
python esptool.py --chip esp32 --port COM7 --baud 460800 --before default_reset --after no_reset write_flash -z --flash_mode dio --flash_freq 40m --flash_size detect 0x1000 bootloader/bootloader.bin 0xf000 phy_init_data.bin 0x10000 MicroPython.bin 0x8000 partitions_mpy.bin
# upload main scripth
ampy --port COM7 put remote/src/esp32ttgo/main.py
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent