SigmaStudio TCPIP Channel Tools Box

What is this?

• This is a Python package, with which you can:
  • Remotely control SigmaDSP through TCP/IP channel.
    • With SigmaStudio or Python programs.
  • Use ESP32 / PC as a client.
  • Use ESP32 / PC as the server.
  • Can also read data from SigmaDSP over TCP/IP channel (with Python programs).
  • Can read/write EEPROM.

Why?

• I was playing with SigmaDSP (ADAU1701/ADAU1401), and often need to switch between USBi and FTDI FT232H.
• With SigmaDSP TCP/IP channel, SigmaStudio and Python programs can share the same means to access SigmaDSP, no more switching.
• Remote access is always a huge advantage:
  • Can control any SigmaDSP no matter where it is, as long as it's TCP/IP reachable. Very convenient for maintenance.
  • Configurations can be modified and deployed over multiple SigmaDSP devices on-demand, with just a few lines of code.
  • No need to squeeze huge code into a tiny MCU (like ESP32), parameters can be calculated remotely and deployed onto devices.
  • UI controls (like push buttons) no longer need to be "on-device", you can control SigmaDSP with just your phone.

Design and Features

• Coverage of SigmaDSP's memory space:
  • Can access data of program RAM, parameter RAM, and also EEPROM, just assign the address to read/write.
• Can also read data from SigmaDSP
  • Not only writing data to, but can also read data from SigmaDSP via TCP/IP channel (with Python programs).
• Support "reset" command:
  • With ESP32 as the server, SigmaDSP and ESP32 itself will be reset upon receiving the "reset" command.
• A client can be:
  • A PC running SigmaStudio
  • A PC running Python programs
  • An ESP32 running MicroPython
  • A smart phone
• A server can be:
  • A PC with Python environment
    • Using USB-I2C converter (like FTDI FT232H) to access SigmaDSP.
    • Using USBi as a USB-I2C converter to access SigmaDSP.
  • An ESP32 with MicroPython environment
    • Using its I2C port to access SigmaDSP.
• Portability:
  • The same package can be used on PC / ESP32 without modification required.

How to use it

• For using ESP32 as the server:
  • Download TCPi_uPy.rar.
  • Unzip it and edit the following items in file config.py:
    • LED, on your ESP32 module:
      • ON_BOARD_LED_PIN_NO, ON_BOARD_LED_HIGH_IS_ON
    • I2C connection:
      • I2C_SCL_PIN_ID, I2C_SDA_PIN_ID: with which pins the ESP32 should use to connect with ADAU1701.
      • Avoid some pins of ESP32, see ESP32 GPIO guide.
    • WiFi:
      • SSID, PASSWORD
  • Upload all files to ESP32.
  • In ESP32's terminal interface, type import test_tcpi_upy, it will show its IP when the WiFi connection is established.
    • The default port number is 8086.
    • You can write import test_tcpi_upy into file main.py, so it will run as a Sigma TCP/IP channel server after each boot.
  • Follow AD's instructions for connecting the server with SigmaStudio.
• Please also see here and here for other examples.

Test Results

• Control SigmaDSP with SigmaStudio through TCP/IP Channel, using ESP32 as the server
• Control SigmaDSP with Python programs through TCP/IP Channel, using ESP32 as the server

Supported Chips

• ADAU1701
• ADAU1702
• ADAU1401
• ADAU1401A

Limitations

• Not high speed, obvious latency.
• Need more memory to accommodate the data SigmaStudio uploads all at once. ESP32 with 8MB PSRAM is preferred.

Dependencies

• Utilities