TRIGGERcmd Control of RPi

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NB: 27th Feb 2022 https://davidjones.sportronics.com.au is fixed now. Thx

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Latest: There is now a Nuget Package for the library. Additional Console app uses that rather than the library source.
Install-Package WhatCanISayTRIGGERcmd -Version 1.0.2
PS WhatCanISay app builds and runs OK on WSL: Windows Subsystem for Linux (Debian)
Nb: Solution file for the app is now in the root folder.

Trigger commands in .NET app running on Raspberry Pi from Google Nest with sensor values spoken on a Google Nest (Mini) via a PC.

About

It was said that you can't get the temperature etc from a RPi, from a .Net app there, enunciated on a Google Nest as a Hey Google, request from the Nest. Well I've done it! It does though require an intervening Windows device to relay (cast) the text to the Nest.

Requirements

• A Google Nest (I used a mini) with Home setup.
• RPi, I used a 3B+
• Install Debian OS on RPi
• Install the .NET SDK or the .NET Runtime on Debian
• TRIGGERcmd installed on RPi as per here
  • I found the setup script didn't work, but manual wasn't too difficult.
• TRIGGERcmd installed on PC. Start here
  • Found you do need a subscription but its not costly
  • Follow instructions on the Instruction page
  • Get the token
• Cast installed on PC from here
• Insert the token in the curl command in Sensor_DHT1Wire.sh, Sensor_BME280.sh and what.sh on RPi
• Files as below installed copied to PC/RPi
• Clone djaus2/DNETCoreGPIO ro RPi and setup for .Net6 to build there or build on PC and deploy to RPi.
  • Add to PATH on RPi
• Make the RPi the default TRIGGERcmd compter.

Running TRIGGERcmd agent

• On PC: The agent should auto start.
• On the RPi:in a command shell run triggercmdagent and enter the token when prompted.
  • Note trstart.sh and tr.sh commands as below

Files

PC

• .TRIGGERcmdData
  • commands.json
    • Add these via the TRIGGERcmds Text/GUI editor (Hidden icons from Taskbar). after TRIGGERcmd installation on PC
    • Echo command takes a string as a parameter and calls cast to enunciate it on Google Nest
    • WhatCanISay[Brief/Detail/Relay] command interogates local commands.json and speaks voice commands via Google Nest as with Echo.
      • Command interogates local commands.json and forwards through PC (echo command there)
        • ... to speak voice commands via Google Nest as with Echo. = Brief just lists the command voices
      • Detail:
        • If a command has a "description" property, that is also spoken
        • If On/Off thenthat is explained.
      • Used by RPi to forward message through PC
• temp
  • Place contents in c:\temp

RPi

• .TRIGGERcmdData
  • commands.json
    • Add the commands you want using Text editor to ~/.TRIGGERcmdData after TRIGGERcmd installation on RPi
      • Sensor: Calls Sensor_DHT1Wire.sh
        • Gets called from Nest with Hey Google, start Sensor"
        • Actions DNETCoreGPIO 14 as above which writes/overwrites Temperature and Humidity string to /tmp/temperature.txt
        • String is read back in and curl command created to call echo on PC with the string as its parameter
        • The read temperature and humidity are enuncitaed on the Google Nest
      • Local Sensor: Calls speaklocal_DHT1Wire.sh
        • Gets called from Nest with Hey Google, start local"
        • As per Sensor but T2S is used to output directly to RPi Audio.
      • BME280: Calls Sensor_BME280.sh
        • Gets called from Nest with Hey Google, start temp"
        • Actions DNETCoreGPIO 15 as above which writes/overwrites Temperature, Pressure and Humidity (and Altitude which is erroneous) string to /tmp/temperature.txt
        • String is read back in and curl command created to call echo on PC with the string as its parameter
        • The read temperature and humidity are enuncitaed on the Google Nest
      • BME280 Local: Calls speaklocal_DHT1Wire.sh
        • Gets called from Nest with Hey Google, start bosh"
        • As per temp but T2S is used to output directly to RPi Audio.
      • DNETMotorEnable: DNETCoreGPIO 21 and 22 as above
        • Gets called from Nest with Hey Google, Start Motor
          • Means enable motor
        • And Hey Google, Stop Motor
          • Means disable motor
      • DNETMotorDirection: DNETCoreGPIO 23 and 24 as above
        • Gets called from Nest with Hey Google, Start Spin
          • Means forward if enabled.
        • And Hey Google, Stop Spin
          • Means reverse if enabled.
      • DNETRelay DNETCoreGPIO 11 and 12 as above
        • Gets called from Nest with Hey Google, Start Relay
          • Means switch on relay.
        • And Hey Google, Stop relay
          • Means switch off relay.
      • WhatCanISay[Brief/Detail]
        • Command interogates local commands.json and forwards through PC (echo command there)
          • ... to speak voice commands via Google Nest as with Echo. = Brief just lists the command voices
        • Detail:
          • If a command has a "description" property, that is also spoken
          • If On/Off thenthat is explained.
      • There are other commands used by Azure IoT Hub (later)
• home_pi_
  • Place following .sh files in ~ and chmod +x each.
    • Sensor_DHT1Wire.sh
      • Place in ~ and chmod +x
      • Scripts all of the functionality for the Sensor command as below.
    • speaklocal_DHT1Wire.sh
      • Place in ~ and chmod +
      • As per Sensor_DHT1Wire.sh but Text to Speech is used directly on RPi
      • Ref: How To Make Your Raspberry Pi Speak
      • sudo apt-get install espeak
    • Sensor_BME280.sh/speaklocal_BME280.sh
      • As per DHT1Wire but using BME280 sensor
  • DNETCoreGPIO.sh
    • Calls DNETCoreGPIO app with integer parameter as below.
    • DNETCoreGPIO: Is .NET6.0 C# app
      • Repository on GitHub here: djaus2/DNETCoreGPIO
        • Clone with git clone github.com/djaus2/DNETCoreGPI in a folder on RPi in command shell
        • Build in folder with dotnet build -c RELEASE DNETCoreGPIO.csproj
        • Need to add path to built DNETCoreGPIO something like projectdirectory/bin/Debug/Net6
      • Called with various parameters by TRIGGERcmd on RPi:
        • 11.12 Turn relay on/off
        • 14: Get Temperature and Humidity from DHT22 1 Wire mode
        • 15: Get Temperature, Presssure and Humidity from BME280 (Altitude also but is erroneous).
        • 21: Motor Forward
        • 22: Motor Reverse
        • 23: Motor Enable
        • 24: Motor Disable
  • what-[voices/detail].sh
    • As per sensor_xx.sh scripts but calls whatcanisay app instead of DNETCoreGPIO app.
  • trstart.sh
    • Start TRIGGERcmd agent on RPi
    • Need user token
  • tr.sh
    • Restarts stopped TRIGGERcmd on RPi (token not required).

Apps

• WhatCanISay
  • Can ask a device,if set up there "Hey Google, start Say".
    • Or "Hey Google,start Detail".
  • Will tell you what voice commands you can say on a device.
    • Second option tells you exactly what to say foreach command.
  • Works on PC (uses cast)
  • On RPi forwards through Echo on PC. 2Do

Coming: Integrating with Azure IoT Hub