statefb/bme280-dashboard

BME280 sensing and dashboard

Requirements

• BME280
• raspberry pi zero wh

Setup

AWS

• Run following and note certificateArn

  aws iot create-keys-and-certificate \
      --certificate-pem-outfile "raspi01.cert.pem" \
      --public-key-outfile "raspi01.public.key" \
      --private-key-outfile "raspi01.private.key" \
      --set-as-active
  

• replace context.certArn of cdk.json by certificateArn
• cdk deploy RaspberrypiSenseStack --require-approval never
• cdk deploy FrontendStack --require-approval never

Raspberry pi

• Enable I2C

  • sudo raspi-config nonint do_i2c 0
    • ignore following messages:

      modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/5.4.79+/modules.dep.bin'
      modprobe: FATAL: Module i2c-dev not found in directory /lib/modules/5.4.79+

  • sudo reboot
  • raspi-config nonint get_i2c
    • if showing 0, that's ok

• Install i2c-tools

  • sudo apt install i2c-tools -y
  • i2cdetect -y 1
    • 76 will showing up

• Install IoT Greengrass

  • install aws cli
    • sudo apt install python3-pip
    • pip3 install awscli --upgrade --user
    • echo "export PATH=/home/pi/.local/bin:$PATH" >> .bashrc
    • exec $SHELL -l
    • aws --version
    • export AWS_ACCESS_KEY_ID=XXXX
    • export AWS_SECRET_ACCESS_KEY=XXXX
    • aws s3 ls
  • install nucleus
    • sudo update-alternatives --config java
    • java -version
    • curl -s https://d2s8p88vqu9w66.cloudfront.net/releases/greengrass-nucleus-latest.zip > greengrass-nucleus-latest.zip
    • unzip greengrass-nucleus-latest.zip -d GreengrassInstaller && rm greengrass-nucleus-latest.zip
  • run install command whose cfnOutput name is RaspberrypiSenseStack.GreengrassInstallCommand showing after cdk deploy
    • ex) sudo -E java -Droot .....
  • sudo gpasswd -a ggc_user dialout
  • sudo gpasswd -a ggc_user gpio

Greengrass component

• greengrass development kit install ( for PC)

  • https://docs.aws.amazon.com/greengrass/v2/developerguide/install-greengrass-development-kit-cli.html

• cd components/sensor

• gdk component build

• gdk component publish

• attach s3 get policy to core device role

  • aws iot create-policy-version \
    --policy-name GreengrassTESCertificatePolicyGreengrassV2TokenExchangeRoleAlias \
    --policy-document file://policy.json \
    --set-as-default
    

  • policy.json:

        {
        "Version": "2012-10-17",
        "Statement": [{
            "Effect": "Allow",
            "Action": "iot:AssumeRoleWithCertificate",
            "Resource":
        "arn:aws:iot:{REGION}:{ACCOUNT}:rolealias/GreengrassV2TokenExchangeRoleAlias"
        },{
            "Effect": "Allow",
            "Action": "s3:*",
            "Resource": "*"
        }]
        }
    

• deploy component to raspberrypi by management console or cli