ESP32-System-Monitoring

• Description
• Things needed
• Roadmap
• Client
• Installation
  • Logs

Description

This project should achieve the following things:

• Monitor a Linux client if it is reachable and or didn't freeze.
• If the client froze it should send an email notification.
• If the client froze it should cut its power supply shortly to force a reboot.

Things needed

• ESP32
• Linux client e.g. Raspberry Pi 5
• TP-Link Tapo P110 (optional but required for full functionality)
• Docker installed on the client
• Working WLAN infrastructure
• Platformio

Roadmap

• Make a git repository.

• Connect to the ESP32 and check if it works.

• Connect the ESP to the Wi-Fi.

• IP address is reachable form another device

• Make a heartbeat from the client to the ESP

  • Mosquitto docker for the client
  • Heartbeat script for the client
    • Filesystem
    • Internet
    • DNS
    • MQTT
    • Dockerize
  • Heartbeat script for the ESP

• Make the ESP send an email when the client goes down.

  • Make an ISR that checks the time between the heartbeats
  • Make it recognize when the system is down
  • Send email when the system is down/up/initialized

• Secure the application with a .env file

• Reverse-engineer the Tapo P110 API that controls the power state

• When several heartbeats are missed the ESP should switch the power state off and back on again to force a reboot of the client.

• Make the MQTT connection secure.

• Make a heartbeat from the ESP to the client

• Let the client send and email if there is no longer a heartbeat

Client

Installation

Copy the Heartbeat folder to the desired destination on the client. Execute the following command in the folder:

docker compose up -d

This command starts the docker containers that include the MQTT server and the heartbeat script.

Logs

To view logs from the heartbeat script have a look at /Heartbeat/data/log.txt. For logs of the MQTT server look into /Heartbeat/mosquitto/log/mosquitto.log