SensorNodeESP

Data from sensor (PIR, CO2, smoke/water detectors...) is logged and sometimes sent to user (WhatsApp message, E-mail).

Server (Hub): ESP32 w/ buzzer

Web app - interface

Windows desktop app: backup logs (data from sensors)

Air Quality Data

ESP wakes up every 10 minutes and sends data from sensors to the hub (server) via ESP-NOW.

SCD30 - CO2

...

ENS160, DHT22 - air quality data

Client: ESP32, Li-Ion 18650 battery, ESP-NOW

ESP32 device wakes on a pin event (e.g. wires are submerged, PIR signals HIGH...), sends an ESP-NOW message to a predefined MAC address (hub) and then goes back to deep sleep.

Water detection

TODO

• README.md:
  • (WIP) Add new images of the hub and clients
• Hub:
  • Improve SimpleEvent handling in the loop() of main_hub.cpp. Handle ID of the message, log and send to WA message text, try to add more clients (diff devices, messages...)
  • Improve (with logging number of repeated messages) a mechanisam (class or a function) that will prevent hub from accepting repeated messages from clients: batches of messages from the same client caused by failed logic in retrying (this should be logged as an error).
  • Make 2nd version of Hub project - Hub /wo internet for places without internet access or with unknown net credentials. Communication with clients is done via ESP-NOW or radio (HC-12, LoRa...). Maybe it could have its own wireless network for web app access?
    • Test if it's possible for 2 ESP32's to communicate /wo (known) WiFi network. If it's possible, create project with 2 simple parts: client (reacts on some simple event e.g. PIR) and server (beeps when ESP-NOW msg from client is received)
  • Web App:
    • Improve interface (chart.js disappears, shrinks)
  • Add 5V buzzer (with transistor) for louder sound notifications
• Clients:
  • (WIP) SCD30:
    • Save to log file any indication of an error. Make sure it can be read easily.
      • Try to solve logged issues by retrying functions that failed. If there is no logged issues and there is still missing data - maybe it's because of the power supply (not enough current).
    • Try to use TimeSlotSend class
    • Add an image of the device and a README.md file to the project.
  • esp32-wake-on-pin
    • Test this code with ESP32-C6 SuperMini when it arrives
  • Add more sensor nodes
    • Microphone (noise levels)

Add new client routine

• my_esp_now.h:
  • setPeers(): add new setPeer() call
    • setPeer(): set parameters: mac address, sensor type, device
  • Increase length of peers array: peer_info peers[]
  • Add new members to arrays: StrSensorTypes[], SensorTypesComment[]
  • OnDataRecv(): if (p->type == SensorType::...)
• Enums.h: Add new members to SensorType, Device
• index.html:
  • CmbChartParamsChange(): adjusting chart for sensors with temp and hum
  • lastChartParam: add default property for new sensor

Links

ESP-NOW

• https://randomnerdtutorials.com/esp-now-two-way-communication-esp32/
• https://randomnerdtutorials.com/esp-now-two-way-communication-esp8266-nodemcu/
• https://randomnerdtutorials.com/esp-now-auto-pairing-esp32-esp8266/
• https://randomnerdtutorials.com/esp32-esp-now-wi-fi-web-server/
• https://rntlab.com/question/esp-now-gateway-wifi_mode_sta-with-a-wifi-router/
• https://forum.arduino.cc/t/use-esp-now-and-wifi-simultaneously-on-esp32/1034555/16

Remarks

• ESP-NOW communication works if WiFi channel on the router is set to 1. There might be ways to fix that by using wifi_promiscuous_enable()...