SensorNodeESP

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

Server (Hub): ESP32 (SRX882, buzzer)

Web app - interface

Client: ESP8266 & ENS160+AHT21

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

Client: ATtiny85 & STX882

ATtiny sleeps, wakes up on HIGH (test button, PIR, wires for water detection...), sends signal via STX882, goes back to sleep. Device can be battery powered.

Movement detection

Water detection

TODO

• README.md: Change images where necessary.
• Hub:
  • Create place (folder) for discontinued code that contains code that is not used anymore. Put there: attiny, hc12, stx882, bme680 projects.
  • Split Hub project into 2:
    • Hub: connected to the internet, communication with clients is done via ESP-NOW. First, create alternative version for attiny_stx882 project (Water detection).
    • Hub /wo internet: communication with clients is done via radio (HC-12, SRX882...). 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)
• Clients:
  • SCD30:
    • Check if pinButton is pressed before wait for response from airSensor (SCD30)
    • Check documantation for setting the right temperature [offset]
    • Try to use TimeSlotSend class
  • Add more sensor nodes
    • (WIP) esp32-wake-on-pin
      • Try to generate random ID each time ESP wakes up
      • Resend message couple of seconds after the first one.
      • Test if device works with PIR sensor
      • Create project folder: name, code, pictures, README.md
    • 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()...