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

Windows desktop app: backup logs (data from sensors)

Client: ESP8266 & ENS160+AHT21

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

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:
  • Add new images of the hub and clients
• Hub:
  • (WIP) 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...)
  • (testing) Create a mechanisam (class) that will prevent hub from accepting repeated messages from clients. SimpleEvent messages with the same ID, batches of messages from the same client caused by failed logic in retrying (this should be logged as an error).
  • Remove all references to hc12 and stx882 from code.
  • 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
• if type == SimpleEvent - add MAC and name to devices in ctor of SimpleEventHandler
• 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()...