https://github.com/bvujovic/sensornodeesp

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

alarm-system arduino esp8266 gas-sensor pir pir-sensor sensors

Last synced: 2 months ago
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Data from sensor (PIR, CO2, smoke/water detectors...) is logged and sometimes sent to user (WhatsApp message, E-mail).

• Host: GitHub
• URL: https://github.com/bvujovic/sensornodeesp
• Owner: bvujovic
• Created: 2023-06-15T16:49:15.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2025-07-02T14:22:25.000Z (about 1 year ago)
• Last Synced: 2025-07-06T21:44:07.225Z (about 1 year ago)
• Topics: alarm-system, arduino, esp8266, gas-sensor, pir, pir-sensor, sensors
• Language: C++
• Homepage:
• Size: 3.69 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

          
# 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

![Server: ESP32 (SRX882, buzzer)](projects/hub/docs/esp32_hub_device.jpg)

## Web app - interface

![Web app - interface](projects/hub/docs/web_page_interface.png)

## Windows desktop app: backup logs (data from sensors)

![Windows desktop app](_WinBackupApp/WinBackupApp.png)

## Air Quality Data

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

### SCD30 - CO2

![Client: SCD30 & CO2](projects/_clients/scd30/wemos_scd30.jpg)

### ENS160, DHT22 - air quality data (temp, hum, TVOC)

![Client: ESP8266 & ENS160+AHT21](projects/_clients/ens160_dht22/docs/wemos_ens160_dht22_client_finished.jpg)

## 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

![ESP32, Li-Ion 18650 battery, water detection wires](projects/_clients/esp32-wake-on-pin/docs/esp32-wake-on-pin_device.jpg)

## TODO

- [ ] Hub:

    - [ ] (TEST) Does millis command returns ulong millis() on hub/server? Use retrying_retryer.cpp

    - [ ] 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, http...). Maybe it could have its own wireless network for web app access?

    - [ ] Web App:

        - [ ] Improve interface (chart.js disappears, shrinks)

- [ ] Clients:

    - [ ] ClientLogger

        - [ ] Use it in SCD30 and ENS&DHT projects

    - [ ] (WIP) Put retrying logic in a class: Retryer

    - [ ] TimeSlotSend

        - [ ] Change getDeepSleepTime() so that it takes into account wake time and time spent in sending data

    - [ ] (OPT) Put TSS, LoggerMin and retrying logic in a class that will be used by most clients that report data regularly to the hub

    - [ ] (WIP) SCD30:

        - [ ] Button click: print log on Serial and send data (prev data or wait for new?) to the hub

    - [ ] esp32-wake-on-pin

        - [ ] Test this code with SuperMini modules (C3, C6, S3)

    - [ ] 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[]

    - OnDataRecv(): if (p->type == SensorType::...)

- lib/Common/src/ToString.cpp:

    - Add new members to arrays: StrSensorTypes[], SensorTypesComment[]

- 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()...