This controller is the heart of my new wateringsystem.
- Monitoring weather data (temperature, humidity and air pressure)
- Monitoring th soil moisture of the plant
- Monitoring of energy consumption
- super long deepsleep times to save energy
- easy to configurable with the help of Node-RED
- Controllable via MQTT
- widely-used sensors
- completly asynchron programming
- host by your own: complete control over your data (no external cloud service needed)
- OTA updates
- connect all parts to the ESP32
- connect power
- the ESP32 starting an own Wifi access point named "wateringsystem-{device ID}"
- connect to this Wifi with your smartphone
- use
waaateringfor Wifi password - you will redirected to a config page
- insert your Wifi and MQTT broker credentials
- click on "save"
- the ESP32 will restarting and connect to your MQTT broker
- after about 1 minute you should see a new topic in your MQTT broker
wateringsystem/{device ID}/out/infowith a lot of information in the payload
The whole module is controllable via MQTT protocol. So it's easy to integrate in existing SmartHome systems (like Home Assistant or Node-Red).
Topic: wateringsystem/{device ID}/in/{command}
| command | description | payload |
|---|---|---|
| watering | Start watering for specific duration (in milliseconds!) | { duration: number } |
| abort-watering | Abort watering before timer ends | - |
| sleep | Start deep-sleep for specific duration (in milliseconds!) | { duration: number } |
| info | Send info via MQTT topic wateringsystem/out/info package |
- |
| hard-reset | Reset config with WiFi and MQTT settings and start internal hotspot to reconfigure device. | - |
Topic: wateringsystem/{device ID}/out/{command}
| command | description | payload |
|---|---|---|
| info | status info | complex JSON. See "info-state" chapter |
| sleep | was send if sytem enter deep-sleep | { duration: number } |
| wakeup | was send if sytem wakeup from deep-sleep | reason "timer" |
| field | description | type |
|---|---|---|
| version | version number of module firmware | string |
| soilMoisture | analog value of soil-moisture sensor | number |
| system.deviceId | Unique ID of the device. Will used also in MQTT topics. | string |
| system.freeHeap | free heap memory of CPU | number |
| energy.shuntVoltage | voltage between V- and V+ (in mV) | number |
| energy.busVoltage | voltage of power input pin (in V) (optimal value between 3.6 and 4.0) | number |
| energy.current | current (in mA) | number |
| energy.power | energy consumption (in mW) | number |
| energy.loadVoltage | load voltage (in V) | number |
| network.wifiRssi | wifi signal strength (RSSI) | number |
| network.wifiQuality | quality of signal strength (value between 0 and 100%) | number |
| network.wifiSsid | SSID of connected wifi | string |
| network.ip | ip address of the module | string |
- buy sensor and ESP32
- soldering first prototype of the sketch
- test firmware
- test OTA updates
- create housing (3D print)
- create example flow with Node-RED
- add part list
- add video doc
- add WifiManager to easy setup
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