hakaru

Stream the sensor data

sequenceDiagram
    participant ESP32 as ESP32
    participant Client as MQTT Client
    participant TouchSensor as Touch Sensor

    ESP32->>+Client: Start streaming data
    Client->>ESP32: Send message to sleep
    ESP32->>+ESP32: Enter deep sleep mode
    TouchSensor->>ESP32: Touch GPIO 4
    ESP32-->>-ESP32: Wake up from deep sleep
    ESP32->>+ESP32: Start booting

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Set up WiFi

1. Connect to the ESP32's WiFi AP
2. Open http://192.168.1.1
3. Select the SSID and enter the password of the WiFi network

Then the ESP32 will connect to the WiFi network and start streaming data.
The WiFi configuration will be saved in the flash memory.

Check if the ESP32 is connected to the WiFi network

ping opencmm.local

Install Mosquitto MQTT Broker

ref. https://www.vultr.com/docs/install-mosquitto-mqtt-broker-on-ubuntu-20-04-server/

/etc/mosquitto/conf.d/default.conf

listener 1883 0.0.0.0
allow_anonymous false
password_file /etc/mosquitto/passwd

Receive data

mosquitto_sub -t 'sensor/data' -v -h 192.168.10.104 -u opencmm -P opencmm

Send command to ESP32

Update configuration

mosquitto_pub -t 'sensor/control' -h 192.168.10.104 -u opencmm -P opencmm -m '{"command": "config", "interval": 1000, "threshold": 100 }'

Go to sleep

mosquitto_pub -t 'sensor/control' -h 192.168.10.104 -u opencmm -P opencmm -m '{"command": "deepSleep" }'

Reset WiFi

mosquitto_pub -t 'sensor/control' -h 192.168.10.104 -u opencmm -P opencmm -m '{"command": "resetWifi" }'