datacake

Connect your ESP32s to Datacake and visualize your data in the Datacake dashboard.

Trying it out

First you need to install the Datacake service on your ESP32 using Jaguar. The service runs in a separate container and handles the secure connection to the MQTT broker.

jag container install datacake src/service.toit \
    -D datacake.api.token=...                   \
    -D datacake.device.id=...                   \
    -D datacake.product.slug=...

Once you've installed the service on your device, you can run examples like:

jag run examples/temperature.toit

If you follow along using jag monitor, you'll see output like this:

[jaguar] INFO: program da35d69f-d62e-5297-ae10-a54534123db6 started
[datacake.mqtt] INFO: connected {host: mqtt.datacake.co, port: 8883, client: ...}
[datacake.mqtt] INFO: packet published {field: TEMPERATURE, value: 23.7}
[jaguar] INFO: program da35d69f-d62e-5297-ae10-a54534123db6 stopped
[datacake.mqtt] INFO: disconnected {host: mqtt.datacake.co, port: 8883, client: ...}

The code for the example is fairly straightforward.

Using Datacake in your own projects

If you want to use Datacake in your own Toit-based project, you can install the package in your project directory using:

cd $PROJECT_DIRECTORY
jag pkg install datacake

and import and use it like this:

import datacake

main:
  client := datacake.connect
  temperature := datacake.Float "TEMPERATURE" --precision=1
  try:
    20.repeat:
      temperature.publish client (random 150 350) / 10.0
      sleep --ms=2_000
  finally:
    client.close

You will still need to have the service running.