Cloudflare FUTON App demo

This is the demo application for following purpose

• Record when you have dried the Futon (Japanese mattress)
• Notify when you haven't dried the Futon for a while

Components

• Cloudflare Workers
• Soracom (SORACOM LTE-M Button, SORACOM Beam)
• Slack

Architecture

                                         +----------------------------------+
                                         |Cloudflare_Workers                |
                                         |                                  |
                                         | +-------+  +-----------------+   |
                                         | |Trigger+->|futon-dry-checker+---+---------------+
                                         | +-------+  +-------+---------+   |               |
                                         |                    |             |               |
                                         |                  +-v-+           |   +-----------v----------+
                                         |                  |KV |           |   |Slack_Incoming_Webhook|
                                         |                  +-^-+           |   +-----------^----------+
                                         |                    |             |               |
+----------------------+  +------------+ |           +--------+---------+   |               |
| SORACOM_LTE-m_Button +->|SORACOM_Beam+-+---------->|futon-dry-recorder+---+---------------+
+----------------------+  +------------+ |           +------------------+   |
                                         |                                  |
                                         +----------------------------------+

Prerequisite

This demo application was built for specific IoT Device (SORACOM LTE-M Button for Enterprise, which is only sold in Japan) and Soracom (JP website) service.

Especially, authentication in futon-dry-recoder uses Soracom Beam signature verification (doc: EN / JA).

The device has 3 click type (SINGLE, DOUBLE, and LONG). This application assigns SINGLE for kid, DOUBLE for mom, and LONG for dad to record the futon dry.

How to build

You can build this application with Wrangler. Here's the sample setup

wrangler publish futon-dry-checker/src/index.ts 
wrangler publish futon-dry-recorder/src/index.ts 
wrangler secret put -c futon-dry-recorder/wrangler.toml --name futon-dry-recorder PRESHARED_KEY
wrangler kv:namespace create "FUTON_KV"
# note: ${id} is the namespace ID of KV. 
wrangler kv:key put SLACK_URL "YOUR_SLACK_INCOMING_WEBHOOK_URL" --namespace-id ${id}
wrangler kv:key put DRY_CYCLE_SECOND "86400000" --namespace-id ${id}

If you want to test Workers locally, you also need to set up KV for preview namespace.

wrangler kv:namespace create "FUTON_KV" --preview
# note: ${id} is the namespace ID of KV.
wrangler kv:key put SLACK_URL "YOUR_SLACK_INCOMING_WEBHOOK_URL" --namespace-id ${id}
wrangler kv:key put DRY_CYCLE_SECOND "86400000" --namespace-id ${id}