IoT workshop #153

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rasmus · 2025-01-12T17:26:32Z

rasmus commented

2025-01-12 17:26:32 +00:00

"Things to the Internet, not the other way around"

Assume little electronics skills. Sensors usually can do one thing, are expensive, and with WiFi problems (too many). Connecting basic sensors (temp-hum, door contacts, motion) to basic outputs (washing machine remote start and status).

Basing things on ESPs. WiFi must be 2.4 GHz, not Telia X* (OpenWrt: must NOT have Enable key reinstallation (KRACK) countermeasures enabled). Bring out alternatives, MATTER (etc) bridges.

Hosting (and not! HomeKit? other clouds?) possibilities. On-prem machines are much more resilient against network failures. Updates, dealing with breakage, finite state machines, and resiliency against failure (network, restarts, downtime).

Basic GPIO. Making dumb smart on your own terms, 'timers', start 1h before I arrive home without knowing when I want to go home.
Adding in-line Shelly 1PM to boiler, floor heating. Risks with moving from/to the property (defaults, instructions, bypassing, undoing).
Adding a detached temp sensor to an electric heater. Sensors: When has laundry dried? Plugs (repurposable): lights,
Power monitoring for switches is usually same vs without, versatility. Light bulbs have bad light quality, are easy to get frustrated with.

"Things to the Internet, not the other way around" Assume little electronics skills. Sensors usually can do one thing, are expensive, and with WiFi problems (too many). Connecting basic sensors (temp-hum, door contacts, motion) to basic outputs (washing machine remote start and status). Basing things on ESPs. WiFi must be 2.4 GHz, not Telia X* (OpenWrt: must NOT have `Enable key reinstallation (KRACK) countermeasures` enabled). Bring out alternatives, MATTER (etc) bridges. Hosting (and not! HomeKit? other clouds?) possibilities. On-prem machines are much more resilient against network failures. Updates, dealing with breakage, finite state machines, and resiliency against failure (network, restarts, downtime). - Basic GPIO. Making dumb smart on your own terms, 'timers', start 1h before I arrive home without knowing when I want to go home. - Adding in-line Shelly 1PM to boiler, floor heating. Risks with moving from/to the property (defaults, instructions, bypassing, undoing). - Adding a detached temp sensor to an electric heater. Sensors: When has laundry dried? Plugs (repurposable): lights, - Power monitoring for switches is usually same vs without, versatility. Light bulbs have bad light quality, are easy to get frustrated with.

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Reference: k-space/todo#153