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DIY Smart Meter IR readhead — image 1
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DIY Smart Meter IR readhead

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A compact IR read head for smart meters (tested with Iskra), based on a TTL interface and an ESP32-C6.

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Category
Electronics
License
Creative Commons — Attribution — Noncommercial — Share Alike

Hello everybody,

I designed a read head for the IR interface of my smart meter. Although I developed it for an Iskra meter, it should be compatible with most standard meters.

The design uses a standard TTL optical interface board purchased on eBay together with a Seeed Studio ESP32-C6. I chose the ESP32-C6 because it provides a connector for an external UFL antenna, allowing improved Wi-Fi reception inside a meter cabinet.

The enclosure accommodates four 4 × 2 mm magnets for securely attaching the read head to the meter.

Assembly requires two M2.5 screws and two M2.5 heat-set inserts.

I currently use the device with ESPHome, but it should also be compatible with Tasmota.

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