Datyson 1.25" Telescope Digital Electronic Eyepiece Camera for Astrophotography USB Port, Useful USB Eyepiece Camera for Lunar and Planetary Shots Plug and Play : Amazon.ca: Electronics
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Kamstrup USB with Optical Readout Head Type 6699099 | eBay
Teknisk beskrivelse
REQUEST] Water flow metering reading of IEC 62056-21 protocol smart water meters via photodiode/infrared optical eye reader header? · Issue #1402 · esphome/feature-requests · GitHub