xiaomi-LYWSD03MMC-to-solar-meter
Turn a Xiaomi LYWSD03MMC humidity monitor into a live solar meter for Home Assistant – PV output in kW and self-consumption %
Details
- External ID
- 1395157163
- Source
- GITHUB
- Company
- —
- Product
- xiaomi-LYWSD03MMC-to-solar-meter
- Website domain
- github.com
- Launched
- Sept. 29, 2026
- Cohort
- —
- Upvotes
- 21
- Upvotes percentile
- 0.6211247758134768
- Tags
- bluetooth, hacs, home-assistant, lywsd03mmc, photovoltaic, pvvx, solar, xiaomi
- Fetched at
- Sept. 30, 2026, 5:02 p.m.
- Updated at
- Sept. 30, 2026, 5:02 p.m.
Enrichment
- Theme
- plant care and agriculture tools
- Vertical
- Energy & climate
- Function
- Hardware & robotics
- Audience
- Prosumer
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- solar monitor firmware for xiaomi humidity sensors
- Manually corrected
- False
Could you build this?
Partial Writing Home Assistant scripts and BLE transmission logic is vibe-codeable, but writing and flashing custom low-power C firmware onto the Telink BLE microcontroller requires embedded hardware skills.
What it would actually take: Requires custom C embedded firmware targeting the Telink TLSR8251 SoC (often forking ATC or pvvx open-source firmware) to remap the segmented LCD controller to show live power figures, combined with an ESPHome/Home Assistant BLE transmitter. The hardest part is reverse-engineering the LCD segment driver matrix, managing microamp-level sleep cycles, and debugging hardware-level BLE advertising packets. Requires embedded systems and microcontroller development experience.
Competitors
Other products that read as similar to this one — 37 launches clear the similarity bar, closest 8 shown.
Attention rank: #14 of 38 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 315 days after the earliest competitor.
- PC4713 · ph · 2026-09-12 · 1 upvotes · similarity 0.45
- NoxLumin Solar Motion Sensor Wall Light · ph · 2026-09-11 · 2 upvotes · similarity 0.40
- qinghe-solar-service-platform · github · 2026-09-10 · 7 upvotes · similarity 0.40
- PowerCut.today · ph · 2026-09-18 · 1 upvotes · similarity 0.37
- BMS Monitor · ph · 2026-09-20 · 2 upvotes · similarity 0.37
- MiniWatts · github · 2026-09-10 · 120 upvotes · similarity 0.37
- SolarPowered Traffic Monitoring Solution · ph · 2026-09-26 · 2 upvotes · similarity 0.37
- solar-mini4-jev · github · 2026-09-21 · 43 upvotes · similarity 0.36
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a hardware & robotics tool for Horizontal yet.