121GW-Multimeter-Firmware-RE
EEVblog 121GW multimeter firmware (v2.05) reverse-engineered into plain C. Builds with GCC and CMake, matches the original in emulation, and is tested on the meter.
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GITHUB · launched Nov 3, 2026 · 43 upvotes (top 67%) · 0 views
Niche: embedded systems and firmware utilities · 239 launches, 6 in the last 7 days ▼ -65% · Explore this niche →
Category and tags
- Horizontal
- Hardware & robotics
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 239 launches in embedded systems and firmware utilities →
Could you build this?
No The project reverse-engineers the firmware of a specific embedded multimeter, which needs embedded systems, disassembly, and hardware debugging expertise and access to the physical device.
What it would actually take: Reproducing this requires disassembling the firmware binary with tools such as Ghidra, identifying the MCU and peripherals, writing a hardware-accurate emulator to validate behavior, and testing on the real meter with probes. Vibe coding can help write C from decompiled output, but the verification against hardware needs embedded RE skills and the physical device.
Competitors
Other products that read as similar to this one : 71 launches clear the similarity bar, closest 8 shown.
Attention rank: #45 of 72 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 302 days after the earliest competitor.
- 121GW-Open-Firmware · github · 2026-11-01 · 39 upvotes · similarity 0.75
- kws-x1-standalone-rs · github · 2026-10-10 · 22 upvotes · similarity 0.42
- esp32-cpu-ram-gauges · github · 2026-10-07 · 10 upvotes · similarity 0.42
- ESP32_C5_Wifi_spectrum_analyzer · github · 2026-10-06 · 18 upvotes · similarity 0.40
- Titan Audit: Current Logger 0.5S class · ph · 2026-10-18 · 1 upvotes · similarity 0.39
- PC4713 · ph · 2026-09-12 · 1 upvotes · similarity 0.38
- Multimeter · ph · 2026-10-29 · 1 upvotes · similarity 0.37
- Open-Source 8-Ch BCI Board (ESP32 and ADS1299 and OpenBCI GUI) · hn · 2026-01-05 · 54 upvotes · similarity 0.37
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