8 hours ago
- ESP32-C3 SuperMini modules have a compact SMD antenna that limits WiFi range, but adding a 31mm silver-plated wire as a quarter-wavelength antenna significantly improves performance.
- The modification involves soldering a wire with a 16mm horizontal loop and 15mm vertical section directly to the SMD antenna terminals, bypassing the original antenna.
- Testing showed consistent signal strength improvements of 6 dB on average, and over 10 dB at range edges, leading to more stable connections and extended WiFi range.
- The original SMD antenna is inefficient due to poor PCB placement near components, causing RF energy reflection and reduced range.