Yl105 Datasheet Better • Easy & Full

| Parameter | Value | Why it matters | | :--- | :--- | :--- | | Operating Voltage | 3.3V to 5.5V | Better compatibility (works with 3.3V ESP32 & 5V Arduino) | | Humidity Range | 20% to 90% RH | Standard room conditions | | Humidity Accuracy | ±5% RH | Comparable to DHT11 | | Temperature Range | 0°C to 50°C | Indoor/Greenhouse focused | | Temperature Accuracy | ±2°C | Adequate for HVAC monitoring | | Sampling Rate | 1 Hz (1 reading per second) | Better stability than cheap clones | | Signal Type | Single-bus digital | Uses only 1 GPIO pin |

The "Better" Factor: The datasheet explicitly notes that the YL105 includes a 10kΩ pull-up resistor. The raw DHT11 does not. This means the YL105 is better for beginners because you don't need external components to make it work. yl105 datasheet better

Below is a compiled, engineering-grade summary derived from component datasheets: | Parameter | Value | Why it matters

| Parameter | Value / Range | Source / Note | |-----------|---------------|----------------| | Supply Voltage | 3.3V – 5V DC (±5%) | PCB regulator (none) – direct to LM393 | | Quiescent Current | ~5mA (no IR LED) + 15mA IR LED | Calculated | | Output Type | Digital (DO): Active low (0V when obstacle detected) | Open-collector via LM393 | | Output Sink Current | Max 20mA (DO) | From LM393 datasheet | | Analog Output (AO) | 0V to VCC (inverse relationship with reflection) | Phototransistor voltage divider | | IR Wavelength | 940nm typical | Standard IR LED | | Detection Range | 2cm – 30cm (depends on object color/reflectivity) | Empirical, not guaranteed | | Response Time | < 10µs (digital output) | LM393 response + optical | | Operating Temp | 0°C – 70°C | Limited by LM393 commercial grade | Below is a compiled, engineering-grade summary derived from

After scouring GitHub, Hackaday, and Chinese forums, the answer is no. There is no official v2.0 datasheet. The YL-105 is a victim of its own success — so cheap that manufacturers don't bother with documentation.

However, you can build a better datasheet yourself. By following the calibration, hardware mods, and code above, you have essentially created a custom technical reference that outperforms any factory document.

Final Recommendation: Use the YL-105 for non-critical projects (plant watering alerts, greenhouse monitoring). For medical, scientific, or industrial applications, switch to a sensor with a genuine datasheet (e.g., Sensirion SHT85 or VH400). But if you are stuck with a box of YL-105s, the "better" datasheet is the one you just read.