wsen-pads: Add pressure sensor driver.

lib/wsen-pads/README.md

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+# WSEN-PADS MicroPython Driver
+
+MicroPython driver for the **Würth Elektronik WSEN-PADS** absolute pressure sensor.
+
+This driver provides an easy-to-use API to read **pressure** and **temperature** using the I²C interface.
+
+The WSEN-PADS is a high-resolution digital pressure sensor with integrated temperature measurement, designed for applications such as weather monitoring, altimetry, and environmental sensing.
+
+---
+
+# Features
+
+* I²C communication
+* Pressure measurement
+* Temperature measurement
+* One-shot acquisition
+* Continuous measurement mode
+* Configurable Output Data Rate (ODR)
+* Low-noise mode support
+* Optional low-pass filter
+* Soft reset and device reboot
+* Raw data access
+
+---
+
+# Sensor Overview
+
+| Feature                 | Value                  |
+| ----------------------- | ---------------------- |
+| Pressure range          | 26 kPa – 126 kPa       |
+| Pressure resolution     | 24-bit                 |
+| Temperature resolution  | 16-bit                 |
+| Pressure sensitivity    | 1 / 4096 hPa per digit |
+| Temperature sensitivity | 0.01 °C per digit      |
+| Interface               | I²C / SPI              |
+| Maximum ODR             | 200 Hz                 |
+
+---
+
+# Hardware Connection
+
+The driver currently supports **I²C mode**.
+
+## Pins
+
+| Sensor Pin | Description          |
+| ---------- | -------------------- |
+| VDD        | Power supply         |
+| VDD_IO     | Interface supply     |
+| GND        | Ground               |
+| SDA        | I²C data             |
+| SCL        | I²C clock            |
+| CS         | Must be HIGH for I²C |
+| SAO        | Selects I²C address  |
+
+## I²C Address
+
+| SAO  | Address |
+| ---- | ------- |
+| LOW  | `0x5C`  |
+| HIGH | `0x5D`  |
+
+Recommended configuration for a single device on the bus:
+
+```
+SAO = HIGH
+I2C address = 0x5D
+```
+
+---
+
+# Installation
+
+Clone the repository and copy the driver to your MicroPython device.
+
+Example using **mpremote**:
+
+```bash
+mpremote mount lib/wsen-pads
+```
+
+The driver will then be available as:
+
+```python
+from wsen_pads import WSEN_PADS
+```
+
+---
+
+# Basic Usage
+
+```python
+from machine import I2C, Pin
+from time import sleep
+from wsen_pads import WSEN_PADS
+
+i2c = I2C(
+    1,
+    scl=Pin(7),
+    sda=Pin(6),
+)
+
+sensor = WSEN_PADS(i2c)
+
+while True:
+    pressure, temperature = sensor.read()
+
+    print("Pressure:", pressure, "hPa")
+    print("Temperature:", temperature, "°C")
+    print()
+
+    sleep(1)
+```
+
+---
+
+# One-shot Measurement
+
+```python
+pressure, temperature = sensor.read_one_shot()
+```
+
+This triggers a single conversion and returns the measurement.
+
+---
+
+# Continuous Mode
+
+```python
+from wsen_pads.const import ODR_10_HZ
+
+sensor.set_continuous(odr=ODR_10_HZ)
+
+pressure = sensor.pressure()
+temperature = sensor.temperature()
+```
+
+Available ODR values:
+
+```
+ODR_1_HZ
+ODR_10_HZ
+ODR_25_HZ
+ODR_50_HZ
+ODR_75_HZ
+ODR_100_HZ
+ODR_200_HZ
+```
+
+---
+
+# Raw Data Access
+
+Raw values from the sensor can also be read:
+
+```python
+raw_pressure = sensor.pressure_raw()
+raw_temperature = sensor.temperature_raw()
+```
+
+Conversions:
+
+```
+pressure_hpa = raw_pressure / 4096
+temperature_c = raw_temperature * 0.01
+```
+
+---
+
+# Status Helpers
+
+The driver provides helper functions for checking data availability.
+
+```python
+sensor.pressure_available()
+sensor.temperature_available()
+sensor.is_ready()
+```
+
+---
+
+# Device Control
+
+## Soft Reset
+
+```python
+sensor.soft_reset()
+```
+
+## Reboot Sensor
+
+```python
+sensor.reboot()
+```
+
+---
+
+# Examples
+
+Examples are available in the `examples` directory.
+
+---
+
+# Driver Structure
+
+```
+wsen-pads/
+│
+├── README.md
+├── manifest.py
+├── examples/
+│
+└── wsen_pads/
+    ├── __init__.py
+    ├── const.py
+    ├── device.py
+    └── exceptions.py
+```
+
+---

lib/wsen-pads/examples/altitude.py

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+from machine import I2C, Pin
+from time import sleep
+from wsen_pads import WSEN_PADS
+
+SEA_LEVEL_PRESSURE = 1013.25 # depends on your location, you can adjust it for better altitude estimation
+EXPONENT = 0.1903 # standard atmosphere exponent for altitude calculation
+
+i2c = I2C(1)
+
+sensor = WSEN_PADS(i2c)
+
+def pressure_to_altitude(p):
+    return 44330 * (1 - (p / SEA_LEVEL_PRESSURE) ** EXPONENT)
+
+for _ in range(10):
+    pressure, temp = sensor.read()
+
+    altitude = pressure_to_altitude(pressure)
+
+    print("Pressure:", pressure, "hPa")
+    print("Altitude:", altitude, "m")
+    print()
+
+    sleep(0.5)

lib/wsen-pads/examples/basic_reader.py

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+from machine import I2C, Pin
+from time import sleep
+from wsen_pads import WSEN_PADS
+
+
+# Update the I2C bus number and pins to match your board
+i2c = I2C(1)
+
+# Create the sensor object
+pads = WSEN_PADS(i2c)
+
+print("WSEN-PADS found")
+print("Device ID:", hex(pads.device_id()))
+
+for _ in range(10):
+    pressure_hpa, temperature_c = pads.read()
+
+    print("P:", pressure_hpa, "hPa  T:", temperature_c, "°C")
+
+    sleep(0.5)

lib/wsen-pads/examples/continuous_reader.py

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+from machine import I2C, Pin
+from time import sleep
+from wsen_pads import WSEN_PADS
+from wsen_pads.const import ODR_10_HZ
+
+i2c = I2C(1)
+
+sensor = WSEN_PADS(i2c)
+
+sensor.set_continuous(odr=ODR_10_HZ)
+
+for _ in range(10):
+    pressure = sensor.pressure()
+    temperature = sensor.temperature()
+
+    print("P:", pressure, "hPa  T:", temperature, "°C")
+
+    sleep(0.5)

lib/wsen-pads/examples/one_shot_reader.py

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+from machine import I2C, Pin
+from time import sleep
+from wsen_pads import WSEN_PADS
+
+i2c = I2C(1)
+
+sensor = WSEN_PADS(i2c)
+
+for _ in range(10):
+    pressure, temperature = sensor.read_one_shot()
+
+    print("P:", pressure, "hPa  T:", temperature, "°C")
+
+    sleep(0.5)