Refactored some classes into separate files in lib/

2026-09-12 17:25:55 -04:00
parent 31c7f870e0
commit 2768616be4
6 changed files with 228 additions and 230 deletions
@@ -0,0 +1,36 @@
+import time
+
+
+class SHT41:
+    DEFAULT_ADDR = 0x44
+    CMD_MEASURE_HIGH_PRECISION = 0xFD
+
+    def __init__(self, i2c, addr=DEFAULT_ADDR):
+        self.i2c = i2c
+        self.addr = addr
+        # Soft reset
+        self.i2c.writeto(self.addr, b"\x94")
+        time.sleep(0.01)
+
+    def read_values(self):
+        # Trigger high precision measurement
+        self.i2c.writeto(self.addr, bytes([self.CMD_MEASURE_HIGH_PRECISION]))
+        # Conversion takes up to 8.2ms
+        time.sleep(0.01)
+
+        # 6 bytes: [Temp_MSB, Temp_LSB, CRC, Hum_MSB, Hum_LSB, CRC]
+        data = self.i2c.readfrom(self.addr, 6)
+
+        raw_t = (data[0] << 8) | data[1]
+        raw_h = (data[3] << 8) | data[4]
+
+        # Sensirion SHT4x conversion equations
+        temp = -45.0 + 175.0 * (raw_t / 65535.0)
+        hum = -6.0 + 125.0 * (raw_h / 65535.0)
+        hum = max(0.0, min(hum, 100.0))
+
+        return {
+            "temperature": round(temp, 2),
+            "humidity": round(hum, 2),
+            "pressure": None,
+        }