1 files changed, 13 insertions, 0 deletions
diff --git a/src/home/temphum/si7021.py b/src/home/temphum/si7021.py
new file mode 100644
index 0000000..6289e15
--- /dev/null
+++ b/src/home/temphum/si7021.py
@@ -0,0 +1,13 @@
+from .base import I2CTempHumSensor
+
+
+class Si7021(I2CTempHumSensor):
+    i2c_addr = 0x40
+
+    def temperature(self) -> float:
+        raw = self.bus.read_i2c_block_data(self.i2c_addr, 0xE3, 2)
+        return 175.72 * (raw[0] << 8 | raw[1]) / 65536.0 - 46.85
+
+    def humidity(self) -> float:
+        raw = self.bus.read_i2c_block_data(self.i2c_addr, 0xE5, 2)
+        return 125.0 * (raw[0] << 8 | raw[1]) / 65536.0 - 6.0