diff --git a/include/driver/hdc1080.h b/include/driver/hdc1080.h
index f6f278c3652ef5f9e0b88920ed5619243b6f07d7..6a510a03b1a48dab30a0b49a478ffe95afc0d294 100644
--- a/include/driver/hdc1080.h
+++ b/include/driver/hdc1080.h
@@ -15,6 +15,7 @@ class HDC1080 {
 		float getRH();
 		unsigned int getManufacturerID();
 		void init();
+		void heater(bool on);
 };
 
 extern HDC1080 hdc1080;
diff --git a/src/driver/hdc1080.cc b/src/driver/hdc1080.cc
index 8da2ba757b7ae73d6298e093fbd2e1c416a9fc7a..26c97ef2a1de6b82d0eaf692d3dda4350ff59daa 100644
--- a/src/driver/hdc1080.cc
+++ b/src/driver/hdc1080.cc
@@ -39,10 +39,22 @@ unsigned int HDC1080::getManufacturerID()
 	return (unsigned int)rxbuf[0] << 8 | rxbuf[1];
 }
 
+void HDC1080::heater(bool on)
+{
+	txbuf[0] = 0x02;
+	i2c.xmit(address, 1, txbuf, 2, rxbuf);
+	if (on) {
+		txbuf[1] = rxbuf[0] | (1<<5);
+	} else {
+		txbuf[1] = rxbuf[0] & ~(1<<5);
+	}
+	i2c.xmit(address, 2, txbuf, 0, rxbuf);
+}
+
 void HDC1080::init()
 {
 	txbuf[0] = 0x02;
-	txbuf[1] = 0x08;
+	txbuf[1] = 0x00;
 	txbuf[2] = 0x00;
 	i2c.xmit(address, 3, txbuf, 0, rxbuf);
 	arch.delay_ms(15);