scd4x.read(): indicate whether read was successful

1 files changed, 7 insertions, 5 deletions

diff --git a/src/driver/scd4x.cc b/src/driver/scd4x.cc
index 3ad34a0..365cde8 100644
--- a/src/driver/scd4x.cc
+++ b/src/driver/scd4x.cc
@@ -32,16 +32,18 @@ void SCD4x::startLowPower()
 	i2c.xmit(address, 2, txbuf, 0, rxbuf);
 }
 
-void SCD4x::read()
+bool SCD4x::read()
 {
 	txbuf[0] = 0xec;
 	txbuf[1] = 0x05;
 
-	if (i2c.xmit(address, 2, txbuf, 9, rxbuf) == 0) {
-		co2 = (rxbuf[0] << 8) + rxbuf[1];
-		rawTemperature = ((rxbuf[3] << 8) + rxbuf[4]);
-		rawHumidity = (rxbuf[6] << 8) + rxbuf[7];
+	if (i2c.xmit(address, 2, txbuf, 9, rxbuf)) {
+		return false;
 	}
+	co2 = (rxbuf[0] << 8) + rxbuf[1];
+	rawTemperature = ((rxbuf[3] << 8) + rxbuf[4]);
+	rawHumidity = (rxbuf[6] << 8) + rxbuf[7];
+	return true;
 }
 
 SCD4x scd4x;