From 18cfa16cc7b6e6a4a09422faf95e06b8d2eecca5 Mon Sep 17 00:00:00 2001
From: Graeme Cross <graeme@ceriumdesigns.com>
Date: Wed, 31 May 2017 16:59:15 +1000
Subject: [PATCH] Issue #424: Enables humidity readings in the BME280 driver by
 enforcing the write to the 'ctrl_meas' register, as per Section 5.4.3 of the
 BME280 data sheet

Signed-off-by: Graeme Cross <graeme@ceriumdesigns.com>
---
 drivers/i2c/bme280_driver.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/i2c/bme280_driver.go b/drivers/i2c/bme280_driver.go
index 8345eea3..3ac28c70 100644
--- a/drivers/i2c/bme280_driver.go
+++ b/drivers/i2c/bme280_driver.go
@@ -7,6 +7,7 @@ import (
 )
 
 const bme280RegisterControlHumidity = 0xF2
+const bme280RegisterControl = 0xf4
 const bme280RegisterHumidityMSB = 0xFD
 const bme280RegisterCalibDigH1 = 0xa1
 const bme280RegisterCalibDigH2LSB = 0xe1
@@ -113,6 +114,7 @@ func (d *BME280Driver) initHumidity() (err error) {
 	d.hc.h5 = 0 + (int16(addrE6) << 4) | (int16(addrE5) >> 4)
 
 	d.connection.WriteByteData(bme280RegisterControlHumidity, 0x3F)
+	d.connection.WriteByteData(bmp280RegisterControl, 0x3F)
 
 	return nil
 }