From abd32a0b901030074523e00a3e158ad13216addb Mon Sep 17 00:00:00 2001
From: adrian-vlad <adrian-vlad@github.com>
Date: Thu, 24 Sep 2020 00:07:24 +0300
Subject: [PATCH] Added bme280 sensor module
---
pi_mqtt_gpio/modules/bme280.py | 48 ++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
create mode 100644 pi_mqtt_gpio/modules/bme280.py
diff --git a/pi_mqtt_gpio/modules/bme280.py b/pi_mqtt_gpio/modules/bme280.py
new file mode 100644
index 0000000..f9fb234
--- /dev/null
+++ b/pi_mqtt_gpio/modules/bme280.py
@@ -0,0 +1,48 @@
+from pi_mqtt_gpio.modules import GenericSensor
+
+
+REQUIREMENTS = ("smbus", "RPi.bme280")
+CONFIG_SCHEMA = {
+ "i2c_bus_num": dict(type="integer", required=True, empty=False),
+ "chip_addr": dict(type="integer", required=True, empty=False),
+}
+SENSOR_SCHEMA = {
+ "type": dict(
+ type="string",
+ required=False,
+ empty=False,
+ default="temperature",
+ allowed=["temperature", "humidity", "pressure"],
+ )
+}
+
+
+class Sensor(GenericSensor):
+ """
+ Implementation of Sensor class for the BME280 sensor.
+ """
+
+ def __init__(self, config):
+ import smbus
+ import bme280
+
+ self.bus = smbus.SMBus(config["i2c_bus_num"])
+ self.address = config["chip_addr"]
+ self.calib = bme280.load_calibration_params(self.bus, self.address)
+
+ def setup_sensor(self, config):
+ return True # nothing to do here
+
+ def get_value(self, config):
+ """get the temperature, humidity or pressure value from the sensor"""
+ import bme280
+
+ data = bme280.sample(self.bus, self.address, self.calib)
+
+ if config["type"] == "temperature":
+ return data.temperature
+ if config["type"] == "humidity":
+ return data.humidity
+ if config["type"] == "pressure":
+ return data.pressure
+ return None
--
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