Quick Start¶
SensorBridge Example¶
Following example code shows how to use this driver with a Sensirion SHT3x
connected to the computer using a Sensirion SEK-SensorBridge. The driver
for the SensorBridge can be installed with
pip install sensirion-shdlc-sensorbridge
.
import time
from sensirion_shdlc_driver import ShdlcSerialPort, ShdlcConnection
from sensirion_shdlc_sensorbridge import SensorBridgePort, \
SensorBridgeShdlcDevice, SensorBridgeI2cProxy
from sensirion_i2c_driver import I2cConnection
from sensirion_i2c_sht.sht3x import Sht3xI2cDevice
# Connect to the SensorBridge with default settings:
# - baudrate: 460800
# - slave address: 0
with ShdlcSerialPort(port='COM1', baudrate=460800) as port:
bridge = SensorBridgeShdlcDevice(ShdlcConnection(port), slave_address=0)
print("SensorBridge SN: {}".format(bridge.get_serial_number()))
# Configure SensorBridge port 1 for SHT3x
bridge.set_i2c_frequency(SensorBridgePort.ONE, frequency=100e3)
bridge.set_supply_voltage(SensorBridgePort.ONE, voltage=3.3)
bridge.switch_supply_on(SensorBridgePort.ONE)
# Create SHT3x device
i2c_transceiver = SensorBridgeI2cProxy(bridge, port=SensorBridgePort.ONE)
sht3x = Sht3xI2cDevice(I2cConnection(i2c_transceiver))
# Measure
while True:
temperature, humidity = sht3x.single_shot_measurement()
# use default formatting for printing output:
print("{}, {}".format(temperature, humidity))
# custom printing of attributes:
print("{:0.2f} °C ({} ticks), {:0.2f} %RH ({} ticks)".format(
temperature.degrees_celsius, temperature.ticks,
humidity.percent_rh, humidity.ticks))
time.sleep(1.0)