Gandalf/OctoPrint-Enclosure
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configurable sensor address for mcp9808

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This commit is contained in:
munzli
2019-09-29 19:00:31 +02:00
parent de5aa9463f
commit 01e727cb94
2 changed files with 15 additions and 9 deletions
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6
octoprint_enclosure/__init__.py
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@@ -513,7 +513,7 @@ class EnclosurePlugin(octoprint.plugin.StartupPlugin, octoprint.plugin.TemplateP
temp = self.read_max31855_temp(sensor['temp_sensor_address'])
hum = 0
elif sensor['temp_sensor_type'] == "mcp9808":
temp = self.read_mcp_temp()
temp = self.read_mcp_temp(sensor['temp_sensor_address'])
hum = 0
else:
self._logger.info("temp_sensor_type no match")
@@ -559,10 +559,10 @@ class EnclosurePlugin(octoprint.plugin.StartupPlugin, octoprint.plugin.TemplateP
return return_value, return_value
def read_mcp_temp(self):
def read_mcp_temp(self, address):
try:
script = os.path.dirname(os.path.realpath(__file__)) + "/mcp9808.py"
args = ["python", script]
args = ["python", script, str(address)]
if self._settings.get(["debug_temperature_log"]) is True:
self._logger.debug("Temperature MCP9808 cmd: %s", " ".join(args))
proc = Popen(args, stdout=PIPE)

18
octoprint_enclosure/mcp9808.py
View File

@@ -1,3 +1,4 @@
import sys
import smbus
# default I2C address for device.
@@ -27,24 +28,29 @@ MCP9808_REG_CONFIG_ALERTMODE = 0x0001
def main():
# get bus address if provided or use default address
address = MCP9808_I2CADDR_DEFAULT
if len(sys.argv) == 2:
address = int(sys.argv[1], 16)
# get I2C bus
bus = smbus.SMBus(1)
# MCP9808 address, 0x18(24)
# MCP9808 address, default 0x18(24)
# configuration register, 0x01(1)
# continuous conversion mode, power-up default
config = [MCP9808_REG_CONFIG_CONTCONV, 0x00]
bus.write_i2c_block_data(MCP9808_I2CADDR_DEFAULT, MCP9808_REG_CONFIG, config)
bus.write_i2c_block_data(address, MCP9808_REG_CONFIG, config)
# MCP9808 address, 0x18(24)
# MCP9808 address, default 0x18(24)
# select resolution rgister, 0x08(8)
# resolution = +0.0625 / C, 0x03(03)
bus.write_byte_data(MCP9808_I2CADDR_DEFAULT, MCP9808_REG_RESOLUTION, 0x03)
bus.write_byte_data(address, MCP9808_REG_RESOLUTION, 0x03)
# MCP9808 address, 0x18(24)
# MCP9808 address, default 0x18(24)
# read data back from 0x05(5), 2 bytes
# temp MSB, TEMP LSB
data = bus.read_i2c_block_data(MCP9808_I2CADDR_DEFAULT, MCP9808_REG_AMBIENT_TEMP, 2)
data = bus.read_i2c_block_data(address, MCP9808_REG_AMBIENT_TEMP, 2)
# convert the data to 13-bits
ctemp = ((data[0] & 0x1F) * 256) + data[1]