Difference between revisions of "Module/TronSens HTM B71"

Latest revision as of 12:12, 17 January 2021

TronSens HTM 71

IST HYT-271

Overview

The TronSens HTM B71 (now sold as IST HYT-271) is a relative humidity and digital temperature sensor. Early versions seemed to have issues with other devices on the same I2C bus.

Module name	meteo/humid_htm_b71
Sensor type	humidity, temperature
Range (humidity)	0 .. 100 %RH
Range (temperature)	-40°C .. +125°C
Resolution (humidity)	? %RH
Resolution (temperature)	0.01°C
Refresh rate	4Hz
I2C address	0x28

Product data sheet

Application note

Hardware

The sensor board can be directly interfaced to the autopilots I2C 3.3V interface

Wiring

Autopilot I2C pin	Autopilot I2C	HTM B71	HTM B71 pin
1	GND	GND	2
2
3	+3.3V	Vdd	3
4	SDA	SDA	1
5	SCL	SCL	4

Usage

To use the humidity sensor add:

File: conf/airframes/myplane.xml

  <modules>
    <load name="humid_htm_b71.xml"/>
  </modules>

Result message

The raw data (ihumid/itemp) and the converted result (humid/temp) is written to the log file. The message is automatically sent when new data is received, it does not have to be added to the telemetry file.

File: conf/messages.xml

  <message name="HTM_STATUS" id="115">
    <field name="ihumid" type="uint16"/>
    <field name="itemp" type="uint16"/>
    <field name="humid" type="float" unit="rel_hum" format="%.2f"/>
    <field name="temp" type="float" unit="deg_celsius" format="%.2f"/>
  </message>

Sample log file lines

15.891 123 HTM_STATUS 4807 5920 29.35 19.2
16.143 123 HTM_STATUS 4807 5917 29.34 19.17
16.391 123 HTM_STATUS 4807 5917 29.34 19.17
15.643 123 HTM_STATUS 4809 5917 29.35 19.2

@@ Line 1: / Line 1: @@
 __NOTOC__
 [[Image:Htm_b71.jpg|thumb|right|TronSens HTM 71]]
+[[Image:Ist_hyt_271.jpg|thumb|right|IST HYT-271]]
 ==Overview==
-The TronSens HTM B71 (now sold as IST HYT-271?) is a relative humidity and digital temperature sensor. Early versions seemed to have issues with other devices on the same I2C bus.
+The TronSens HTM B71 (now sold as IST HYT-271) is a relative humidity and digital temperature sensor. Early versions seemed to have issues with other devices on the same I2C bus.
 {|border="1"
@@ Line 31: / Line 33: @@
 |}
-[http://www.hy-line.de/HTM/ Product home page]
+[https://www.ist-ag.com/sites/default/files/DHHYT271_E.pdf Product data sheet]
-[http://www.hy-line.de/fileadmin/hy-line/sensorik/hersteller/datasheets/ts_htm-b71_fse.pdf Product data sheet]
+[https://www.ist-ag.com/sites/default/files/AHHYTM_E.pdf Application note]
 ==Hardware==