JM3-BHT31 RP6 or ASURO Barometer, Hygrometer & Temp. Module RP6 or ASURO Barometer, Hygrometer & Temp. Module ©2014 AREXX Engineering and JM3 Engineering www.arexx.com For latest updates check www.jm3-engineering.com! AREXX Engineering & JM3 Engineering Version: 1.05 Nov.
Impressum ©2012-14 AREXX Engineering Nervistraat 16 8013 RS Zwolle The Netherlands Tel.: +31 (0) 38 454 2028 Fax.: +31 (0) 38 452 4482 This manual is protected by the laws of Copyright. It is forbidden to copy all or part of the contents without prior written authorization! Product specifications and delivery contents are subject to changes. The manual is subject to changes without prior notice. You can find free updates of this manual on http://www.arexx.
Safety recommendations IMPORTANT: Prior to using this robot arm for the first time, please read this manual thoroughly up to the end! They explain the correct use and inform you about potential dangers! Moreover they contain important information that might not be obvious for all users. - Check the polarity of the batteries or power supply. - Keep all products dry, when the product gets wet remove the power directly. - Remove the batteries or power when you are not using the product for a longer period.
ASURO Robot Asuro xTend and Compass- / Gyro Module and Display AREXX Engineering & JM3 Engineering Version: 1.05 Nov.
Introduction A general purpose barometer, hygrometer and temperature sensor module. It can be directly plugged into the ASURO expansion port on the ASURO xTend board - it can be stacked up with the ASURO Compass / Gyro Module and or RTC. The sensor module is using the MS5607-02BA high resolution altimeter and the HTU21D sensor from MEAS Switzerland with I2C bus interface.
Manual 1. Connecting to RP6 or ASURO xTend Board The module will be simply plugged in to the K3 connector on the ASURO xTend board. There is a voltage regulator on the module so it can be directly plugged into the I2C Module header on the RP6 Sensor board. In the RP6 case, you have to solder contacts on the boards (Precision Contacts RM 2,54 Conrad Part number 741333 – 05). 1.1. PIN OUT Barometer Humidity Temp Module (Asuro Connector) PIN 1 PIN 2 PIN 3 PIN 4 PIN 5 = = = = = VDD_3.
2. Software The data access works over I2C Bus. There is no special initialization required – refer to datasheet of the MS5607-02BA and HTU21D for more information. A demo software is available for the ASURO xTend board with the attached Barometer Module. 2.1.
3. Commands / Register 3.1. MS5607-02BA03 Read Command Reset Convert D1 (OSR=256) Convert D1 (OSR=512) Convert D1 (OSR=1024) Convert D1 (OSR=2048) Convert D1 (OSR=4096) Convert D2 (OSR=256) Convert D2 (OSR=512) Convert D2 (OSR=1024) Convert D2 (OSR=2048) Convert D2 (OSR=4096) ADC Read PROM Read Hex Code 0x1E 0x40 0x42 0x44 0x46 0x48 0x50 0x52 0x54 0x56 0x58 0x00 0xA0 to 0xAE Since there are no register on the barometer chip you have to follow the given procedure to read data after power up: 1.
3.2. HTU21D Read Commands Trigger Temperature Measurement Trigger Humidity Measurement Trigger Temperature Measurement Trigger Humidity Measurement Write user register Read user register Soft Reset Hex Code 0xE3 0xE5 0xF3 0xF5 0xE6 0xE7 0xFE Comment Hold master Hold master No Hold master No Hold master User Register Measurement Resolution Bit 7 Bit 0 RH Temp 0 0 12 bits 14 bits 0 1 8 bits 12 bits 1 0 10 bits 13 bits 1 1 11 bits 11 bits Status End of Battery ‘0’: VDD>2.25V ‘1’: VDD<2.
5. Schematic 6. PCB Top view: AREXX Engineering & JM3 Engineering Version: 1.05 Nov.
