Hexiwear / Hexi_Humid_Temp_Example

Simple temperature and humidity program example for Hexiwear featuring UART

Fork of HTU21D by Alex Lipford

This project demonstrates the use of the HTU21D temperature and humidity sensor embedded in Hexiwear

Open a Hyperterminal tool on your computer and connect it to the "mbed Serial port (COMxx)" with Baud rate "9600bps"

Compile the project and copy the binary "Hexi_Humid_Temp_Example_HEXIWEAR.bin" in the DAP-LINK drive from your computer file explorer Press the K64F-RESET button on the docking station to start the program on your board

Every 500ms the value of the Temperature and Humidity will be displayed in the Hyperterminal window and the LED will blink Green

Files at this revision

API Documentation at this revision

Revision 1:d7568a103ef5, committed 2014-10-19

Comitter:
alipford3
Date:
Sun Oct 19 18:24:53 2014 +0000
Parent:
0:db86ad1b4459
Child:
2:4fd07be6bad8
Commit message:
An updated basic library to interface with the HTU21D digital temperature and humidity sensor.

Changed in this revision

HTU21D/HTU21D.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/HTU21D/HTU21D.cpp	Fri Mar 28 14:55:03 2014 +0000
+++ b/HTU21D/HTU21D.cpp	Sun Oct 19 18:24:53 2014 +0000
@@ -45,11 +45,11 @@
 
     tx[0] = TRIGGER_TEMP_MEASURE; // Triggers a temperature measure by feeding correct opcode.
     i2c_->write((HTU21D_I2C_ADDRESS << 1) & 0xFE, tx, 1);
-    wait_ms(1);
+    wait_ms(50);
     
     // Reads triggered measure
     i2c_->read((HTU21D_I2C_ADDRESS << 1) | 0x01, rx, 2);
-    wait_ms(1);
+    wait_ms(50);
     
     // Algorithm from datasheet to compute temperature.
     unsigned int rawTemperature = ((unsigned int) rx[0] << 8) | (unsigned int) rx[1];