The iCog Temperature and Humidity sensor uses the ST Microelectronics HTS221 capacitive digital sensor to measure temperature and humidity. Users should consult the ST HT221 datasheet for more information about the sensor.

CognIoT™ iCog™ sensor boards come fitted with an ‘ID-IoT’ system chip. This is an EEPROM with 1kbytes of user storage (for calibration data etc.). The ID-IoT chip contains a unique 32-bit number to identify the sensor board. The Sensor –HTS221

• 16-bit data
• 0 – 100% relative humidity
• ±4.5% accurate over 20% to 80% RH
• High relative humidity sensitivity – 0.004% rH/LSB
• Temp Accuracy: ± 0.5°C over 15 to 40°c
• Temp range -40°C to 120°C
• 16-bit ADC and output data
• Output data rate from 1Hz to 12.5Hz.

ID-IoT chip – eeprom

• Prewired for base I2C address
• Configurable for different addresses
• o A0,A1 address selection may be changed
• o Allows up to 4 icogs on same bus
• o See application note for details
• 1KB user data space
• 32-bit Unique ID No. (UID)
• Option to fit pull up resistors on SDA/SCL lines if required

All iCogs are supplied with a 0.1" pin header for self assembly.