Requires U3 hardware version 1.21. Reads temperature and humidity from a Sensirion SHT1X sensor (which is used by the EI-1050). For more information, see the EI-1050 datasheet, and the SHT1X datasheet from sensirion.com.
Table 5.2.10-1. SHT1X Command Response
| Command: |
|
| Byte |
|
| 0 |
Checksum8 |
| 1 |
0xF8 |
| 2 |
0×02 |
| 3 |
0×39 |
| 4 |
Checksum16 (LSB) |
| 5 |
Checksum16 (MSB) |
| 6 |
DataPinNum (0-19) |
| 7 |
ClockPinNum (0-19) |
| 8 |
Reserved |
| 9 |
Options |
| |
|
| Response: |
|
| Byte |
|
| 0 |
Checksum8 |
| 1 |
0xF8 |
| 2 |
0×05 |
| 3 |
0×39 |
| 4 |
Checksum16 (LSB) |
| 5 |
Checksum16 (MSB) |
| 6 |
Errorcode |
| 7 |
0×00 |
| 8 |
StatusReg |
| 9 |
StatusRegCRC |
| 10-11 |
Temperature |
| 12 |
TemperatureCRC |
| 13-14 |
Humidity |
| 15 |
HumidityCRC |
- Data/Clock -PinNum: Assigns which digital I/O line is used for each SPI line. Value passed is 0-7 corresponding to FIO0-FIO7. State and direction are controlled automatically for the specified lines.
- StatusReg: Returns a read of the SHT1X status register.
- Temperature: Returns the raw binary temperature reading.
- Humidity: Returns the raw binary humidity reading.
- #CRC: Returns the CRC values from the sensor.
- Options:
- Bit 7: Read Humidity
- Bit 6: Read Temperature
- Bit 5-3: Reserved, write 0
- Bit 2: Enable Heater
- Bit 1: Reserved, write 0
- Bit 0: Resolution. 1 = 8-bit RH and 12-bit Temp, 0 = 12-bit RH and 14-bit Temp
