SHT20 i2c sensor

[Sudosu132]

My code looks like this

from machine import I2C
import array
import time
import binascii

#Init bus
i2c = I2C(0, I2C.MASTER,  baudrate=100000)

#SHT20 Temperature command (use no hold master only commands --> 0xF3 )
command = array.array('B', [0xF3])
result = array.array('B',  [0, 0, 0])

print(i2c.writeto(0x40, command))
time.sleep(0.1)
result = binascii.hexlify(i2c.readfrom(0x40, 3))
print(result)

it prints values like this : b'6f40f1'
how do I get it to print temperature decimal?

[Sudosu132]

@robert-hh
Thank you so much! Works well

[robert-hh]

@Sudosu132 You could try to use my Si7021 module. It looks as if it could work. The commands and formula are pretty much the same.
https://github.com/robert-hh/SI7021
Edit: Just tried it with an SHT21. Works fine.

[robert-hh]

@Sudosu132 The first two bytes are the temp return value. You can make that a decimal number with:

T = result[0] * 256 + result[1]

In you example, that should give 28480. That value then goes into the formulat from the data sheet:

temp = -46.85 + 175.72 * (T / 65538.0)

Resulting in about 29.5 °C.

Edit: The third byte from result is the checksum.