Dht Sensor. I think the developer made a code mistake

soorte · July 6, 2019, 1:57am

The developer must delete the following code from the file: grovepi.py

plz remove ‘print(number)’ code

Ignore ‘nan’ data

cyclicalobsessive · July 6, 2019, 3:37pm

Are you using the latest version?

Suggest update your software and retry your test.

The ‘nan’ return appears intentional. Perhaps use numpy.isnan(x), math.isnan(x), or pandas.isna(x) to check a data value.

RobertLucian · July 8, 2019, 6:13pm

I’m not seeing this in the latest version of the library. This is from the last commit:

github.com

DexterInd/GrovePi/blob/a29c92146a801b15dc254f1d328141de49598290/Software/Python/grovepi.py#L321-L347


def dht(pin, module_type):
	write_i2c_block(dht_temp_cmd + [pin, module_type, unused])
	number = read_identified_i2c_block(dht_temp_cmd, no_bytes = 8)


	if p_version==2:
		h=''
		for element in (number[0:4]):
			h+=chr(element)


		t_val=struct.unpack('f', h)
		t = round(t_val[0], 2)


		h = ''
		for element in (number[4:8]):
			h+=chr(element)


		hum_val=struct.unpack('f',h)
		hum = round(hum_val[0], 2)
	else:
		t_val=bytearray(number[0:4])

This file has been truncated. show original

Can you check this out?