It seems like temper.py is not able to handle temperatures below zero degree Celsius.
I get following error:
File "./temper.py", line 235, in _read_serial
info['internal temperature'] = float(m.group(1))
ValueError: could not convert string to float:

Debugging serial interface show that negative temperatures are sendt to temper.py.

Hello,

I get the following error:

Bus 003 Dev 002 0c45:7401 TEMPerF1.2MPerF1 Error: Unknown firmware TEMPerF1.2MPerF1: b'80021a2065724631'

Changing "if info['firmware'][:10] == 'TEMPerF1.4':" to "...1.2" makes it work:

Bus 003 Dev 002 0c45:7401 TEMPerF1.2 26.25C 79.25F - - - -

I believe the current firmware check is unnecessarily too strict.

Regexp parsing outer sensor is not properly handling external sensor.
Here is output which should be parsed:

Temp-Outer:27.11 [C],36.72 [%RH]<Temp-Inner:28.15 [C],34.80 [%RH]<

Working regexp (should be review)

>>> m = re.search(r'Temp-Outer:([0-9]{1,2}.[0-9]{1,2}).{4},([0-9][0-9].[0-9][0-9]).*' , 'Temp-Outer:26.89 [C],36.23 [%RH]<Temp-Inner:28.17 [C],34.87 [%RH]<')
>>> m.group(1)
'26.89'
>>> m.group(2)
'36.23'
 and add line to show it, like
info['external temperature'] = float(k.group(1))
info['external humidity'] = float(k.group(2))

Working example:
Temp-Outer:27.11 [C],36.35 [%RH]<Temp-Inner:28.16 [C],34.64 [%RH]<
[
    {
        "vendorid": 6790,
        "productid": 21795,
        "manufacturer": "",
        "product": "",
        "busnum": 1,
        "devnum": 14,
        "devices": [
            "ttyUSB0"
        ],
        "firmware": "TEMPerX232_V2.1",
        "internal temperature": 28.16,
        "internal humidity": 34.64,
        "external temperature": 27.11,
        "external humidity": 36.35
    }
]

OR:
Temp-Outer:27.11 [C],37.33 [%RH]<Temp-Inner:28.18 [C],34.93 [%RH]<

Bus 001 Dev 014 1a86:5523 TEMPerX232_V2.1 28.18C 82.72F 34% 27.11C 80.80F 37%

While a device's "devnum" field changes each insertion/boot, making it hard for a program to identify a given device/sensor from the JSON output, a device's USB port-identifier reflects where it's plugged-in.

I've got this PR that adds a JSON field "port" to reliably associate a device with a USB socket. Would it be worthwhile to switch this PR to this repo?

When I call 'temper' more than once, I often get this error:
serial.serialutil.SerialException: [Errno 16] could not open port /dev/ttyUSB0: [Errno 16] Device or resource busy: '/dev/ttyUSB0'

Calling it several times, I will eventually get a correct response. Increasing s.timeout and s.writeTimeout seems to have helped it somewhat.

Hi,

I used the temper.py code to quickly get readings from my Temper2 on MacOS using libusb. Since this library seems to be the most modern and sensor-supporting one around, I was wondering if you'd accept a patch to use libusb if requested via command line argument? That would enable this code to be used on Windows + Mac as well, and wouldn't affect the existing operation.

I was surprised that I couldn't find any code to read the sensor on a Mac, and it'd be great to help remedy that.

The latest shipment has an updated firmware:

(venv) [13:47] server102.place10:~/temper# python temper.py -l
Bus 001 Dev 001 1d6b:0002   xHCI Host Controller ['hidraw0', 'hidraw1']
Bus 001 Dev 002 046d:0825    
Bus 001 Dev 003 1b3f:2247   GENERAL WEBCAM 
Bus 001 Dev 004 1a86:e025    ['hidraw0', 'hidraw1']
Bus 002 Dev 001 1d6b:0003   xHCI Host Controller 
(venv) [13:47] server102.place10:~/temper# python temper.py --force 1a86:e025
Bus 001 Dev 004 1a86:e025 TEMPerHUM_V3.8 Error: Unknown firmware TEMPerHUM_V3.8: b'8020065a0c360000'

This looks exactly the same as the previous white temperhum devices

I have not yet looked in depth, but it seems that this repo's temper.py succeeds in identifying my device but not in reading its temperature. I wonder if this version has changed the command interface somewhat. Here is what I see:

$ python3 temper.py --verbose
Firmware value: b'54454d506572476f6c645f56332e3120'
Data value: b''
Bus 002 Dev 034 413d:2107 TEMPerGold_V3.1 - - - - - -
$ python3 temper.py --json
[
{
"vendorid": 16701,
"productid": 8455,
"manufacturer": "",
"product": "",
"busnum": 2,
"devnum": 34,
"devices": [
"hidraw1",
"hidraw2"
],
"firmware": "TEMPerGold_V3.1",
"hex_firmware": "54454d506572476f6c645f56332e3120",
"hex_data": ""
}
]
$

I will try to debug more closely when I have a chance, but I'm posting here just in case someone else has already figured out how to use this version of the dongle with temper.py.

Made both of these changes and updated the timeout from 0.2 to 0.5 and still get failures every other read when running
while true; do sudo ./temper2.py; sleep 5; done
on an RPi 3 B+

Just investigating, the regularity of it made me call hardware into question, checking dmesg it shows brownout on each successful read, subsequently returning rubbish. Will confirm with new PSU.

__ Update:
PSU swapped for a high current one, no improvement - power drop out doesn't happen but still get errors.

Output modified as I don't need all the bumf, but....
--@--:/home/pi# ./temper2.py
21.5 2020-01-21 21:01:39
--@--:/home/pi# ./temper2.py
21.5 2020-01-21 21:01:41
--@--:/home/pi# ./temper2.py
Traceback (most recent call last):
File "./temper2.py", line 434, in
sys.exit(temper.main())
File "./temper2.py", line 427, in main
results = self.read(args.verbose)
File "./temper2.py", line 345, in read
results.append({ **info, **usbread.read() })
File "./temper2.py", line 272, in read
return self._read_hidraw(self.device)
File "./temper2.py", line 180, in _read_hidraw
firmware = self._read_hidraw_firmware(fd, self.verbose)
File "./temper2.py", line 159, in _read_hidraw_firmware
raise RuntimeError('Cannot read device firmware identifier')
RuntimeError: Cannot read device firmware identifier

Originally posted by @bucklevision in #16 (comment)

Hi,

To make this device work, I modified:

if info['firmware'][:12] in [ 'TEMPerX_V3.1', 'TEMPerX_V3.3', 'TEMPer2_V3.9' ]:

to include the V3.9 version, and:

if vendorid == 0x1a86 and productid == 0xe025:
return True

to recognise the corresponding USB id (1a86:e025).

This trick works for temperature, but not for humidity:

Bus 001 Dev 031 1a86:e025 TEMPer2_V3.9 28.93C 84.07F - - - -

is it possible to add full compatibility for this device? can I help in any way?

Thanks in advance

root@raspberrypi:/home/pi/temper/# ./temper.py
Bus 001 Dev 005 413d:2107 TEMPerX_V3.2 Error: Unknown firmware TEMPerX.V3.2: b'80800a534e200000800109dd4e200000'
root@raspberrypi:/home/pi/temper# ./temper.py -l
Bus 001 Dev 006 413d:2107 * ['hidraw3', 'hidraw4']

Bought this "TEMPer2" off Amazon a few months back and finally got around to attempting setup. Been a bit of a headache as most software solutions don't seem to support this model. Any thoughts on resolving this issue?

I have installed and used the Pypi package 'temper_py' in the Jetson J3010 device, to read the sensor (PCSensor: TEMPER1F V4.1) values.
This sensor is connected through USB HUB. When running the program, it raised a firmware compatibility issue, Please instruct us to avoid this.
Here I attached screenshots for your reference.

Is it possible to change the script for python 2.7? I would like to run it on OpenWRT and its pyserial package is only for python 2.7. I tried to run temper.py on python 2.7 (with pyserial) and it gave the error:

File "/tmp/temper.py", line 322
results.append({ **info, **usbread.read() })

Thanks

I noticed that these devices have had something changed, I found someone linking to this project saying that it worked for them. This is the error im getting now... Any suggestions on getting this to work? Thanks

jon@jon-ThinkPad-T540p:~/temper$ sudo ./temper.py --json
[
{
"vendorid": 16701,
"productid": 8455,
"manufacturer": "",
"product": "",
"busnum": 3,
"devnum": 4,
"devices": [
"hidraw0",
"hidraw1"
],
"error": "Unknown firmware TEMPerGold_V3.1: b'808009214e200000'"
}
]

This project appears to have been abandoned.

The PyPi package and continued development continues on ccwienk/temper.

We'll take issues and PRs over there

Hi
I tried temper.py but I get this error:

Bus 001 Dev 022 1a86:e025 TEMPer2_V3.7 Error: Unknown firmware TEMPer2_V3.7: b'808009b74e2000008001090e4e200000'

Any idea what I can try?