tempsensor.py

import adafruit_dht
from ISStreamer.Streamer import Streamer
import time
import board

# --------- User Settings ---------
SENSOR_LOCATION_NAME = "Office"
BUCKET_NAME = ":partly_sunny: Room Temperatures"
BUCKET_KEY = "dht22sensor"
ACCESS_KEY = "ENTER ACCESS KEY HERE"
MINUTES_BETWEEN_READS = 10
METRIC_UNITS = False
# ---------------------------------

dhtSensor = adafruit_dht.DHT22(board.D4)
streamer = Streamer(bucket_name=BUCKET_NAME, bucket_key=BUCKET_KEY, access_key=ACCESS_KEY)

while True:
        try:
                humidity = dhtSensor.humidity
                temp_c = dhtSensor.temperature
        except RuntimeError:
                print("RuntimeError, trying again...")
                continue
                
        if METRIC_UNITS:
                streamer.log(SENSOR_LOCATION_NAME + " Temperature(C)", temp_c)
        else:
                temp_f = format(temp_c * 9.0 / 5.0 + 32.0, ".2f")
                streamer.log(SENSOR_LOCATION_NAME + " Temperature(F)", temp_f)
        humidity = format(humidity,".2f")
        streamer.log(SENSOR_LOCATION_NAME + " Humidity(%)", humidity)
        streamer.flush()
        time.sleep(60*MINUTES_BETWEEN_READS)

Hi, when running this python script on two Raspberry Pi Zero W's I keep running into this error. Do you have any thoughts on how to resolve it?

RuntimeError, trying again...
Traceback (most recent call last):
File "tempsensor.py", line 29, in
temp_f = format(temp_c * 9.0 / 5.0 + 32.0,".2f")
TypeError: unsupported operand type(s) for *: 'NoneType' and 'float'

Thanks!

Hi Ryan, I would remove the “format” and just send it in without that function. Let me know if that works. You can format it within Initial State once the data is there. temp_f = temp_c * 9.0 / 5.0 + 32.0 Thanks, Elizabeth Adams Product Evangelist, Initial State [email protected]

…

On Oct 6, 2020, at 8:14 PM, ryangoe12 ***@***.***> wrote: @ryangoe12 commented on this gist. Hi, when running this python script on two Raspberry Pi Zero W's I keep running into this error. Do you have any thoughts on how to resolve it? RuntimeError, trying again... Traceback (most recent call last): File "tempsensor.py", line 29, in temp_f = format(temp_c * 9.0 / 5.0 + 32.0,".2f") TypeError: unsupported operand type(s) for *: 'NoneType' and 'float' Thanks! — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

Hi Elizabeth,
I'm getting the same error as Ryan above despite removing the format function. I am using a DHT11 sensor. Any suggestions for me?

Thanks,
Mike
[email protected]

Hi Mike, I made some updates to the code a few weeks ago, which fixed some errors but this one remains persistent. Are you using Python 2 or Python 3? What error message do you get? Thanks, Elizabeth Adams Product Evangelist, Initial State [email protected]

…

On Nov 15, 2020, at 10:22 AM, 136F ***@***.***> wrote: @136F commented on this gist. Hi Elizabeth, I'm getting the same error as Ryan above despite removing the format function. I am using a DHT11 sensor. Any suggestions for me? Thanks, Mike ***@***.*** ***@***.***> — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <https://gist.github.com/25be959d124f4b4c86f7160cf916f4d4#gistcomment-3528264>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKILQXDNDMVYALEX6EKJJZLSP755VANCNFSM4SGXVECQ>.

Thanks Elizabeth,
I'm running a Raspberry Pi 3 B+ connected to a breadboard containing the DHT11 and resistor. I have verified the sensor is working with a simple C script but was hoping to use IS to do some experimenting over time. When running the tempsensor.py (In my case renamed DHT11Script) I get the following error...

pi@raspberrypi:~ $ python3 DHT11Script.py
RuntimeError, trying again...
Traceback (most recent call last):
File "DHT11Script.py", line 29, in
temp_f = temp_c * 9.0 / 5.0 + 32.0
TypeError: unsupported operand type(s) for *: 'NoneType' and 'float'

I would suggest maybe trying to format temperature as a float or int, that might solve the problem. Thanks, Elizabeth Adams Product Evangelist, Initial State [email protected]

…

On Nov 18, 2020, at 10:05 AM, 136F ***@***.***> wrote: @136F commented on this gist. Thanks Elizabeth, I'm running a Raspberry Pi 3 B+ connected to a breadboard containing the DHT11 and resistor. I have verified the sensor is working with a simple C script but was hoping to use IS to do some experimenting over time. When running the tempsensor.py (In my case renamed DHT11Script) I get the following error... ***@***.***:~ $ python3 DHT11Script.py RuntimeError, trying again... Traceback (most recent call last): File "DHT11Script.py", line 29, in temp_f = temp_c * 9.0 / 5.0 + 32.0 TypeError: unsupported operand type(s) for *: 'NoneType' and 'float' — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <https://gist.github.com/25be959d124f4b4c86f7160cf916f4d4#gistcomment-3531893>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKILQXASH33XM6KZ3UMUT23SQPWC3ANCNFSM4SGXVECQ>.

@elizabethn119
change the lines when using the DHT11 instead of the DHT22

dhtSensor = adafruit_dht.DHT22(board.D4) 

to
dhtSensor = adafruit_dht.DHT11(board.D4)

Hi, Yep, that will do it! Did that fix the entire issue? Thanks, Elizabeth Adams Product Evangelist, Initial State [email protected]

…

On Nov 22, 2020, at 4:00 PM, inbinder ***@***.***> wrote: @inbinder commented on this gist. change dhtSensor = adafruit_dht.DHT22(board.D4) dhtSensor = adafruit_dht.DHT11(board.D4) — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <https://gist.github.com/25be959d124f4b4c86f7160cf916f4d4#gistcomment-3536745>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKILQXB36W2TKBNTLMC47T3SRGCZTANCNFSM4SGXVECQ>.

Thank you @inbinder and @elizabethn119. I got some help from my genius cousin who recognized I stupidly had the wrong input pin as my board design is a little different. Thank you so much for you help, I'm up and running!

Hi @elizabethn119,

Thanks for great project instructions, I really like InitialState and already got an outdoor weather bucket working using ClimaCell. However, when trying to use the code above, I have been hitting the following error:

Unable to set line 4 to input

Some internet digging suggests I may be getting a None value (unsure). I have double-checked my wiring, and they are on the correct pins. I am using a DHT22 sensor, python3, on a rpi-zero W. Any suggestions on where to start looking for fixes?

Hi, Are you using a DHT22 sensor or a different sensor? There is some test code to make sure the sensor is working you can try, but let me know the sensor first and I can direct you to that. Thanks, Elizabeth Adams Product Evangelist, Initial State [email protected]

…

On Nov 29, 2020, at 10:41 AM, erasmus95 ***@***.***> wrote: @erasmus95 commented on this gist. Hi @elizabethn119 <https://github.com/elizabethn119>, Thanks for great project instructions, I really like InitialState and already got an outdoor weather bucket working using ClimaCell. However, when trying to use the code above, I have been hitting the following error: Unable to set line 4 to input Some internet digging suggests I may be getting a None value (unsure). I have double-checked my wiring, and they are on the correct pins. I am using a DHT22 sensor, python3, on a rpi-zero W. Any suggestions on where to start looking for fixes? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <https://gist.github.com/25be959d124f4b4c86f7160cf916f4d4#gistcomment-3543924>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKILQXFGV6TES33LBJG7R6DSSJ2VJANCNFSM4SGXVECQ>.

Yup, I'm using a DHT22 sensor (Link to the one I bought off Amazon: https://smile.amazon.com/gp/product/B073F472JL/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1)

Edit: I bought a pack of two and tried swapping them out. But got the same results.

Hi, I’ve used this code before to check my DHT sensors to make sure they are connected and working. It may require a few libraries to be installed. https://learn.adafruit.com/dht/dht-circuitpython-code <https://learn.adafruit.com/dht/dht-circuitpython-code> Elizabeth Adams Product Evangelist, Initial State [email protected]

…

On Nov 29, 2020, at 12:29 PM, erasmus95 ***@***.***> wrote: @erasmus95 commented on this gist. Yup, I'm using a DHT22 sensor (Link to the one I bought off Amazon: https://smile.amazon.com/gp/product/B073F472JL/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1 <https://smile.amazon.com/gp/product/B073F472JL/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1>) — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <https://gist.github.com/25be959d124f4b4c86f7160cf916f4d4#gistcomment-3543995>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKILQXCWZVZWTFSD7FA56LDSSKHIFANCNFSM4SGXVECQ>.

Thanks! From your link and other links and searches what ended up working for me was to follow the instructions here: https://www.instructables.com/Raspberry-Pi-Tutorial-How-to-Use-the-DHT-22/ combined with your instructions on medium https://medium.com/initial-state/build-an-inexpensive-network-of-web-connected-temperature-sensors-using-pi-zeros-730a40f1fb60

Then I modified the code you provided as follows (I don't know the proper way to show this, but I'd be happy to learn):
Changed
import adafruit_dht
to
import Adafruit_DHT as dht

removed dhtSensor = adafruit_dht.DHT22(board.D4)

added DHT = 4 #change depending on which pin you are using I put it before the user settings section but anywhere before the while works

Changed
humidity = dhtSensor.humidity
temp_c = dhtSensor.temperature
to
humidity,temp_c = dht.read_retry(dht.DHT22, DHT)

Making these changes also seemed to avoid the format issue that others had. Might just be depending on the sensor output.

Thanks for the support and again for the project!

Hi, I appreciate you sharing that with me! Glad you got things working. Let me know if you have any other questions! Thanks, Elizabeth Adams Product Evangelist, Initial State [email protected]

…

On Nov 29, 2020, at 5:39 PM, erasmus95 ***@***.***> wrote: @erasmus95 commented on this gist. Thanks! From your link and other links and searches what ended up working for me was to follow the instructions here: https://www.instructables.com/Raspberry-Pi-Tutorial-How-to-Use-the-DHT-22/ <https://www.instructables.com/Raspberry-Pi-Tutorial-How-to-Use-the-DHT-22/> combined with your instructions on medium https://medium.com/initial-state/build-an-inexpensive-network-of-web-connected-temperature-sensors-using-pi-zeros-730a40f1fb60 <https://medium.com/initial-state/build-an-inexpensive-network-of-web-connected-temperature-sensors-using-pi-zeros-730a40f1fb60> Then I modified the code you provided as follows (I don't know the proper way to show this, but I'd be happy to learn): Changed import adafruit_dht to import Adafruit_DHT as dht removed dhtSensor = adafruit_dht.DHT22(board.D4) added DHT = 4 #change depending on which pin you are using I put it before the user settings section but anywhere before the while works Changed humidity = dhtSensor.humidity temp_c = dhtSensor.temperature to humidity,temp_c = dht.read_retry(dht.DHT22, DHT) Making these changes also seemed to avoid the format issue that others had. Might just be depending on the sensor output. Thanks for the support and again for the project! — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <https://gist.github.com/25be959d124f4b4c86f7160cf916f4d4#gistcomment-3544148>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKILQXA6JEDQXODY7KEAUXLSSLLSRANCNFSM4SGXVECQ>.

Thanks! From your link and other links and searches what ended up working for me was to follow the instructions here: https://www.instructables.com/Raspberry-Pi-Tutorial-How-to-Use-the-DHT-22/ combined with your instructions on medium https://medium.com/initial-state/build-an-inexpensive-network-of-web-connected-temperature-sensors-using-pi-zeros-730a40f1fb60

Then I modified the code you provided as follows (I don't know the proper way to show this, but I'd be happy to learn):
Changed
import adafruit_dht
to
import Adafruit_DHT as dht

removed dhtSensor = adafruit_dht.DHT22(board.D4)

added DHT = 4 #change depending on which pin you are using I put it before the user settings section but anywhere before the while works

Changed
humidity = dhtSensor.humidity
temp_c = dhtSensor.temperature
to
humidity,temp_c = dht.read_retry(dht.DHT22, DHT)

Making these changes also seemed to avoid the format issue that others had. Might just be depending on the sensor output.

Thanks for the support and again for the project!

This worked for me. Thanks for the solution

Hello! I have two Pis with DHT22 sensors on them that I set up using your post here. Both are working great....sometimes. While I have them set to run the script at startup in cron, I have found that it doesn't always start and when I go to run it manually, I get this message that others have reported above:

RuntimeError, trying again...
Traceback (most recent call last):
File "tempsensor.py", line 28, in
temp_f = format(temp_c * 9.0 / 5.0 + 32.0, ".2f")
TypeError: unsupported operand type(s) for *: 'NoneType' and 'float'

I have nearly zero experience with Python, or any coding really for that matter, so I'm not 100% sure how to troubleshoot this but I have tried some of the adjustments mentioned above without luck.

The odd thing that I really don't understand is that sometimes it'll run and sometimes it won't. Normally I wait a few minutes to try again and then it magically works. This does not compute.

I really love this project by the way. It's exactly what I was looking for.
Thanks!

Hi, You can try removing the format and just use: Temp_f = temp_c *9.0 / 5.0 + 32 That seems to have fixed the issue for some issues. Thanks, Elizabeth Adams Product Evangelist, Initial State [email protected]

…

On Dec 24, 2020, at 3:07 PM, christh0mas ***@***.***> wrote: @christh0mas commented on this gist. Hello! I have two Pis with DHT22 sensors on them that I set up using your post here <https://medium.com/initial-state/build-an-inexpensive-network-of-web-connected-temperature-sensors-using-pi-zeros-730a40f1fb60>. Both are working great....sometimes. While I have them set to run the script at startup in cron, I have found that it doesn't always start and when I go to run it manually, I get this message that others have reported above: RuntimeError, trying again... Traceback (most recent call last): File "tempsensor.py", line 28, in temp_f = format(temp_c * 9.0 / 5.0 + 32.0, ".2f") TypeError: unsupported operand type(s) for *: 'NoneType' and 'float' I have nearly zero experience with Python, or any coding really for that matter, so I'm not 100% sure how to troubleshoot this but I have tried some of the adjustments mentioned above without luck. The odd thing that I really don't understand is that sometimes it'll run and sometimes it won't. Normally I wait a few minutes to try again and then it magically works. This does not compute. I really love this project by the way. It's exactly what I was looking for. Thanks! — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <https://gist.github.com/25be959d124f4b4c86f7160cf916f4d4#gistcomment-3572408>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKILQXE337QRRF2BCMGW7YDSWOUQHANCNFSM4SGXVECQ>.

Still getting pretty much the same thing for some reason:

pi@enviro1:/etc $ python3 tempsensor.py
RuntimeError, trying again...
Traceback (most recent call last):
File "tempsensor.py", line 28, in
temp_f = temp_c * 9.0 / 5.0 + 32
TypeError: unsupported operand type(s) for *: 'NoneType' and 'float'

Again, if I try to run it a couple more times, it does eventually work. Just not sure why it runs successfully sometimes and not others.

Thanks.

Hi Chris, This is an issue that has come up before and I honestly haven’t been able to figure it out yet. I am not sure why it doesn’t accept the format and then when format is removed, it doesn’t accept just a value. Or why it works sometime and then errors out. I will continue to try and figure this one out. Thanks, Elizabeth Adams Product Evangelist, Initial State [email protected]

…

On Dec 30, 2020, at 7:19 PM, christh0mas ***@***.***> wrote: @christh0mas commented on this gist. Still getting pretty much the same thing for some reason: ***@***.***:/etc $ python3 tempsensor.py RuntimeError, trying again... Traceback (most recent call last): File "tempsensor.py", line 28, in temp_f = temp_c * 9.0 / 5.0 + 32 TypeError: unsupported operand type(s) for *: 'NoneType' and 'float' Again, if I try to run it a couple more times, it does eventually work. Just not sure why it runs successfully sometimes and not others. Thanks. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <https://gist.github.com/25be959d124f4b4c86f7160cf916f4d4#gistcomment-3578003>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKILQXCYIFGUKM7TG57IC3LSXPGT3ANCNFSM4SGXVECQ>.

Hi Elizabeth,

Not sure if this has been resolved, but I have been having the same issue. I replaced 29 with temp_f = "{:.2f}".format(temp_c * 9.0 / 5.0 +32.0). I noticed that when I ran the python code, after I made the changes to line 29, it would come back initially with the error that others pointed out. I ran it a few more times and then refreshed my dashboard on initial state and then ran the code again and it started to work. I would have to repeat this every time I stopped it and wanted to start it back up again. Not sure why it is doing it but as long as I can SSH into the pi and willing to run the code a few times it seems to work fine now.

Hi,

Great project but I am slightly stuck. My first issue is pip3 install pureio, for some reason I am getting a 404 error, so I am not sure if this is causing my issue, I don't think that it is but I could be wrong. My second issue is this I am using BME280 but not adafruit one, I have followed both options but still cannot get it to work. I am sure that this is caused by my sensor not being adafruit but this one or the crawlspace one still give me an error.