<![CDATA["Can´t convert NoneType to int" issue]]>Hello,

I am working on a simple program.

I receive a value between 0 and 1000 by MQTT and convert it to a digital value from 0 to 255.
Then I want to put it on the DAC channel 0.

But if I want to proceed with the digital value within the main loop I get the error "Can´t convert NoneType to int".

0_1704356408997_8076330c-0e14-4cbd-9c91-211de1ce1a02-image.png

I understand that this is a NoneType, which can´t convert into an integer, but I need to work with the digital value in the main loop, because I have to do some calculations (filtering), which is not possible in the MQTT function.

How can I solve this issue?

0_1704355631045_a5b77d31-9fea-4870-a52e-e88a63c1765a-image.png

]]>https://community.m5stack.com/topic/5940/can-t-convert-nonetype-to-int-issueRSS for NodeWed, 29 Apr 2026 23:34:27 GMTThu, 04 Jan 2024 08:20:42 GMT60<![CDATA[Reply to "Can´t convert NoneType to int" issue on Thu, 04 Jan 2024 09:59:42 GMT]]>Are you using a “convert to int” block to convert the value being sent to the dac?

]]>https://community.m5stack.com/post/23226https://community.m5stack.com/post/23226Thu, 04 Jan 2024 09:59:42 GMT<![CDATA[Reply to "Can´t convert NoneType to int" issue on Thu, 04 Jan 2024 09:18:14 GMT]]>I found a workaround meanwhile with if-else.

It is not nice, but it´s working:

  • I convert the DAC Value into a String.

  • Then I check, if it is "None", if yes I send a 0 to the DAC.

  • If DAC Value is not "None" I convert it back to integer and send it directly to the DAC.

0_1704359879454_92383df8-f87b-449d-977a-84a9a8fc9ffc-image.png

]]>https://community.m5stack.com/post/23223https://community.m5stack.com/post/23223Thu, 04 Jan 2024 09:18:14 GMT