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Support for Tapo P316M energy monitoring power strip #1558
Description
Could you please add support for Tapo P316M?
I purchased one hardware revision v1.6 running latest firmware 1.0.5 Build 250306 Rel.151943 and it is not being discovered.
- Tapo app has Third-party compatibility enabled.
- Other tapo smartplugs P115 work just fine, not this newer one and it seems that TP/Tapo may have changed the protocol.
Activity
TheLinuxGuy commented on Jul 21, 2025
Adding some hopefully helpful debug info
The username and password I used is correct, and the above test on a P115 work fine without complaint about "check password" so I speculate this device may use a different kind of API methods?
TheLinuxGuy commented on Jul 23, 2025
Actually @rytilahti helped me out in another bug and I have been able to get further with this new device (it was provisioned via tss so I had to disconnect all my tp-link devices, reset to factory then re-associate manually). Now I am getting further with the device BUT I get no power insights.
Here is an error when using kasa usage on P316M
TheLinuxGuy commented on Jul 23, 2025
Followed the instructions and created a PR to add this but its failing some tests, I think because of some unexpected power features this device adds that isn't supported yet?
#1561
github-actions commented on Oct 22, 2025
There hasn't been any activity on this issue recently. This issue has been automatically marked as stale because of that. It will be closed if no further activity occurs.
Please make sure to update to the latest python-kasa version and check if that solves the issue.
Thank you for your contributions.
HairNutz commented on Jul 7, 2026
SUCCESS - P316M(US) Working with python-kasa 0.10.2
Environment
Ubuntu 24.04 LXC
python-kasa 0.10.2
Tapo P316M(US)
Firmware: 1.4.1 Build 260420 Rel.012620
Important
The device DID NOT work initially.
Before enabling "Third-Party Device" support in the Tapo app, I received:
== Unsupported device ==
Device Type: SMART.TAPOPLUG
Device Model: P316M(US)
Encrypt Type: TPAP
Login version: 2
Unable to create device
The device was discoverable but could not be queried.
What Fixed It
Open Tapo app
Enable:
Third-Party Device Support
After enabling Third-Party Device Support the device switched to using KLAP authentication instead of appearing as unsupported.
Reset TP-Link account password.
Use the TP-Link account EMAIL address and password with python-kasa.
Before resetting my password I consistently received:
AuthenticationError:
Device response did not match our challenge on ip x.x.x.x
The password stored in my Tapo app appeared valid for app login but would not authenticate from python-kasa.
After resetting the TP-Link account password and using the newly reset password, authentication succeeded.
Working Command
kasa
--host 192.168.1.xxx
--type smart
--username your_email@example.com \ #Case Sensitive
--password 'YourPassword'
state
Useful Command
kasa
--host 192.168.1.xxx
--type smart
--username your_email@example.com
--password 'YourPassword'
feature
This displays per-outlet:
No Home Assistant required.
Example Python Collection Script
p316m_collect.py
import subprocess
import re
from datetime import datetime
result = subprocess.run(
[
"kasa",
"--host", "192.168.1.x",
"--type", "smart",
"--username", "Your_Email@example.com",
"--password", "YourPassword",
"feature"
],
capture_output=True,
text=True
)
current_child = None
for line in result.stdout.splitlines():
m = re.search(r"== Child (.+) ==", line) if m: current_child = m.group(1) continue m = re.search(r"Current consumption .*: ([0-9.]+) W", line) if m and current_child: print( f"{datetime.now().isoformat()} " f"{current_child} " f"{m.group(1)}" )Example output:
2026-07-07T17:10:27 Modem 8.3
2026-07-07T17:10:27 UDMP 18.6
2026-07-07T17:10:27 ProMax 16 35.6
2026-07-07T17:10:27 LabPVE01 52.5