Tests performed, first a Gen3 and then a Gen2
the shelly is Shelly2PMG3-B08184F41CDC
ADDON installed, 1 ds18b20
there is no ampere, there is nothing conected to it
Firmware ID: 20240731-123728/1.4.99-2pmg3prod0-ge3db05c
It is on a table, no heat near
Scripts Off, Access Point Off, ROOM TEMPERATURE 22.5, Eco mode ON
"temperature":{"tC":38.9, "tF":102.0}
Scripts ON, Access Point Off, ROOM TEMPERATURE 22.5, Eco mode ON
"temperature": "tC": 39.9
Scripts ON, Access Point ON, ROOM TEMPERATURE 22.8, Eco mode ON
"temperature": "tC": 52
Scripts ON, Access Point OFF, BLUETOOH ON, ROOM TEMPERATURE 22.8, Eco mode ON
"temperature": "tC": 45.7
Scripts ON, Access Point OFF, BLUETOOH ON, Bluetooth gateway ON, ROOM TEMPERATURE 23.3, Eco mode ON
"temperature": "tC": 47.6
Scripts ON, Access Point ON, BLUETOOH ON, Bluetooth gateway ON, ROOM TEMPERATURE 23.5, Eco mode OFF
"temperature": "tC": 52.8
The firmware is updated here, Firmware ID: 20250924-062807/1.7.1-gd336f31
Scripts ON, Access Point ON, BLUETOOH ON, Bluetooth gateway ??, ROOM TEMPERATURE 23.5, Eco mode ON
"temperature": "tC": 52.3
Scripts ON, Access Point ON, BLUETOOH ON, Bluetooth gateway ??, ROOM TEMPERATURE 23.6, Eco mode OFF
"temperature": "tC": 52.8
Scripts ON, Access Point OFF, BLUETOOH OFF, ROOM TEMPERATURE 23.25, Eco mode ON
"temperature": "tC": 40.4
This Shelly is the same one at the beginning of the thread. I don't know why but I turned it off and when I turned it on again it never gave the internal temperature reading of 65 degrees.
It can be seen that what increases the internal temperature a lot is having the access point active.
Updating the firmware has almost no influence on the temperature
I have done the same tests with a Shelly GEN 2 and the result of activating access point is even worse, here are the results
Type shelly: ShellyPlus2PM-10061CF9772C
ADDON installed, 1 ds18b20
there is no ampere, there is nothing conected to it
Firmware ID: 20240726-114505/1.4.0-gb2aeadb
It is on a table, no heat near
ROOM TEMPERATURE 22.5
Scripts Off, Access Point Off, ROOM TEMPERATURE 22.5, Eco mode ON
"temperature":{"tC":41.7, "tF":106.7}}
Scripts ON, Access Point Off, ROOM TEMPERATURE 22.5, Eco mode ON
"temperature": "tC": 42.1
Scripts ON, Access Point ON,ROOM TEMPERATURE 22.8, Eco mode ON
"temperature": "tC": 59.7
Scripts ON, Access Point OFF, BLUETOOH ON, ROOM TEMPERATURE 22.8, Eco mode ON
"temperature": "tC": 43.8
Scripts ON, Access Point OFF, BLUETOOH ON, Bluetooth gateway ON, ROOM TEMPERATURE 23.3, Eco mode ON
"temperature": "tC": 48.3
Scripts ON, Access Point ON, BLUETOOH ON, Bluetooth gateway ON, ROOM TEMPERATURE 23.5, Eco mode OFF
"temperature": "tC": 61.3
The firmware is updated here, Firmware ID: 20250924-062729/1.7.1-gd336f31
Scripts ON, Access Point ON, BLUETOOH ON, Bluetooth gateway ??, ROOM TEMPERATURE 23.5, Eco mode ON
"temperature": "tC": 59.9
Scripts ON, Access Point ON, BLUETOOH ON, Bluetooth gateway ??, ROOM TEMPERATURE 23.6, Eco mode OFF
"temperature": "tC": 61
Scripts ON, Access Point OFF, BLUETOOH OFF, ROOM TEMPERATURE 23.25, Eco mode ON
"temperature": "tC": 42.3
Ask me if you want any other combination in the configuration.
The conclusion is to turn off the access point.
Thank you for your patience and help