Thermostat: Which output is the control signal?

[Geni]

https://tasmota.github.io/docs/Thermostat/
Which GPIO is defined as output?

Despite searching for days, I haven't found an answer.

[Philip Knowles]

The one you tell it to be in Configuration>Module. Any GPIO can be configured as an output (Relay) or input (Button, Switch or sensor)

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From: sonof...@googlegroups.com <sonof...@googlegroups.com> on behalf of Geni <eugen.a...@gmail.com>
Sent: 28 August 2025 15:00
To: TasmotaUsers <sonof...@googlegroups.com>
Subject: Thermostat: Which output is the control signal?

 

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[Geni]

I want to control a semiconductor with the PI output of the thermostat.
When I assign a relay to a GPIO, I get a switch button that has no connection to the thermostat.

[Philip Knowles]

A screenshot of the configuration page and the type of device that Tasmota is installed on would help. If you read the compile instructions it says Relay 1 is the default output.

#define THERMOSTAT_RELAY_NUMBER 1 // Default output relay number for the first controller (+i for following ones)

#define THERMOSTAT_SWITCH_NUMBER 1 // Default input switch number for the first controller (+i for following ones)

The GPIO that you define as Relay1 should become the ouput

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From: sonof...@googlegroups.com <sonof...@googlegroups.com> on behalf of Geni <eugen.a...@gmail.com>

Sent: Thursday, August 28, 2025 17:00
To: TasmotaUsers <sonof...@googlegroups.com>
Subject: Re: Thermostat: Which output is the control signal?

To view this discussion, visit https://groups.google.com/d/msgid/sonoffusers/6f4fa55d-074c-4270-b377-46328ac56a3an%40googlegroups.com.