---
title: "Advance the simulation one control step with optional control input overrides."
method: POST
path: "/advance/{testid}"
tags: ["Test Execution"]
---

# Advance the simulation one control step with optional control input overrides.

`POST /advance/{testid}`

Advance simulation one control step with optional control input(s) and receive measurements.
If specified, control input value(s) will be constant over the control step.
Use <input_name_u> to specify value and corresponding <input_name_activate> to enable value
overwrite for the input.

## Request body

- object

## Response `200`

Successful response with simulation advancement results.

- SimResponse
  - `message` string — A message describing the response.
  - `payload` object — Current values of all input and measurement signals; always includes "time".
    - `time` number, required — Current simulation time (seconds since Jan 1st, 00:00:00).
  - `status` integer — HTTP status code.

## Changes

- **2026-02-02** `352c81bcd71d` — 2 info
  - api tag `Test Execution` added
  - api tag `Test Simulation and Data` removed
- **2026-01-02** `e37b5217d73f` — 2 info
  - api tag `Test Simulation and Data` added
  - api tag `control` removed
- **2025-12-27** `9bb743194905` — 2 info
  - api tag `control` added
  - api tag `Test Execution` removed
- **2025-12-18** `e979b6db7bfd` — 1 breaking, 1 info
  - request body became required
  - added the required property `payload/time` to the response with the `200` status
- **2025-11-18** `6f370686638c` — 1 info
  - api tag `control` added

[Full history](https://skmtc.dev/ibpsa/apis/boptest-service-api/changes/advance/:testid/post.md)

---

[API](https://skmtc.dev/ibpsa/apis/boptest-service-api.md) · [All operations](https://skmtc.dev/ibpsa/apis/boptest-service-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/ibpsa/boptest-service-api/revisions/ecdfc7b011f7/schema)