diff --git a/src/main.rs b/src/main.rs
index 98a4676..7ef20b6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -26,11 +26,13 @@ async fn main(#[shuttle_shared_db::Postgres] pool: PgPool) -> shuttle_axum::Shut
         .route("/configuration", get(retrieve_config))
         .route("/configuration", post(update_config))
         // brewing events
-        //.route("/brewing-events", get(todo!()))
+        .route("/brewing-events", get(retrieve_brewing_events))
         // types of tea
         .route("/types-of-tea", get(retrieve_types_of_tea))
         .route("/types-of-tea/:id", post(update_tea_by_id))
         .route("/types-of-tea/:id", get(retrieve_tea_by_id))
+        // update steeping time and trigger log entry
+        .route("/tea-steeping-time/:id", post(update_tea_steeping_time_by_id))
         // teavail-device
         .route("/add-tea", post(add_tea))
         .route("/update-tea", post(update_tea_by_rfid)) // probably already covered by "update_tea_by_id"
diff --git a/src/requests/get_requests.rs b/src/requests/get_requests.rs
index d7e025b..10f3e8a 100644
--- a/src/requests/get_requests.rs
+++ b/src/requests/get_requests.rs
@@ -45,6 +45,19 @@ pub async fn retrieve_tea_by_id(
     }
 }
 
+// TODO: implement this correctly
+pub async fn retrieve_brewing_events(
+    State(state): State<MyState>,
+) -> Result<impl IntoResponse, impl IntoResponse> {
+    match sqlx::query_as::<_, Tea>("SELECT * FROM steepinglog GROUPBY tea_id")
+        .fetch_optional(&state.pool)
+        .await
+    {
+        Ok(tea) => Ok((StatusCode::OK, Json(tea))),
+        Err(e) => Err((StatusCode::BAD_REQUEST, e.to_string())),
+    }
+}
+
 // used by teavail-device
 pub async fn retrieve_tea_by_rfid(
     Path(rfid): Path<String>,
@@ -67,7 +80,10 @@ pub async fn delete_tea_by_id(
     State(state): State<MyState>,
 ) -> Result<impl IntoResponse, impl IntoResponse> {
     match sqlx::query_as::<_, Tea>(
-        "DELETE FROM tea WHERE id = $1 RETURNING id, teaname, rfidcode, watertemp, steepingseconds",
+        "
+        DELETE FROM tea WHERE id = $1
+        RETURNING id, teaname, rfidcode, watertemp, steepingseconds
+        ",
     )
     .bind(id)
     .fetch_one(&state.pool)
diff --git a/src/requests/post_requests.rs b/src/requests/post_requests.rs
index ebf160e..580af77 100644
--- a/src/requests/post_requests.rs
+++ b/src/requests/post_requests.rs
@@ -1,52 +1,115 @@
-use crate::data::{MyState, Tea, TeaNew, Config};
-use axum::{extract::{State, Path}, http::StatusCode, response::IntoResponse, Json};
+use crate::data::{Config, MyState, Tea, TeaNew};
+use axum::{
+    extract::{Path, State},
+    http::StatusCode,
+    response::IntoResponse,
+    Json,
+};
 
 pub async fn update_config(
     State(state): State<MyState>,
     Json(config): Json<Config>,
 ) -> Result<impl IntoResponse, impl IntoResponse> {
-    match sqlx::query_as::<_, Tea>("UPDATE config SET default_steeping_time = $1, feedback_timeout = $2 RETURNING default_steeping_time, feedback_timeout")
-        .bind(&config.default_steeping_time)
-        .bind(&config.feedback_timeout)
-        .fetch_one(&state.pool)
-        .await
+    match sqlx::query_as::<_, Tea>(
+        "
+        UPDATE config
+        SET default_steeping_time = $1, feedback_timeout = $2 
+        RETURNING default_steeping_time, feedback_timeout
+        ",
+    )
+    .bind(config.default_steeping_time)
+    .bind(config.feedback_timeout)
+    .fetch_one(&state.pool)
+    .await
     {
         Ok(config) => Ok((StatusCode::OK, Json(config))),
         Err(e) => Err((StatusCode::BAD_REQUEST, e.to_string())),
     }
 }
 
-// used by web-interface
+// TODO: should be used by web-interface to update metadata
 pub async fn update_tea_by_id(
     State(state): State<MyState>,
     Path(id): Path<i32>,
     Json(data): Json<TeaNew>,
 ) -> Result<impl IntoResponse, impl IntoResponse> {
-    match sqlx::query_as::<_, Tea>("UPDATE tea SET tea_name = $1, water_temp = $2, steeping_seconds = $3 WHERE id = $4 RETURNING id, tea_name, rfid_code, water_temp, steeping_seconds")
-        .bind(&data.tea_name)
-        .bind(&data.water_temp)
-        .bind(&data.steeping_seconds)
-        .bind(id)
-        .fetch_one(&state.pool)
-        .await
+    match sqlx::query_as::<_, Tea>(
+        "
+        UPDATE tea 
+        SET tea_name = $1, water_temp = $2, steeping_seconds = $3 
+        WHERE id = $4 
+        RETURNING id, tea_name, rfid_code, water_temp, steeping_seconds
+        ",
+    )
+    .bind(&data.tea_name)
+    .bind(data.water_temp)
+    .bind(data.steeping_seconds)
+    .bind(id)
+    .fetch_one(&state.pool)
+    .await
     {
         Ok(tea) => Ok((StatusCode::OK, Json(tea))),
         Err(e) => Err((StatusCode::BAD_REQUEST, e.to_string())),
     }
 }
 
+// used to update steeping time (triggers log entry)
+pub async fn update_tea_steeping_time_by_id(
+    State(state): State<MyState>,
+    Path(id): Path<i32>,
+    Json(tea_new): Json<TeaNew>,
+) -> Result<impl IntoResponse, impl IntoResponse> {
+    match sqlx::query_as::<_, Tea>(
+        "
+        UPDATE tea SET steeping_seconds = $1
+        WHERE id = $2
+        RETURNING id, tea_name, rfid_code, water_temp, steeping_seconds
+        ",
+    )
+    .bind(tea_new.steeping_seconds)
+    .bind(id)
+    .fetch_one(&state.pool)
+    .await
+    {
+        Ok(tea) => {
+            // add steeping time change to steeping log
+            match sqlx::query(
+                "
+                INSERT INTO steepinglog (tea_id, steeping_seconds)
+                VALUES ($1, $2)
+                ",
+            )
+            .bind(id)
+            .bind(tea_new.steeping_seconds)
+            .execute(&state.pool)
+            .await
+            {
+                Ok(_) => Ok((StatusCode::OK, Json(tea))),
+                Err(e) => Err((StatusCode::BAD_REQUEST, e.to_string())),
+            }
+        }
+        Err(e) => Err((StatusCode::BAD_REQUEST, e.to_string())),
+    }
+}
+
 // used by teavail-device
 pub async fn update_tea_by_rfid(
     State(state): State<MyState>,
     Json(data): Json<TeaNew>,
 ) -> Result<impl IntoResponse, impl IntoResponse> {
-    match sqlx::query_as::<_, Tea>("UPDATE tea SET tea_name = $1, water_temp = $2, steeping_seconds = $3 WHERE rfid_code = $4 RETURNING id, tea_name, rfid_code, water_temp, steeping_seconds")
-        .bind(&data.tea_name)
-        .bind(&data.water_temp)
-        .bind(&data.steeping_seconds)
-        .bind(&data.rfid_code)
-        .fetch_one(&state.pool)
-        .await
+    match sqlx::query_as::<_, Tea>(
+        "
+        UPDATE tea SET tea_name = $1, water_temp = $2, steeping_seconds = $3
+        WHERE rfid_code = $4
+        RETURNING id, tea_name, rfid_code, water_temp, steeping_seconds
+        ",
+    )
+    .bind(&data.tea_name)
+    .bind(data.water_temp)
+    .bind(data.steeping_seconds)
+    .bind(&data.rfid_code)
+    .fetch_one(&state.pool)
+    .await
     {
         Ok(tea) => Ok((StatusCode::OK, Json(tea))),
         Err(e) => Err((StatusCode::BAD_REQUEST, e.to_string())),
@@ -58,16 +121,19 @@ pub async fn add_tea(
     Json(tea_new): Json<TeaNew>,
 ) -> Result<impl IntoResponse, impl IntoResponse> {
     println!("add");
-    match sqlx::query_as::<_, Tea>
-    (
-        "INSERT INTO tea (tea_name, rfid_code, water_temp, steeping_seconds) VALUES ($1, $2, $3, $4) RETURNING id, tea_name, rfid_code, water_temp, steeping_seconds"
+    match sqlx::query_as::<_, Tea>(
+        "
+        INSERT INTO tea (tea_name, rfid_code, water_temp, steeping_seconds)
+        VALUES ($1, $2, $3, $4)
+        RETURNING id, tea_name, rfid_code, water_temp, steeping_seconds
+        ",
     )
-        .bind(&tea_new.tea_name)
-        .bind(&tea_new.rfid_code)
-        .bind(&tea_new.water_temp)
-        .bind(&tea_new.steeping_seconds)
-        .fetch_one(&state.pool)
-        .await
+    .bind(&tea_new.tea_name)
+    .bind(&tea_new.rfid_code)
+    .bind(tea_new.water_temp)
+    .bind(tea_new.steeping_seconds)
+    .fetch_one(&state.pool)
+    .await
     {
         Ok(tea) => Ok((StatusCode::CREATED, Json(tea))),
         Err(e) => Err((StatusCode::BAD_REQUEST, e.to_string())),