got parameter fetch working beta only

data/input.js

@@ -52,10 +52,42 @@ function reloadTerminal() {
   .catch(error => console.log('Error:', error));
 };
 
+function updateParameters() {
+  fetch('/parameters', {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/x-www-form-urlencoded',
+    },
+    body: ''
+  })
+  .then(response => response.json())
+  .then(json_str => {
+    const active_pwm = Math.round(json_str.active_pwm / 4095 * 100);
+    document.querySelector('#range_act_pwm').value = active_pwm;
+    document.querySelector('#out_act_pwm').value = active_pwm;
+    
+    const idle_pwm_max = Math.round(json_str.idle_pwm_max / json_str.active_pwm * 100);
+    document.querySelector('#range_idl_pwm').value = idle_pwm_max;
+    document.querySelector('#out_idl_pwm').value = idle_pwm_max;
+
+    document.querySelector('#range_tim_sta').value = json_str.time_per_stair;
+    document.querySelector('#out_tim_sta').value = json_str.time_per_stair;
+
+    document.querySelector('#range_tim_ldr').value = json_str.time_ldr;
+    document.querySelector('#out_tim_ldr').value = json_str.time_ldr;
+
+    document.querySelector('#range_ldr_shw').value = json_str.ldr_schwelle;
+    document.querySelector('#out_ldr_shw').value = json_str.ldr_schwelle;
+
+  })
+  .catch(error => console.log('Error:', error));
+};
+
 document.addEventListener('DOMContentLoaded', () => {
   setInterval(reloadTerminal, 1000);
   setInterval(reloadRangeValues, 1000);
 
+  updateParameters();
 
   // use data- attributes for action
   document.querySelectorAll('.control').forEach((button) => {

lib/httpserver/httpserver.cpp

@@ -94,6 +94,14 @@ void HTTPServer::start_apps() {
       send(202, "text/plain", "");
     }
   });
+
+  this->on("/parameters", HTTP_POST, [this]() {
+    logt("got /parameters\n");
+    char json_str[255];
+    treppe->param_to_json(json_str, 255);
+    logt("%s\n", json_str);
+    send(200, "application/json", json_str);
+  });
 }
 
 template <class... Args>

lib/treppe/treppe.cpp

@@ -177,7 +177,8 @@ float Treppe::read_ldr() {
   float ldr_ohm = 40.57 * (3.3 - voltage) / voltage;
   float ldr_value = 6526.6 / (ldr_ohm * ldr_ohm);
 #ifdef LDRDEBUG
-  Serial.printf("Ohm: %f lux: %f Comp: %d\n", ldr_ohm,ldr_value, param.ldr_schwelle);
+  Serial.printf("Ohm: %f lux: %f Comp: %d\n", ldr_ohm, ldr_value,
+                param.ldr_schwelle);
 #endif
   return ldr_value;
 }
@@ -271,7 +272,6 @@ void Treppe::task() {
     if (!fsm_pend.anim_beendet) {
       fsm_pend.anim_beendet = dimmer_tick(&dimmer_ldr, DIM_LDR);
     }
-
   }
 
   if (fsm_outputs.status == ST_RUHEZUSTAND ||
@@ -388,3 +388,14 @@ void Treppe::set_ldr_schwelle(const uint16_t value,
 
   Serial.printf("Treppe: ldr_schwelle=%d\n", param_pend.ldr_schwelle);
 }
+
+void Treppe::param_to_json(char *json_str, size_t sz) {
+  snprintf(json_str, sz, "{\n\
+    \"time_ldr\": %d,\n\
+    \"time_per_stair\": %d,\n\
+    \"idle_pwm_max\": %d,\n\
+    \"active_pwm\": %d,\n\
+    \"ldr_schwelle\": %d\n}\n",
+           param.time_ldr, param.time_per_stair, param.idle_pwm_max,
+           param.active_pwm, param.ldr_schwelle);
+}

lib/treppe/treppe.h

@@ -105,6 +105,8 @@ public:
 
   // Parameter section
   void save_param_to_eeprom();
+  void param_to_json(char* json_str, size_t sz);
+
   void set_idle_pwm_max(const uint16_t value, const vorgabe_typ_t vorgabe_typ);
   void set_active_pwm(const uint16_t value, const vorgabe_typ_t vorgabe_typ);