From b4774d4b77df3504f8324342a0edee5abe161e05 Mon Sep 17 00:00:00 2001
From: FCS <fcs@rabe11.de>
Date: Tue, 2 Dec 2025 19:59:39 +0100
Subject: [PATCH] communicate via json, display rssi and from, dynamic min and
 max speed via json

---
 src/main.cpp | 68 +++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 60 insertions(+), 8 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index e5b19cb..e999933 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,13 +2,14 @@
 #include <Arduino.h>
 #include <U8g2lib.h>
 #include <RadioLib.h>
-
+#include <ArduinoJson.h>
 #ifdef DEVICE_WINDE
 #include <tacho.h>
 #endif
 
 #ifdef DEVICE_SAILPLANE
 #include <airspeed.h>
+JsonDocument sailplane_data;
 #endif
 
 SX1262 radio = new Module(LORA_NSS, LORA_DIO1, LORA_NRST, LORA_BUSY);
@@ -89,6 +90,37 @@ void setup()
   u8g2.sendBuffer();
 }
 
+void draw_rssi(int Rssi){
+    u8g2.drawFrame(102,8,4,3);
+    u8g2.drawFrame(107,6,4,5);
+    u8g2.drawFrame(112,4,4,7);
+    u8g2.drawFrame(117,2,4,9);
+    u8g2.drawFrame(122,0,4,11);
+
+    if ((Rssi > -120) && Rssi < 0 )
+      {
+       u8g2.drawBox(102,8,4,3); 
+      }
+
+    if ((Rssi > -100) && Rssi < 0 )
+      {
+       u8g2.drawBox(107,6,4,5); 
+      }
+    if ((Rssi > -85) && Rssi < 0 )
+      {
+       u8g2.drawBox(112,4,4,7); 
+      }
+    if ((Rssi > -70) && Rssi < 0 )
+      {
+       u8g2.drawBox(117,2,4,9); 
+      }
+    if ((Rssi > -55) && Rssi < 0 )
+      {
+       u8g2.drawBox(122,0,4,11); 
+     }
+
+  
+}
 void loop()
 {
 #ifdef DEVICE_SAILPLANE
@@ -102,8 +134,14 @@ void loop()
   u8g2.print(vel_kmh);
   u8g2.sendBuffer();
   if (vel_kmh > 30)
-  {
-    String data = String(vel_kmh);
+  { 
+    sailplane_data["from"]= "D-1234";
+    sailplane_data["telemetry"]["speed"]=vel_kmh;
+    sailplane_data["telemetry"]["min"]=70;
+    sailplane_data["telemetry"]["max"]=150;
+    String data;
+    serializeJson(sailplane_data,data);
+    //String data = String(vel_kmh);
     int state = radio.transmit(data);
     if (state == RADIOLIB_ERR_NONE)
     {
@@ -157,6 +195,8 @@ void loop()
     // you can read received data as an Arduino String
     String str;
     int state = radio.readData(str);
+    JsonDocument received;
+    deserializeJson(received,str);
 
     // you can also read received data as byte array
     /*
@@ -166,16 +206,28 @@ void loop()
     */
 
     if (state == RADIOLIB_ERR_NONE)
-    {
+    { 
+      String data_from=received["from"];
+      int data_speed=received["telemetry"]["speed"];
+      int data_min=received["telemetry"]["min"];
+      int data_max=received["telemetry"]["max"];
       // packet was successfully received
       u8g2.clearBuffer();
-      u8g2.setFont(u8g2_font_logisoso42_tr);
-      u8g2.setCursor(0, 60);
-      u8g2.print(str);
+      u8g2.setFont(u8g2_font_ncenB10_tr);
+      u8g2.setCursor(0, 10);
+      u8g2.print(data_from);
+      u8g2.setCursor(0, 64);
+      u8g2.print(data_min);
+      u8g2.setCursor(64, 64);
+      u8g2.print(data_max);
+      u8g2.setFont(u8g2_font_logisoso32_tr);
+      u8g2.setCursor(0, 50);
+      u8g2.print(data_speed);
+      draw_rssi(radio.getRSSI());
       u8g2.sendBuffer();
       Serial.println(str);
       int speed = str.toInt();
-      set_tacho(speed, 70, 150);
+      set_tacho(data_speed, data_min, data_max);
     }
   }
 #endif