added qr code for radiosonde

firmware/application/apps/ui_sonde.cpp

@@ -41,6 +41,7 @@ void SondeLogger::on_packet(const sonde::Packet& packet) {
 
 namespace ui {
 
+
 SondeView::SondeView(NavigationView& nav) {
 	baseband::run_image(portapack::spi_flash::image_tag_sonde);
 
@@ -63,6 +64,7 @@ SondeView::SondeView(NavigationView& nav) {
 		&text_temp,
 		&text_humid,
 		&geopos,
+                &button_see_qr,
 		&button_see_map
 	});
 
@@ -108,6 +110,12 @@ SondeView::SondeView(NavigationView& nav) {
 		static_cast<int8_t>(receiver_model.vga()),
 	});
 
+
+        // QR code with geo URI
+	button_see_qr.on_select = [this, &nav](Button&) {
+		nav.push<QRCodeView>(geo_uri);
+	};
+
 	button_see_map.on_select = [this, &nav](Button&) {
 		nav.push<GeoMapView>(
 			sonde_id,
@@ -154,10 +162,56 @@ void SondeView::focus() {
 	field_vga.focus();
 }
 
+
+// used to convert float to character pointer, since unfortunately function like
+// sprintf and c_str aren't supported.
+char * SondeView::float_to_char(float x, char *p) 
+{
+
+    	char *s = p + 9; // go to end of buffer
+    	uint16_t decimals;  // variable to store the decimals
+    	int units;  // variable to store the units (part to left of decimal place)
+    	if (x < 0) { // take care of negative numbers
+        	decimals = (int)(x * -100000) % 100000; // make 1000 for 3 decimals etc.
+        	units = (int)(-1 * x);
+    	} else { // positive numbers
+        	decimals = (int)(x * 100000) % 100000;
+        	units = (int)x;
+    	}
+
+	// TODO: more elegant solution (loop?)
+    	*--s = (decimals % 10) + '0';
+    	decimals /= 10; 
+    	*--s = (decimals % 10) + '0';
+    	decimals /= 10; 
+    	*--s = (decimals % 10) + '0';
+    	decimals /= 10; 
+    	*--s = (decimals % 10) + '0';
+    	decimals /= 10; 
+    	*--s = (decimals % 10) + '0';
+    	*--s = '.';
+
+    	while (units > 0) {
+        	*--s = (units % 10) + '0';
+        	units /= 10;
+    	}
+    	if (x < 0) *--s = '-'; // unary minus sign for negative numbers
+    	return s;
+}
+
 void SondeView::on_packet(const sonde::Packet &packet)
 {
 	if (!use_crc || packet.crc_ok()) //euquiq: Reject bad packet if crc is on
 	{
+
+		char buffer_lat[10] = {};
+		char buffer_lon[10] = {};
+
+		strcpy(geo_uri, "geo:");
+		strcat(geo_uri, float_to_char(gps_info.lat, buffer_lat));
+        	strcat(geo_uri, ",");
+		strcat(geo_uri, float_to_char(gps_info.lon, buffer_lon));
+
 		text_signature.set(packet.type_string());
 
 		sonde_id = packet.serial_number(); //used also as tag on the geomap

firmware/application/apps/ui_sonde.hpp

@@ -26,6 +26,7 @@
 #include "ui_navigation.hpp"
 #include "ui_receiver.hpp"
 #include "ui_rssi.hpp"
+#include "ui_qrcode.hpp"
 #include "ui_geomap.hpp"
 
 #include "event_m0.hpp"
@@ -63,6 +64,8 @@ public:
 
 	std::string title() const override { return "Radiosonde RX"; };
 
+	
+
 private:
 	std::unique_ptr<SondeLogger> logger { };
 	uint32_t target_frequency_ { 402700000 };
@@ -70,6 +73,8 @@ private:
 	bool use_crc { false };
 	bool beep { false };
 
+	char geo_uri[32]  = {};
+
 	sonde::GPS_data gps_info { };
 	sonde::temp_humid temp_humid_info { };
 	std::string sonde_id { };
@@ -173,9 +178,15 @@ private:
 		{ 0, 12 * 16 },
 		GeoPos::alt_unit::METERS
 	};
-	
+
+
+	Button button_see_qr {
+		{ 2 * 8, 15 * 16, 12 * 8, 3 * 16 },
+		"See QR" 
+	};		
+
 	Button button_see_map {
-		{ 8 * 8, 16 * 16, 14 * 8, 3 * 16 },
+		{ 16 * 8, 15 * 16, 12 * 8, 3 * 16 },
 		"See on map"
 	};
 
@@ -190,7 +201,7 @@ private:
 
 	void on_packet(const sonde::Packet& packet);
 	void on_headphone_volume_changed(int32_t v);
-	
+	char * float_to_char(float x, char *p);
 	void set_target_frequency(const uint32_t new_value);
 
 	uint32_t tuning_frequency() const;