Stream json into parser. Print city on display.

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "cmake.ignoreCMakeListsMissing": true
+}

platformio.ini

@@ -13,7 +13,8 @@ platform = https://github.com/maxgerhardt/platform-raspberrypi.git
 board = rpipicow
 framework = arduino
 monitor_speed = 115200
-build_flags =
-    -I include
-    -DPIO_FRAMEWORK_ARDUINO_ENABLE_FREERTOS
+build_flags = 
+	-I include
+	-DPIO_FRAMEWORK_ARDUINO_ENABLE_FREERTOS
 build_src_filter = +<main.cpp>
+lib_deps = bblanchon/ArduinoJson@7.4.3

src/F1_api.h

@@ -3,26 +3,115 @@
 #include "FreeRTOS.h"
 #include "task.h"
 #include "secrets.h"
+#include "ArduinoJson.h"
+
+struct race_info {
+    char session_name[50];
+    char date_start[32];
+    char circuit_short_name[50];
+    uint16_t session_key;
+    uint16_t meeting_key;
+    uint16_t circuit_key;
+};
+
+extern race_info next_race;
+
+static int get_race_query_url(char* target, size_t target_size) {
+    if (target == NULL) return -1;
+
+    time_t now = time(nullptr);
+    struct tm timeinfo, futureTime;
+    
+    localtime_r(&now, &timeinfo);
+    
+    futureTime = timeinfo;
+    futureTime.tm_mon += 2;
+    mktime(&futureTime);
+
+    char date_buffer[12];
+    char fdate_buffer[12];
+    Serial.print("");
+    strftime(date_buffer, sizeof(date_buffer), "%Y-%m-%d", &timeinfo);
+    Serial.printf("Current Date: %s\n", date_buffer);
+
+    strftime(fdate_buffer, sizeof(fdate_buffer), "%Y-%m-%d", &futureTime);
+    Serial.printf("Future Date: %s\n", fdate_buffer);
+
+    snprintf(target, target_size, "https://api.openf1.org/v1/sessions?date_start>=%s&date_start<=%s&session_type=Race",
+        date_buffer,
+        fdate_buffer);
+
+    return 0;
+
+}
+
+int parse_session_json() {
+
+}
 
 void get_next_race(void *pvParameters) {
     TickType_t retryDelay = pdMS_TO_TICKS(10000);
     while (true) {
         if (WiFi.status() == WL_CONNECTED) {
+
             retryDelay = pdMS_TO_TICKS(10000);
+
             HTTPClient http;
+            http.setTimeout(10000);
             http.setCACert(OPENF1_ROOT_CA);
-            const bool requestReady = http.begin(
-                "https://api.openf1.org/v1/sessions?date_start%3E=2026-11-01&date_start%3C=2026-12-01&session_type=Race");
+
+            char query_url[103];
+            get_race_query_url(query_url, sizeof(query_url));
+            Serial.print("");
+            Serial.print("Query: ");
+            Serial.println(query_url);
+
+            const bool requestReady = http.begin(query_url);
             if (!requestReady) {
                 Serial.print("");
                 Serial.println("Failed to initialize OpenF1 request.");
             } else {
                 const int httpResponseCode = http.GET();
                 if (httpResponseCode > 0) {
-                    String response = http.getString();
-                    Serial.print("");
-                    Serial.println("Received response from OpenF1 API:");
-                    Serial.println(response);
+                    Stream& responseStream = http.getStream();
+                    Serial.printf("HTTP Size: %d\n", http.getSize());
+
+                    JsonDocument json;
+                    const DeserializationError err = deserializeJson(json, responseStream);
+                    if (err == DeserializationError::Ok) {
+                        JsonArray sessions = json.as<JsonArray>();
+                        if (sessions.size() != 0) {
+                            JsonObject nextRaceJson = sessions[0];
+                            const char* sessionName = nextRaceJson[F("session_name")];
+                            const char* dateStart = nextRaceJson[F("date_start")];
+                            const char* circuitName = nextRaceJson[F("circuit_short_name")];
+                            next_race.session_key = nextRaceJson[F("session_key")];
+                            next_race.meeting_key = nextRaceJson[F("meeting_key")];
+                            next_race.circuit_key = nextRaceJson[F("circuit_key")];
+                            if (sessionName != NULL) {
+                                strlcpy(next_race.session_name, sessionName, sizeof(next_race.session_name));
+                            }
+                            if (dateStart != NULL) {
+                                strlcpy(next_race.date_start, dateStart, sizeof(next_race.date_start));
+                            }
+                            if (circuitName != NULL) {
+                                strlcpy(next_race.circuit_short_name, circuitName, sizeof(next_race.circuit_short_name));
+                            }
+                            
+                            Serial.print("");
+                            Serial.print("Next race: ");
+                            Serial.print(next_race.session_name);
+                            Serial.print(" at ");
+                            Serial.print(next_race.circuit_short_name);
+                            Serial.print(" on ");
+                            Serial.println(next_race.date_start);
+                        }
+                    } else {
+                        Serial.print("");
+                        Serial.print("Failed to parse JSON response: ");
+                        Serial.println(err.c_str());
+                    }
+
                     retryDelay = pdMS_TO_TICKS(900000);
                 } else {
                     Serial.print("");
@@ -36,7 +125,7 @@ void get_next_race(void *pvParameters) {
             http.end();
         } else {
             Serial.print("");
-            Serial.println("WiFi not connected.");
+            Serial.println("WiFi not connecteFormattedd.");
         }
         vTaskDelay(retryDelay);
     }

src/main.cpp

@@ -21,6 +21,7 @@ static constexpr UWORD COUNTER_HEIGHT = 24;
 static constexpr UWORD COUNTER_Y = 20;
 static UBYTE counterBuffer[(COUNTER_WIDTH / 8) * COUNTER_HEIGHT];
 static int counter = 0;
+race_info next_race;
 
 void wifi_connect() {
     WiFi.setHostname(DEVICE_HOSTNAME);
@@ -89,12 +90,17 @@ void display_loop(void *pvParameters) {
         lastRefresh = millis();
 
         counter++;
-        snprintf(counterStr, sizeof(counterStr), "Counter: %d", counter);
-        Serial.print("");
-        Serial.println(counterStr);
+
+        if (next_race.session_key == 0) {
+            snprintf(counterStr, sizeof(counterStr), "Counter: %d", counter);
+            Serial.print("");
+            Serial.println(counterStr);
+        } else {
+            snprintf(counterStr, sizeof(counterStr), "%s", next_race.circuit_short_name);
+        }
 
         Paint_Clear(WHITE);
-        Paint_DrawString_EN(10, 0, counterStr, &Font16, BLACK, WHITE);
+        Paint_DrawString_EN(10, 0, counterStr, &Font16, WHITE, BLACK);
 
         EPD_4IN2_V2_PartialDisplay(
             counterBuffer,
@@ -117,7 +123,14 @@ void setup() {
 
     EPD_4IN2_V2_Init();
     Serial.println("e-Paper initialization complete; clearing display...");
-    EPD_4IN2_V2_Clear();
+    //EPD_4IN2_V2_Clear();
+
+    Paint_NewImage(displayBuffer, EPD_4IN2_V2_WIDTH, EPD_4IN2_V2_HEIGHT, ROTATE_0, WHITE);
+    Paint_SelectImage(displayBuffer);
+    Paint_Clear(WHITE);
+    Paint_DrawString_EN(10, 0, "F1 Display Booting...", &Font16, WHITE, BLACK);
+    Paint_DrawString_EN(10, COUNTER_Y, "Counter: 0", &Font16, WHITE, BLACK);
+    EPD_4IN2_V2_Display(displayBuffer);
 
     DEV_Delay_ms(500);
 
@@ -125,16 +138,9 @@ void setup() {
     sync_time();
     printf("Begin display loop.\n");
 
-    Paint_NewImage(displayBuffer, EPD_4IN2_V2_WIDTH, EPD_4IN2_V2_HEIGHT, ROTATE_0, WHITE);
-    Paint_SelectImage(displayBuffer);
-    Paint_Clear(WHITE);
-    Paint_DrawString_EN(10, 0, "F1 Display Test", &Font16, BLACK, WHITE);
-    Paint_DrawString_EN(10, COUNTER_Y, "Counter: 0", &Font16, BLACK, WHITE);
-    EPD_4IN2_V2_Display(displayBuffer);
-
     Paint_NewImage(counterBuffer, COUNTER_WIDTH, COUNTER_HEIGHT, ROTATE_0, WHITE);
     Paint_SelectImage(counterBuffer);
 
     xTaskCreate(display_loop, "display_loop", 1024, NULL, 5, NULL);
-    xTaskCreate(get_next_race, "get_next_race", 4096, NULL, 5, NULL);
+    xTaskCreate(get_next_race, "get_next_race", 2048, NULL, 5, NULL);
 }