test(i2c): Add test to scan bus (#11022)

* test(i2c): Add test to scan bus

* test(i2c): Add scan test with wifi running

* fix(i2c): Simplify test

Author: lucasssvaz

tests/validation/i2c_master/i2c_master.ino

@@ -5,6 +5,11 @@
 #include <Arduino.h>
 #include <unity.h>
 #include <Wire.h>
+#include <vector>
+#include <algorithm>
+#include <WiFi.h>
+
+#include "sdkconfig.h"
 
 /* DS1307 functions */
 
@@ -24,6 +29,9 @@ static uint8_t read_month = 0;
 static uint16_t read_year = 0;
 static int peek_data = -1;
 
+const char *ssid = "Wokwi-GUEST";
+const char *password = "";
+
 const auto BCD2DEC = [](uint8_t num) -> uint8_t {
   return ((num / 16 * 10) + (num % 16));
 };
@@ -245,6 +253,42 @@ void test_api() {
   Wire.flush();
 }
 
+bool device_found() {
+  uint8_t err;
+
+  for (uint8_t address = 1; address < 127; ++address) {
+    Wire.beginTransmission(address);
+    err = Wire.endTransmission();
+    log_d("Address: 0x%02X, Error: %d", address, err);
+    if (err == 0) {
+      log_i("Found device at address: 0x%02X", address);
+    } else if (address == DS1307_ADDR) {
+      log_e("Failed to find DS1307");
+      return false;
+    }
+  }
+
+  return true;
+}
+
+void scan_bus() {
+  TEST_ASSERT_TRUE(device_found());
+}
+
+#if SOC_WIFI_SUPPORTED
+void scan_bus_with_wifi() {
+  // delete old config
+  WiFi.disconnect(true, true, 1000);
+  delay(1000);
+  WiFi.begin(ssid, password);
+  delay(5000);
+  bool found = device_found();
+  WiFi.disconnect(true, true, 1000);
+
+  TEST_ASSERT_TRUE(found);
+}
+#endif
+
 /* Main */
 
 void setup() {
@@ -258,6 +302,10 @@ void setup() {
 
   log_d("Starting tests");
   UNITY_BEGIN();
+  RUN_TEST(scan_bus);
+#if SOC_WIFI_SUPPORTED
+  RUN_TEST(scan_bus_with_wifi);
+#endif
   RUN_TEST(rtc_set_time);
   RUN_TEST(rtc_run_clock);
   RUN_TEST(change_clock);