allow the examples to build in a more strict env (#3299)

libraries/BLE/examples/BLE_client/BLE_client.ino

@@ -87,6 +87,7 @@ bool connectToServer() {
       pRemoteCharacteristic->registerForNotify(notifyCallback);
 
     connected = true;
+    return true;
 }
 /**
  * Scan for BLE servers and find the first one that advertises the service we are looking for.

libraries/BLE/src/BLECharacteristic.cpp

@@ -693,15 +693,13 @@ void BLECharacteristic::setValue(int& data32) {
 } // setValue
 
 void BLECharacteristic::setValue(float& data32) {
-	uint8_t temp[4];
-	*((float*)temp) = data32;
-	setValue(temp, 4);
+	float temp = data32;
+	setValue((uint8_t*)&temp, 4);
 } // setValue
 
 void BLECharacteristic::setValue(double& data64) {
-	uint8_t temp[8];
-	*((double*)temp) = data64;
-	setValue(temp, 8);
+	double temp = data64;
+	setValue((uint8_t*)&temp, 8);
 } // setValue
 
 

libraries/BLE/src/GeneralUtils.cpp

@@ -104,11 +104,10 @@ bool GeneralUtils::base64Encode(const std::string& in, std::string* out) {
  * * Amount of free RAM
  */
 void GeneralUtils::dumpInfo() {
-	size_t freeHeap = heap_caps_get_free_size(MALLOC_CAP_8BIT);
 	esp_chip_info_t chipInfo;
 	esp_chip_info(&chipInfo);
 	log_v("--- dumpInfo ---");
-	log_v("Free heap: %d", freeHeap);
+	log_v("Free heap: %d", heap_caps_get_free_size(MALLOC_CAP_8BIT));
 	log_v("Chip Info: Model: %d, cores: %d, revision: %d", chipInfo.model, chipInfo.cores, chipInfo.revision);
 	log_v("ESP-IDF version: %s", esp_get_idf_version());
 	log_v("---");

libraries/EEPROM/examples/eeprom_class/eeprom_class.ino

@@ -37,7 +37,8 @@ void setup() {
     ESP.restart();
   }
 
-  char* name = "Teo Swee Ann";
+  const char* name = "Teo Swee Ann";
+  char rname[32];
   double height = 5.8;
   uint32_t age = 47;
 
@@ -60,10 +61,10 @@ void setup() {
   Serial.println("------------------------------------\n");
 
   // Read: Variables <--- EEPROM stores
-  NAMES.get(0, name);
+  NAMES.get(0, rname);
   HEIGHT.get(0, height);
   AGE.get(0, age);
-  Serial.print("name: ");   Serial.println(name);
+  Serial.print("name: ");   Serial.println(rname);
   Serial.print("height: "); Serial.println(height);
   Serial.print("age: ");    Serial.println(age);
   

libraries/EEPROM/examples/eeprom_extra/eeprom_extra.ino

@@ -49,11 +49,11 @@ void setup() {
   EEPROM.writeULong(address, 4294967295);           // Same as writeUInt and readUInt
   address += sizeof(unsigned long);
 
-  int64_t value = -9223372036854775808;             // -2^63
+  int64_t value = -1223372036854775808LL;             // -2^63
   EEPROM.writeLong64(address, value);
   address += sizeof(int64_t);
 
-  uint64_t  Value = 18446744073709551615;           // 2^64 - 1
+  uint64_t  Value = 18446744073709551615ULL;           // 2^64 - 1
   EEPROM.writeULong64(address, Value);
   address += sizeof(uint64_t);
 

libraries/ESP32/examples/DeepSleep/TouchWakeUp/TouchWakeUp.ino

@@ -40,8 +40,6 @@ Method to print the touchpad by which ESP32
 has been awaken from sleep
 */
 void print_wakeup_touchpad(){
-  touch_pad_t pin;
-
   touchPin = esp_sleep_get_touchpad_wakeup_status();
 
   switch(touchPin)

libraries/ESP32/examples/ESPNow/Basic/Master/Master.ino

@@ -88,7 +88,7 @@ void ScanForSlave() {
         Serial.print(i + 1); Serial.print(": "); Serial.print(SSID); Serial.print(" ["); Serial.print(BSSIDstr); Serial.print("]"); Serial.print(" ("); Serial.print(RSSI); Serial.print(")"); Serial.println("");
         // Get BSSID => Mac Address of the Slave
         int mac[6];
-        if ( 6 == sscanf(BSSIDstr.c_str(), "%x:%x:%x:%x:%x:%x%c",  &mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5] ) ) {
+        if ( 6 == sscanf(BSSIDstr.c_str(), "%x:%x:%x:%x:%x:%x",  &mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5] ) ) {
           for (int ii = 0; ii < 6; ++ii ) {
             slave.peer_addr[ii] = (uint8_t) mac[ii];
           }
@@ -124,17 +124,15 @@ bool manageSlave() {
     }
 
     Serial.print("Slave Status: ");
-    const esp_now_peer_info_t *peer = &slave;
-    const uint8_t *peer_addr = slave.peer_addr;
     // check if the peer exists
-    bool exists = esp_now_is_peer_exist(peer_addr);
+    bool exists = esp_now_is_peer_exist(slave.peer_addr);
     if ( exists) {
       // Slave already paired.
       Serial.println("Already Paired");
       return true;
     } else {
       // Slave not paired, attempt pair
-      esp_err_t addStatus = esp_now_add_peer(peer);
+      esp_err_t addStatus = esp_now_add_peer(&slave);
       if (addStatus == ESP_OK) {
         // Pair success
         Serial.println("Pair success");
@@ -168,9 +166,7 @@ bool manageSlave() {
 }
 
 void deletePeer() {
-  const esp_now_peer_info_t *peer = &slave;
-  const uint8_t *peer_addr = slave.peer_addr;
-  esp_err_t delStatus = esp_now_del_peer(peer_addr);
+  esp_err_t delStatus = esp_now_del_peer(slave.peer_addr);
   Serial.print("Slave Delete Status: ");
   if (delStatus == ESP_OK) {
     // Delete success

libraries/ESP32/examples/ESPNow/Multi-Slave/Master/Master.ino

@@ -100,7 +100,7 @@ void ScanForSlave() {
         // Get BSSID => Mac Address of the Slave
         int mac[6];
 
-        if ( 6 == sscanf(BSSIDstr.c_str(), "%x:%x:%x:%x:%x:%x%c",  &mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5] ) ) {
+        if ( 6 == sscanf(BSSIDstr.c_str(), "%x:%x:%x:%x:%x:%x",  &mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5] ) ) {
           for (int ii = 0; ii < 6; ++ii ) {
             slaves[SlaveCnt].peer_addr[ii] = (uint8_t) mac[ii];
           }
@@ -127,8 +127,6 @@ void ScanForSlave() {
 void manageSlave() {
   if (SlaveCnt > 0) {
     for (int i = 0; i < SlaveCnt; i++) {
-      const esp_now_peer_info_t *peer = &slaves[i];
-      const uint8_t *peer_addr = slaves[i].peer_addr;
       Serial.print("Processing: ");
       for (int ii = 0; ii < 6; ++ii ) {
         Serial.print((uint8_t) slaves[i].peer_addr[ii], HEX);
@@ -136,13 +134,13 @@ void manageSlave() {
       }
       Serial.print(" Status: ");
       // check if the peer exists
-      bool exists = esp_now_is_peer_exist(peer_addr);
+      bool exists = esp_now_is_peer_exist(slaves[i].peer_addr);
       if (exists) {
         // Slave already paired.
         Serial.println("Already Paired");
       } else {
         // Slave not paired, attempt pair
-        esp_err_t addStatus = esp_now_add_peer(peer);
+        esp_err_t addStatus = esp_now_add_peer(&slaves[i]);
         if (addStatus == ESP_OK) {
           // Pair success
           Serial.println("Pair success");

libraries/ESP32/examples/RMT/RMTLoopback/RMTLoopback.ino

@@ -52,7 +52,7 @@ void loop()
     // Printout the received data plus the original values
     for (i=0; i<60; i++)
     {
-        Serial.printf("%08x=%08x ", my_data[i], data[i] );
+        Serial.printf("%08x=%08x ", my_data[i].val, data[i].val );
         if (!((i+1)%4)) Serial.println("\n");
     }
     Serial.println("\n");

libraries/ESP32/examples/RMT/RMTReadXJT/RMTReadXJT.ino

@@ -141,7 +141,6 @@ static bool xjtReceiveBit(size_t index, bool bit){
 }
 
 void parseRmt(rmt_data_t* items, size_t len, uint32_t* channels){
-    size_t chan = 0;
     bool valid = true;
     rmt_data_t* it = NULL;
 

libraries/FFat/examples/FFat_Test/FFat_Test.ino

@@ -165,8 +165,8 @@ void setup(){
         return;
     }
 
-    Serial.printf("Total space: %10lu\n", FFat.totalBytes());
-    Serial.printf("Free space: %10lu\n", FFat.freeBytes());
+    Serial.printf("Total space: %10u\n", FFat.totalBytes());
+    Serial.printf("Free space: %10u\n", FFat.freeBytes());
     listDir(FFat, "/", 0);
     writeFile(FFat, "/hello.txt", "Hello ");
     appendFile(FFat, "/hello.txt", "World!\r\n");
@@ -175,7 +175,7 @@ void setup(){
     readFile(FFat, "/foo.txt");
     deleteFile(FFat, "/foo.txt");
     testFileIO(FFat, "/test.txt");
-    Serial.printf("Free space: %10lu\n", FFat.freeBytes());
+    Serial.printf("Free space: %10u\n", FFat.freeBytes());
     deleteFile(FFat, "/test.txt");
     Serial.println( "Test complete" );
 }

libraries/WiFi/examples/ETH_LAN8720_internal_clock/ETH_LAN8720_internal_clock.ino

@@ -10,6 +10,9 @@
    * ETH_CLOCK_GPIO16_OUT - 50MHz clock from internal APLL output on GPIO16 - possibly an inverter is needed for LAN8720
    * ETH_CLOCK_GPIO17_OUT - 50MHz clock from internal APLL inverted output on GPIO17 - tested with LAN8720
 */
+#ifdef ETH_CLK_MODE
+#undef ETH_CLK_MODE
+#endif
 #define ETH_CLK_MODE    ETH_CLOCK_GPIO17_OUT
 
 // Pin# of the enable signal for the external crystal oscillator (-1 to disable for internal APLL source)

libraries/WiFi/examples/WiFiClientEvents/WiFiClientEvents.ino

@@ -121,6 +121,7 @@ void WiFiEvent(WiFiEvent_t event)
         case SYSTEM_EVENT_ETH_GOT_IP:
             Serial.println("Obtained IP address");
             break;
+        default: break;
     }}
 
 void WiFiGotIP(WiFiEvent_t event, WiFiEventInfo_t info)

libraries/WiFi/examples/WiFiUDPClient/WiFiUDPClient.ino

@@ -34,7 +34,7 @@ void loop(){
   if(connected){
     //Send a packet
     udp.beginPacket(udpAddress,udpPort);
-    udp.printf("Seconds since boot: %u", millis()/1000);
+    udp.printf("Seconds since boot: %lu", millis()/1000);
     udp.endPacket();
   }
   //Wait for 1 second
@@ -71,5 +71,6 @@ void WiFiEvent(WiFiEvent_t event){
           Serial.println("WiFi lost connection");
           connected = false;
           break;
+      default: break;
     }
 }

platform.txt

@@ -25,10 +25,10 @@ compiler.sdk.path={runtime.platform.path}/tools/sdk
 compiler.cpreprocessor.flags=-DESP_PLATFORM -DMBEDTLS_CONFIG_FILE="mbedtls/esp_config.h" -DHAVE_CONFIG_H "-I{compiler.sdk.path}/include/config" "-I{compiler.sdk.path}/include/app_trace" "-I{compiler.sdk.path}/include/app_update" "-I{compiler.sdk.path}/include/asio" "-I{compiler.sdk.path}/include/bootloader_support" "-I{compiler.sdk.path}/include/bt" "-I{compiler.sdk.path}/include/coap" "-I{compiler.sdk.path}/include/console" "-I{compiler.sdk.path}/include/driver" "-I{compiler.sdk.path}/include/esp-tls" "-I{compiler.sdk.path}/include/esp32" "-I{compiler.sdk.path}/include/esp_adc_cal" "-I{compiler.sdk.path}/include/esp_event" "-I{compiler.sdk.path}/include/esp_http_client" "-I{compiler.sdk.path}/include/esp_http_server" "-I{compiler.sdk.path}/include/esp_https_ota" "-I{compiler.sdk.path}/include/esp_ringbuf" "-I{compiler.sdk.path}/include/ethernet" "-I{compiler.sdk.path}/include/expat" "-I{compiler.sdk.path}/include/fatfs" "-I{compiler.sdk.path}/include/freemodbus" "-I{compiler.sdk.path}/include/freertos" "-I{compiler.sdk.path}/include/heap" "-I{compiler.sdk.path}/include/idf_test" "-I{compiler.sdk.path}/include/jsmn" "-I{compiler.sdk.path}/include/json" "-I{compiler.sdk.path}/include/libsodium" "-I{compiler.sdk.path}/include/log" "-I{compiler.sdk.path}/include/lwip" "-I{compiler.sdk.path}/include/mbedtls" "-I{compiler.sdk.path}/include/mdns" "-I{compiler.sdk.path}/include/micro-ecc" "-I{compiler.sdk.path}/include/mqtt" "-I{compiler.sdk.path}/include/newlib" "-I{compiler.sdk.path}/include/nghttp" "-I{compiler.sdk.path}/include/nvs_flash" "-I{compiler.sdk.path}/include/openssl" "-I{compiler.sdk.path}/include/protobuf-c" "-I{compiler.sdk.path}/include/protocomm" "-I{compiler.sdk.path}/include/pthread" "-I{compiler.sdk.path}/include/sdmmc" "-I{compiler.sdk.path}/include/smartconfig_ack" "-I{compiler.sdk.path}/include/soc" "-I{compiler.sdk.path}/include/spi_flash" "-I{compiler.sdk.path}/include/spiffs" "-I{compiler.sdk.path}/include/tcp_transport" "-I{compiler.sdk.path}/include/tcpip_adapter" "-I{compiler.sdk.path}/include/ulp" "-I{compiler.sdk.path}/include/vfs" "-I{compiler.sdk.path}/include/wear_levelling" "-I{compiler.sdk.path}/include/wifi_provisioning" "-I{compiler.sdk.path}/include/wpa_supplicant" "-I{compiler.sdk.path}/include/xtensa-debug-module" "-I{compiler.sdk.path}/include/esp-face" "-I{compiler.sdk.path}/include/esp32-camera" "-I{compiler.sdk.path}/include/esp-face" "-I{compiler.sdk.path}/include/fb_gfx"
 
 compiler.c.cmd=xtensa-esp32-elf-gcc
-compiler.c.flags=-std=gnu99 -Os -g3 -fstack-protector -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -mlongcalls -nostdlib -Wpointer-arith {compiler.warning_flags} -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-sign-compare -Wno-old-style-declaration -MMD -c
+compiler.c.flags=-std=gnu99 -Os -g3 -fstack-protector -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -mlongcalls -nostdlib -Wpointer-arith {compiler.warning_flags} -Wno-maybe-uninitialized -Wno-unused-function -Wno-unused-but-set-variable -Wno-unused-variable -Wno-deprecated-declarations -Wno-unused-parameter -Wno-sign-compare -Wno-old-style-declaration -MMD -c
 
 compiler.cpp.cmd=xtensa-esp32-elf-g++
-compiler.cpp.flags=-std=gnu++11 -fno-exceptions -Os -g3 -Wpointer-arith -fexceptions -fstack-protector -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -mlongcalls -nostdlib {compiler.warning_flags} -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-sign-compare -fno-rtti -MMD -c
+compiler.cpp.flags=-std=gnu++11 -Os -g3 -Wpointer-arith -fexceptions -fstack-protector -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -mlongcalls -nostdlib {compiler.warning_flags} -Wno-error=maybe-uninitialized -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-unused-but-set-parameter -Wno-missing-field-initializers -Wno-sign-compare -fno-rtti -MMD -c
 
 compiler.S.cmd=xtensa-esp32-elf-gcc
 compiler.S.flags=-c -g3 -x assembler-with-cpp -MMD -mlongcalls