add basic SD-card support for reading files
This commit is contained in:
Norman Bos
@@ -4,7 +4,7 @@
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Based on the the following sketches:
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- SimpleWifiServer example
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- SD_Test
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- ESP32/SD_Test
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- IRremote/SendDemo
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@@ -13,15 +13,26 @@
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http://yourAddress/L turns it off
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Circuit:
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* LED attached to pin 13 (optional)
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* IR Transmitter attached to pin 4 (connect to 5v or 3v3)
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* SD-Module to load HTML and CSS from SD-card
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*
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* Connect the SD card to the following pins:
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*
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* SD Card | ESP32
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* 3v3 3.3V
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* CS 5
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* MOSI 23
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* CLK 18
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* MISO 19
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* GND GND
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developed for the ESP32vn IoT Uni board 2024
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*/
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#include "FS.h"
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#include "SD.h"
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#include "SPI.h"
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#include <WiFi.h>
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#include <IRremote.hpp>
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@@ -30,12 +41,153 @@
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WiFiServer server(80);
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/**** SD-Card Functions ****/
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void listDir(fs::FS &fs, const char * dirname, uint8_t levels){
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Serial.printf("Listing directory: %s\n", dirname);
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File root = fs.open(dirname);
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if(!root){
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Serial.println("Failed to open directory");
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return;
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}
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if(!root.isDirectory()){
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Serial.println("Not a directory");
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return;
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}
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File file = root.openNextFile();
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while(file){
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if(file.isDirectory()){
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Serial.print(" DIR : ");
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Serial.println(file.name());
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if(levels){
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listDir(fs, file.path(), levels -1);
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}
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} else {
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Serial.print(" FILE: ");
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Serial.print(file.name());
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Serial.print(" SIZE: ");
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Serial.println(file.size());
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}
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file = root.openNextFile();
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}
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}
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void readFile(fs::FS &fs, const char * path){
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Serial.printf("Reading file: %s\n", path);
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File file = fs.open(path);
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if(!file){
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Serial.println("Failed to open file for reading");
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return;
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}
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Serial.print("Read from file: ");
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while(file.available()){
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Serial.write(file.read());
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}
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file.close();
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}
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void testFileIO(fs::FS &fs, const char * path){
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File file = fs.open(path);
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static uint8_t buf[512];
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size_t len = 0;
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uint32_t start = millis();
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uint32_t end = start;
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if(file){
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len = file.size();
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size_t flen = len;
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start = millis();
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while(len){
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size_t toRead = len;
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if(toRead > 512){
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toRead = 512;
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}
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file.read(buf, toRead);
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len -= toRead;
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}
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end = millis() - start;
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Serial.printf("%u bytes read for %u ms\n", flen, end);
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file.close();
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} else {
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Serial.println("Failed to open file for reading");
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}
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file = fs.open(path, FILE_WRITE);
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if(!file){
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Serial.println("Failed to open file for writing");
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return;
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}
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size_t i;
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start = millis();
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for(i=0; i<2048; i++){
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file.write(buf, 512);
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}
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end = millis() - start;
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Serial.printf("%u bytes written for %u ms\n", 2048 * 512, end);
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file.close();
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}
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/* ============ IR Functions ============ */
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void sendButton(int command)
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{
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Serial.println(command);
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Serial.flush();
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IrSender.sendSony(0xF, command, 2, 12);
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}
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/* ============ Setup ============ */
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void setup() {
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Serial.begin(115200);
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pinMode(LED_PIN, OUTPUT); // set the LED pin mode
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delay(10);
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/* ============ SD-Card Setup ============ */
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if(!SD.begin()){
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Serial.println("Card Mount Failed");
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return;
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}
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uint8_t cardType = SD.cardType();
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if(cardType == CARD_NONE){
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Serial.println("No SD card attached");
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return;
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}
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Serial.print("SD Card Type: ");
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if(cardType == CARD_MMC){
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Serial.println("MMC");
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} else if(cardType == CARD_SD){
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Serial.println("SDSC");
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} else if(cardType == CARD_SDHC){
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Serial.println("SDHC");
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} else {
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Serial.println("UNKNOWN");
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}
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uint64_t cardSize = SD.cardSize() / (1024 * 1024);
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Serial.printf("SD Card Size: %lluMB\n", cardSize);
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listDir(SD, "/", 0);
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readFile(SD, "/index.html");
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Serial.printf("Total space: %lluMB\n", SD.totalBytes() / (1024 * 1024));
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Serial.printf("Used space: %lluMB\n", SD.usedBytes() / (1024 * 1024));
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/* ============ IR Setup ============ */
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IrSender.begin(IR_SEND_PIN, ENABLE_LED_FEEDBACK, USE_DEFAULT_FEEDBACK_LED_PIN); // Specify send pin and enable feedback LED at default feedback LED pin
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Serial.println();
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Serial.print(F("Send IR signals at pin "));
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Serial.println(IR_SEND_PIN);
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/* ============ Webserver Setup ============ */
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// We start by connecting to a WiFi network
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Serial.println();
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@@ -50,11 +202,6 @@ void setup() {
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Serial.print(".");
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}
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IrSender.begin(IR_SEND_PIN, ENABLE_LED_FEEDBACK, USE_DEFAULT_FEEDBACK_LED_PIN); // Specify send pin and enable feedback LED at default feedback LED pin
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Serial.println();
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Serial.print(F("Send IR signals at pin "));
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Serial.println(IR_SEND_PIN);
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Serial.println();
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Serial.println("WiFi connected.");
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Serial.println("IP address: ");
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@@ -63,8 +210,6 @@ void setup() {
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server.begin();
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}
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void loop() {
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WiFiClient client = server.available(); // listen for incoming clients
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@@ -87,16 +232,8 @@ void loop() {
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client.println();
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// the content of the HTTP response follows the header:
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client.print("Click <a href=\"/H\">here</a> to turn the LED on pin 13 on.<br>");
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client.print("Click <a href=\"/L\">here</a> to turn the LED on pin 13 off.<br>");
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client.print("<a href=\"/power\">power</a><br>");
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client.print("<a href=\"/play\">play</a><br>");
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client.print("<a href=\"/pause\">pause</a><br>");
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client.print("<a href=\"/stop\">stop</a><br>");
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client.print("<a href=\"/prev\">previous track</a><br>");
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client.print("<a href=\"/next\">next track</a><br>");
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client.print("<form action=\"/api/control-deck\" method=\"post\"><button name=\"control\" type=\"submit\" value=\"play\">play</button></form><br>");
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client.print("<form action=\"/api/control-deck\" method=\"get\"><input name=\"textinput\" type=\"text\" /><button type=\"submit\">send</button></form><br>");
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client.print("Click <a href=\"/H\">here</a> to turn the LED on pin 13 on.<br>Click <a href=\"/L\">here</a> to turn the LED on pin 13 off.<br><a href=\"/power\">power</a><br><a href=\"/play\">play</a><br><a href=\"/pause\">pause</a><br><a href=\"/stop\">stop</a><br><a href=\"/prev\">previous track</a><br><a href=\"/next\">next track</a><br>");
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client.print("<form action=\"/api/control-deck\" method=\"post\"><button name=\"control\" type=\"submit\" value=\"play\">play</button></form><br><form action=\"/api/control-deck\" method=\"get\"><input name=\"textinput\" type=\"text\" /><button type=\"submit\">send</button></form><br>");
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// The HTTP response ends with another blank line:
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client.println();
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@@ -148,9 +285,4 @@ void loop() {
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}
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}
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void sendButton(int command)
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{
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Serial.println(command);
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Serial.flush();
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IrSender.sendSony(0xF, command, 2, 12);
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}
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